4.7 Article

Effect of vane angle on combustion characteristics of premixed H2/air in swirl micro-combustors with straight vane or twisted vane

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Engineering, Chemical

Combustion and thermal characteristics of a miniature double-layer disc-combustor with porous media and Swiss-roll preheated channel

Siqi Cai et al.

Summary: A novel miniature double-layer disc-combustor with porous media and Swiss-roll preheated channel is developed for the first time. The combustion characteristics of 60%CH4-40%H2-air in this combustor are investigated, showing an anomalous blow-off phenomenon in the radial channel. Additionally, the flame diameter slightly decreases with the decreased equivalence ratio due to the thermal expansion effect. Overall, the present double-layer disc-combustor exhibits good thermal performance in a wide operating range.

CHEMICAL ENGINEERING SCIENCE (2023)

Article Thermodynamics

Parametric study of cavity on the performance of a hydrogen-fueled micro planar combustor for thermophotovoltaic applications

Wei Zuo et al.

Summary: A hydrogen-fueled micro planar combustor with cavity is designed to achieve high energy output power and energy conversion efficiency for micro-thermophotovoltaic system. Numerical investigations show that the micro planar combustor with cavity can achieve higher and more uniform outer wall temperature. With the reduction of cavity length and outlet size, the energy output and energy conversion efficiency of MTPV increase, but the pressure loss also becomes larger. The optimal dimensionless cavity length and outlet size are found to be 3/9 and 5/7 x 1/3, respectively. Nickel is identified as the optimal solid wall material for higher energy conversion efficiency, reaching 3.86% at an inlet velocity of 5 m/s. Therefore, the micro planar combustor with cavity is more suitable for MTPV system with higher energy output and energy conversion efficiency.

ENERGY (2023)

Review Thermodynamics

A comprehensive review on performance improvement of micro energy mechanical system: Heat transfer, micro combustion and energy conversion

E. Jiaqiang et al.

Summary: This study discusses methods to improve combustion efficiency, including optimization of spatial structure, catalytic combustion, and fuel improvement. It also reviews the improvement of energy conversion and emission performance of micro thermophotovoltaic, micro thermoelectric, and micro engine systems. The study points out the limitations of single optimization methods and suggests that future research should combine the advantages of various methods.

ENERGY (2022)

Article Thermodynamics

Combustion characteristic of premixed H2/air in the micro cavity combustor with guide vanes

Wei Gao et al.

Summary: The research shows that the cavity combustor with guide vanes has better combustion characteristics and higher temperature in the high-temperature zone compared to the traditional cavity combustor. It also has better preheating and ignition effects under different guide vane geometries.

ENERGY (2022)

Article Energy & Fuels

Effects analysis on the catalytic combustion and heat transfer performance enhancement of a non-premixed hydrogen/air micro combustor

Jiaqiang E et al.

Summary: The study shows that in the catalytic combustor, homogeneous reactions are significantly weakened, resulting in higher and more uniform outer wall temperatures, better fluid mixing, and reduced temperature difference at the outer wall. Additionally, the catalytic combustor exhibits lower average flow velocity and pressure loss at an inlet velocity of 10 m/s.
Review Energy & Fuels

Influencing factors of wall temperature and flame stability of micro-combustors in micro-thermophotovoltaic and micro-thermoelectric systems

Peng Qian et al.

Summary: Micro-thermophotovoltaic and micro-thermoelectric systems have attracted extensive attention for their compact configuration, no mechanical noise, wide fuel applicability, and high energy density. The focus of research has been on micro-combustors, with concerns about wall temperature and flame stability. Various micro-combustors with different designs have been proposed, but the effects of influential parameters need to be analyzed and summarized for further research.
Article Energy & Fuels

Numerical simulation and emission analysis of ammonia/oxygen premixed combustion process in micro-combustor with baffle

Shanshan Xiao et al.

Summary: This paper studied the combustion and emission characteristics of ammonia/oxygen in a micro burner with a baffle by numerical simulation. The results show that the addition of a baffle reduces the channel temperature, radiation efficiency, and NO emission. The length, width, and position of the baffle have an impact on the temperature field and NO emission.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2022)

Article Engineering, Environmental

NOx emission reduction in ammonia-powered micro-combustors by partially inserting porous medium under fuel-rich condition

Siliang Ni et al.

Summary: This study investigates the NOx emission performance in fuel-rich combustion of ammonia using micro combustors with double-rib structure partially inserted with porous medium. The results show that the porous medium can effectively reduce NO generation and emission under a larger inlet velocity. Increasing the thermal conductivity of the porous material can greatly decrease the emission of NO, but increase the emission of N2O. Additionally, increasing the porosity of the porous material leads to an increase in NO emission but a decrease in N2O emission.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Energy & Fuels

Study on combustion characteristic of premixed H2/C3H8/air and working performance in the micro combustor with block

Qingguo Peng et al.

Summary: The combustion characteristics and thermal performance of premixed H-2/C3H8/air in a micro planar combustor with a block insert were experimentally and numerically tested. The effects of hydrogen blended fraction, equivalence ratio, flow rate, and block width on flame stability and heat transfer were discussed and analyzed. The results showed that adding hydrogen improved combustion stability in the micro combustor, and the lowest hydrogen blending mole fraction for a steady flame of the premixed H-2/C3H8/air was obtained through experimental study.
Article Energy & Fuels

Comprehensive numerical insight the thermal performance improvement of the micro combustors with internal bionic Y-shaped fins for micro-thermal voltaic system applications

Zongguo Xue et al.

Summary: An innovative micro-combustion chamber with internal Y-shaped fins is introduced to enhance the comprehensive thermal performance of the micro thermal voltaic system (MTPV). The results show that the micro-combustion chamber with internal Y-shaped fins exhibits excellent thermal performance. However, an increase in the number of fins leads to a decrease in temperature uniformity and an increase in pressure drop.
Article Chemistry, Physical

Numerical study on methane/air combustion characteristics in a heat-recirculating micro combustor embedded with porous media

Yunfei Yan et al.

Summary: This paper investigates the temperature distribution and exhaust species in a heat-recirculating micro-combustor embedded with porous media. The results indicate that embedding porous media improves temperature uniformity and preheating capacity. SiC material performs better in thermal stability and heat recirculating than Al(2)O(3) and ZrO2. The optimal equivalence ratio for methane/air combustion is in the range of 0.1-0.5, enabling super-enthalpy combustion.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Physical

Effect of a crossed-semicircular-plate on thermal performance of micro-combustor fueled by premixed hydrogen-air mixture

Hongyan Zuo et al.

Summary: This article presents a novel crossed semicircular plate to enhance the thermal efficiency of a micro-combustor. The effects of various design parameters on the thermal performance of the micro-combustor were investigated, and the findings provide important guidance for the design and optimization of micro-combustors.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Green & Sustainable Science & Technology

Investigation on combustion characteristics and thermal performance of a three rearward-step structure micro combustor fueled by premixed hydrogen/air

Yan Tan et al.

Summary: A three-dimensional mathematical model of premixed hydrogen/air mixtures in micro combustors with rearward-step structure is established in this study to achieve high and uniform wall temperature distribution. The effects of rearward-step structure and inlet velocity on combustion characteristics and thermal performance in the micro combustor are investigated. The results indicate that the rearward-step structure enhances combustion intensity and stabilizes the flame, but also increases the temperature non-uniformity of the outer wall in the micro combustor.

RENEWABLE ENERGY (2022)

Article Energy & Fuels

Effect of helical fins on the combustion performance in a micro-step combustor

Zheng Zhang et al.

Summary: This study proposed a novel helical-fin-assisted micro-step Helix combustor to improve the performance of micro-combustors under high flow rates. The effects of the helical fins on the flow and combustion characteristics were analyzed and it was found that the helical fins enhance the heat transfer between the flame and fins, resulting in improved combustion efficiency. Choosing different flame stabilization modes for different applications can achieve higher thermal efficiency or combustion efficiency.
Article Thermodynamics

Reacting flow characteristics based on the axis-switching phenomenon in a baffled micro combustor with rotated noncircular holes for micro-thermophotovoltaic system

Won Hyun Kim et al.

Summary: This study explores the design of a combustor for a thermophotovoltaic (TPV) generator to strengthen the axis-switching phenomenon. Various simulations and flow field investigations are conducted to analyze the effects of noncircular holes in the combustor on combustion efficiency.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2022)

Article Green & Sustainable Science & Technology

Parametric study of inserting internal spiral fins on the micro combustor performance for thermophotovoltaic systems

Ziqiang He et al.

Summary: With the rapid development of MEMS devices, there is a growing interest in power systems based on micro scale combustion. This study investigates the thermal performance and flame characteristics of micro combustion using three-dimensional models and detailed reaction mechanisms. The findings highlight the significant impact of spiral fins on the energy output of micro thermophotovoltaic systems.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2022)

Article Thermodynamics

Numerical study on combustion characteristics and heat transfer enhancement of the micro combustor embedded with Y-shaped fin for micro thermo-photovoltaic system

Chenghua Zhang et al.

Summary: In this study, a Y-shaped fin was designed to improve the combustion and thermal performance of a micro combustor. The results showed that embedding a Y-shaped fin significantly enhanced the combustion and thermal performance, with the best comprehensive performance observed in the micro combustor embedded with the Y-shaped fin. Increasing the length of the Y-shaped fin improved heat transfer but compromised temperature uniformity and consumed more power. Furthermore, increasing the inlet velocity improved energy conversion but reduced efficiency and caused a significant pressure drop. The study also emphasized the importance of using high thermal conductivity materials for energy conversion in micro thermo-photovoltaic systems. Overall, this study provides valuable insights for improving energy conversion in micro thermo-photovoltaic systems.

APPLIED THERMAL ENGINEERING (2022)

Article Thermodynamics

Non-premixed combustion characteristics and thermal performance of a catalytic combustor for micro-thermophotovoltaic systems

Linhong Li et al.

Summary: The study verified that a symmetrical configuration of micro-combustor can improve combustion efficiency and radiation efficiency, allowing it to operate at higher average velocities. Furthermore, as the average velocity increases, combustion efficiency decreases monotonically while radiation efficiency and radiant energy output increase first and then decrease.

ENERGY (2021)

Article Chemistry, Physical

Thermal performance improvement of premixed hydrogen/air fueled cylindrical micro-combustor using a preheater-conductor plate

Shiguang Wu et al.

Summary: A novel preheater-conductor plate was designed to be inserted into a cylindrical micro-combustor to improve the outer wall temperature and the exergy efficiency. The study investigated the impact of different factors on the thermal performance of the micro-combustor, finding that the proposed preheater-conductor plate significantly improved the system's performance.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

Numerical study on premixed hydrogen/air combustion characteristics and heat transfer enhancement of micro-combustor embedded with pin fins

Yunfei Yan et al.

Summary: This study focuses on optimizing the structure of micro combustors to improve energy output performance of MTPV systems. Results show that both MCIPF and MCEPF have higher combustion efficiency compared to the conventional MCC, with MCIPF having the highest external wall temperature under different conditions and MCEPF maintaining the best temperature uniformity. The application of high thermal conductivity materials like Aluminum, Red Copper, and Silicon Carbide can enhance external wall temperature and temperature uniformity, providing a new design method for improved heat transfer in micro combustors.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

Numerical investigation on combustion characteristics of premixed hydrogen/air in a swirl micro combustor with twisted vanes

Wei Gao et al.

Summary: The swirl micro combustor with twisted vanes (Swirl-MC-TV) demonstrates better combustion stability and efficiency compared to the conventional micro combustor (Conventional-MC) under conditions of high inlet velocity, steel and SiC wall materials, and high equivalence ratio.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Review Energy & Fuels

Recent progress in flame stabilization technologies for combustion-based micro energy and power systems

Jianlong Wan et al.

Summary: This article discusses the development and classification of flame stabilization technologies in micro-combustors, including single flame stabilization technologies, combined flame stabilization technologies, and other technologies. Progress made in the past decade is summarized, along with a discussion on the underlying mechanisms of these flame anchoring strategies.
Article Chemistry, Physical

Numerical study on the influence of controllable flow ratio on combustion characteristics of a controllable central slotted bluff body and cavity combined micro combustor

Fulei Xu et al.

Summary: The CC micro combustor with a controllable flow rate of 0.4 exhibits the highest combustion efficiency and better combustion stability under high inlet volume flow rates in micro combustion systems.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

A novel Swiss-roll micro-combustor with double combustion chambers: A numerical investigation on effect of solid material on premixed CH4/air flame blow-off limit

Lun Ma et al.

Summary: A novel Swiss-roll micro-combustor with double combustion chambers is proposed to improve flame stability and extend blow-off limits. Different solid materials (SiC, stainless steel, and copper) have a significant impact on flame stability and blow-off limits in micro-combustors. Good heat recirculation and low heat loss rates play a crucial role in influencing blow-off limits in micro-combustors.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Thermodynamics

Laminar non-premixed flame patterns in compact micro disc-combustor with annular step and radial preheated channel

Jianlong Wan et al.

Summary: This study investigated the laminar methane-air non-premixed flame patterns in a radial microchannel under the synergistic effect of heat and flow recirculation through numerical simulations. It found that the flame remained stable until extinguished, indicating strong flame stability. Different flame patterns were observed at small, moderate, and large Reynolds numbers, providing insights into flame propagation characteristics in a radial channel.

COMBUSTION AND FLAME (2021)

Article Thermodynamics

Numerical investigations on hydrogen-fueled micro-cylindrical combustors with cavity for micro-thermophotovoltaic applications

Wei Zuo et al.

Summary: The study found that the micro-cylindrical combustor with cavity has better thermal performance compared to the one without cavity. By analyzing the effects of cavity length and depth, the optimal cavity size was determined, and it was concluded that the combustor with cavity has better potential for applications in micro-TPV systems.

ENERGY (2021)

Article Chemistry, Applied

Role of hydrogen addition in propane/air flame characteristic and stability in a micro-planar combustor

Aikun Tang et al.

Summary: Experimental study on micro-scale combustion with a micro-planar quartz combustor shows that blending hydrogen significantly extends flame stability by overcoming flame instability and inhibiting flame type transition. The addition of hydrogen affects flame dynamics and helps maintain flame symmetry.

FUEL PROCESSING TECHNOLOGY (2021)

Article Chemistry, Physical

Thermal performance characteristics of a micro-combustor with swirl rib fueled with premixed hydrogen/air

Shiguang Wu et al.

Summary: A swirl rib was designed to improve the thermal efficiency of a micro-combustor in this study, with trapezoidal rib showing the best thermal performance. This research provides theoretical guidance for the optimal design of hydrogen-fueled micro-combustors.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

Numerical comparison of premixed H2/air combustion characteristic of three types of micro cavity-combustors with guide vanes, bluff body, guide vanes and bluff body respectively

Wei Gao et al.

Summary: The study compares the combustion characteristics of three types of micro cavity combustors with guide vanes, bluff body, and a combination of bluff body and guide vanes under different conditions. It is found that guide vanes greatly enhance combustion intensity and stability near the cavity, leading to increased combustion efficiency.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Energy & Fuels

Effect of dimethyl ether addition on flame stability of premixed methane/air in a micro-planar quartz combustor

Jianming Li et al.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2020)

Article Chemistry, Physical

Numerical investigation on the performance of bluff body augmented micro cavity-combustor

Zheng Zhang et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

Article Chemistry, Physical

Anomalous blow-off limit of methane-air premixed flame in a micro preheated combustor with a flame holder

Jianlong Wan et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

Article Chemistry, Physical

Effect of the cavity aft ramp angle on combustion efficiency of lean hydrogen/air flames in a micro cavity-combustor

Linhong Li et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

Article Energy & Fuels

Experimental investigation on non-premixed CH4/air combustion in a novel miniature Swiss-roll combustor

Shixuan Wang et al.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2019)

Article Chemistry, Physical

Numerical and entropy studies of hydrogen-fuelled micro-combustors with different geometric shaped ribs

Siliang Ni et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

Article Thermodynamics

Experimental study on premixed methane-air catalytic combustion in rectangular micro channel

Jianfeng Pan et al.

APPLIED THERMAL ENGINEERING (2017)

Article Thermodynamics

Effects of heat recirculation on combustion characteristics of n-heptane in micro combustors

Junwei Li et al.

APPLIED THERMAL ENGINEERING (2016)

Article Engineering, Environmental

Fundamental flame characteristics of premixed H-2-air combustion in a planar porous micro-combustor

Jun Li et al.

CHEMICAL ENGINEERING JOURNAL (2016)

Article Thermodynamics

Numerical study on heat recirculation in a porous micro-combustor

Jun Li et al.

COMBUSTION AND FLAME (2016)

Article Thermodynamics

On flame propagation in narrow channels with enhanced wall thermal conduction

Ananthanarayanan Veeraragavan

ENERGY (2015)

Article Thermodynamics

Interactions between heat transfer, flow field and flame stabilization in a micro-combustor with a bluff body

Aiwu Fan et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2013)

Article Thermodynamics

Oscillating and rotating flame patterns in radial microchannels

Sergey Minaev et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2013)

Review Thermodynamics

A review on microcombustion: Fundamentals, devices and applications

Niket S. Kaisare et al.

PROGRESS IN ENERGY AND COMBUSTION SCIENCE (2012)

Review Energy & Fuels

Development of micro power generators - A review

S. K. Chou et al.

APPLIED ENERGY (2011)

Review Thermodynamics

Advances and challenges in the development of power-generation systems at small scales

David C. Walther et al.

PROGRESS IN ENERGY AND COMBUSTION SCIENCE (2011)

Review Thermodynamics

Microscale combustion: Technology development and fundamental research

Yiguang Ju et al.

PROGRESS IN ENERGY AND COMBUSTION SCIENCE (2011)

Article Engineering, Multidisciplinary

Comparison of turbulence models in simulating swirling pipe flows

Andrew Escue et al.

APPLIED MATHEMATICAL MODELLING (2010)

Article Thermodynamics

Experimental study on premixed CH4/air mixture combustion in micro Swiss-roll combustors

Zhong Bei-Jing et al.

COMBUSTION AND FLAME (2010)

Article Thermodynamics

Experimental study of spinning combustion in a mesoscale divergent channel

Bo Xu et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2007)

Article Thermodynamics

On the formation of multiple rotating Pelton-like flame structures in radial microchannels with lean methane-air mixtures

Sudarshan Kumar et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2007)

Article Thermodynamics

Numerical modeling of non-adiabatic heat-recirculating combustors

C. H. Kuo et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2007)

Article Physics, Applied

Study of catalytic combustion and its effect on microthermophotovoltaic power generators

WM Yang et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2005)

Article Chemistry, Physical

An updated comprehensive kinetic model of hydrogen combustion

J Li et al.

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS (2004)