Modal analysis of mixing characteristics in scramjet combustor with passive struts

Article Engineering, Aerospace

Flow structure and fuel mixing of hydrogen multi-jets in existence of upstream divergent ramp at supersonic combustion chamber

Qingji Tian et al.

Summary: This study utilized computational fluid dynamics to investigate the impact of an upstream ramp on fuel mixing, and found that the presence of an upstream ramp significantly improves fuel mixing performance.

AEROSPACE SCIENCE AND TECHNOLOGY (2022)

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Article Engineering, Aerospace

Mixing efficiency of hydrogen jet through multi lobe-injectors at scramjet engine: A numerical study

Peixi Guo et al.

Summary: The fuel mixing efficiency of a transverse hydrogen multi-jet with lobe-shape nozzle was investigated in this study. The results showed that the application of a 3-lobe injector enhanced fuel mixing and penetration more than other nozzles. Fuel mixing was found to be directly associated with the power of the upstream vortex generated nearby the first injector.

AEROSPACE SCIENCE AND TECHNOLOGY (2022)

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Review Mechanics

Dynamic Mode Decomposition and Its Variants

Peter J. Schmid

Summary: Dynamic mode decomposition (DMD) is a technique for factorization and dimensionality reduction of data sequences, which simplifies complex evolution processes to their dominant features and essential components. It has been widely applied in various fields beyond fluid dynamics as well.

ANNUAL REVIEW OF FLUID MECHANICS (2022)

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Article Engineering, Aerospace

Influence of sinusoidal shock generator on mixing performance of hydrogen and air co-flow jets in dual-combustor ramjet

MohammadKazem Rostamian et al.

Summary: This article presents a comprehensive study on the impacts of a wavy shock generator on the flow structure and mixing of air and hydrogen jets in dual combustion ramjet engine. The study found that the presence of the wavy shock generator amplifies the barrel shock near the fuel injector, and the formation of expansion waves enhances the shock interactions and augments the mixing performance.

ACTA ASTRONAUTICA (2022)

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Article Energy & Fuels

Investigation of flow characteristics in supersonic combustion ramjet combustor toward improvement of combustion efficiency

Prasanth P. Nair et al.

Summary: This study focuses on the flow characteristics within the combustion chamber of the scramjet engine designed to improve energy efficiency by enhancing combustion efficiency using strut-based flame stabilizer. The research found that the placement of secondary strut in a three-strut configuration plays a vital role in improving combustion efficiency.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2021)

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Article Engineering, Aerospace

Numerical investigation of combustion characteristics of upstream crescent cavities in a scramjet combustor

Tim Roos et al.

Summary: This study investigates the combustion performance of novel crescent shaped cavities placed in front of the fuel injection point in a scramjet combustor. The cavities were found to significantly enhance combustion and mixing performance, especially when hybrid fuelling is used. The introduction of crescent cavities can improve combustion efficiency, reduce viscous drag, accelerate ignition, but also increase fuel concentration near the wall, leading to lower flame penetration and mean heat flux.

ACTA ASTRONAUTICA (2021)

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Article Engineering, Aerospace

Numerical study on the induced-ramp mixed and combustion characteristics of rocket-based combined cycle engine

Dai Jian et al.

Summary: This study discusses the supersonic flow mechanism and mixed characteristics of rocket-based combined cycle engines by changing the ramp angle and momentum flux ratio. Results show that increasing the ramp angle and momentum flux ratio can improve combustion efficiency and induce vortex structure for optimal penetration depth of jet fuel.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

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Article Engineering, Aerospace

Influence of upstream angled ramp on fuel mixing of hydrogen jet at supersonic cross flow

Yu Jiang et al.

Summary: This paper investigates the significant process of the fuel injection system in the design of the scramjet engine, focusing on the effect of the upstream ramp edge on fuel distribution and fuel mixing in supersonic air streams. The results show that the application of the upstream ramp substantially influences the incoming supersonic airflow and changes the strength of vortices close to the jet, with the mixing performance increasing with the ramp angle.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

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Article Chemistry, Physical

Combustion efficiency improvement for scramjet combustor with strut based flame stabilizer using passive techniques

Prasanth P. Nair et al.

Summary: In a study on Scramjet engines, the placement of trailing struts plays a crucial role in enhancing combustion efficiency. Different strut configurations have varying effects on combustion performance, with configurations introducing high-pressure regions outperforming others. The addition of trailing struts leads to increased combustion efficiency and total pressure loss in the engine.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

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Article Engineering, Aerospace

Effect of downstream sinusoidal wall on mixing performance of hydrogen multi-jets at supersonic flow: Numerical study

Yu Jiang et al.

Summary: This study investigates the mixing and distribution of multiple hydrogen jets under the influence of a downstream sinusoidal wall, revealing that the frequency of the downstream wavy wall significantly limits fuel distribution and that increasing jet spacing on the symmetry plane decreases fuel concentration. Computational fluid dynamics with SST turbulence model is used to simulate sonic multi hydrogen cross jets at supersonic air stream, highlighting the importance of downstream wavy profiles on fuel distribution and mixing region.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

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Article Mechanics

Numerical investigation of shock-turbulent mixing layer interaction and shock-associated noise

Fangcheng Shi et al.

Summary: This paper conducts direct numerical simulation of shock-turbulent mixing layer interaction to investigate the influence of shock-turbulent interaction on turbulence evolution and shock-associated noise. The results show changes in turbulent kinetic energy, pressure fluctuation, and Reynolds-stress anisotropy, as well as an increase in shock-associated noise level and high-frequency noise. The study identifies two generation mechanisms of shock-associated noise and explores the impact of shock strength on noise reduction.

PHYSICS OF FLUIDS (2021)

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Article Engineering, Aerospace

Influence of trapezoidal lobe strut on fuel mixing and combustion in supersonic combustion chamber

Yu Jiang et al.

Summary: This article investigates the fuel injection system in supersonic vehicles, focusing on the use of a trapezoidal strut injector to enhance fuel mixing. The strength of vortices is influenced by injector velocity and free stream conditions, with the results showing an 18% improvement in fuel mixing when using a trapezoidal strut injector.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

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Article Engineering, Aerospace

Mixing efficiency of hydrogen and air co-flow jets via wedge shock generator in dual-combustor ramjet

Yu Jiang et al.

Summary: The study focused on the effects of wedge shock generator on the co-flow of air and hydrogen jet. The results showed that lower wedge angle and higher total pressure of air and fuel jet led to more intense fluctuations in the total pressure and destabilization of flame propagation.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

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Article Chemistry, Physical

Effect of hydrogen jets in supersonic mixing using strut injection schemes

S. Jeyakumar et al.

Summary: The study investigates the performance of modified strut injection strategies in a supersonic scramjet combustor, demonstrating that dual injection configuration can reduce shock wave impact and maintain the magnitude of internal forces and total pressure loss. Multiple injections alter the frequency and number of dominant modes in the flow field.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

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Article Mechanics

Aeroacoustic modal analysis of underexpanded pipe jets with and without an upstream cavity

Kabilan Baskaran et al.

Summary: Experimental investigation of the aeroacoustics of an underexpanded pipe-cavity jet was conducted with different aspect ratios of the cavity and a wide range of nozzle pressure ratios. The study focused on both internal and externally radiated pipe-cavity acoustics, showing that increased cavity depth leads to enhanced nonlinear interactions. High-speed schlieren imaging and decomposition methods were used to understand jet dynamics and segregate different dynamics in the system.

PHYSICS OF FLUIDS (2021)

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Article Engineering, Aerospace

The influence of the wedge shock generator on the vortex structure within the trapezoidal cavity at supersonic flow

Zhixiong Li et al.

AEROSPACE SCIENCE AND TECHNOLOGY (2020)

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Article Thermodynamics

The effect of sinusoidal wall on hydrogen jet mixing rate considering supersonic flow

Zhixiong Li et al.

ENERGY (2020)

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Article Thermodynamics

An analysis tool of the rocket-based combined cycle engine and its application in the two-stage-to-orbit mission

Tiantian Zhang et al.

ENERGY (2020)

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Article Engineering, Aerospace

Numerical investigation on implication of strut profile on combustion characteristics in a cavity based scramjet combustor

Lakka Suneetha et al.

ACTA ASTRONAUTICA (2020)

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Article Thermodynamics

Proper orthogonal decomposition analysis of near-field coherent structures associated with V-notched nozzle jets

H. D. Lim et al.

EXPERIMENTAL THERMAL AND FLUID SCIENCE (2020)

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Article Chemistry, Physical

Implication of diamond shaped dual strut on combustion characteristics in a cavity-based scramjet combustor

Lakka Suneetha et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

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Article Mechanics

Screech characteristics of under-expanded high aspect ratio elliptic jet

A. Nageswara Rao et al.

PHYSICS OF FLUIDS (2020)

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Article Chemistry, Physical

Assessment on the supersonic combustor performance induced by the asymmetric struts with hydrogen fuel

Chunlei Li et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

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Article Engineering, Aerospace

Numerical investigation on flow and mixing characteristics inside a converging-diverging mixing duct of rocket-based combined-cycle engine in ejector mode

Zeyu Dong et al.

AEROSPACE SCIENCE AND TECHNOLOGY (2020)

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Article Chemistry, Physical

Supersonic combustion of hydrogen using an improved strut injection scheme

S. Aravind et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

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Article Thermodynamics

Numerical investigation on the performance of scramjet combustor with a novel strut configuration

Chunlei Li et al.

APPLIED THERMAL ENGINEERING (2019)

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Article Chemistry, Physical

Role of the backward-facing steps at two struts on mixing and combustion characteristics in a typical strut-based scramjet with hydrogen fuel

Chunlei Li et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

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Article Green & Sustainable Science & Technology

Dynamic mode decomposition of cavitating flow around ALE 15 hydrofoil

Ming Liu et al.

RENEWABLE ENERGY (2019)

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Article Engineering, Aerospace

Investigation on the performance and feasibility of RBCC-based access-tospace via multi-objective design optimization

Philipp Mink et al.

ACTA ASTRONAUTICA (2019)

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Article Chemistry, Physical

Numerical investigation on implication of dual cavity on combustion characteristics in strut based scramjet combustor

Lakka Suneetha et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

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Article Chemistry, Physical

Numerical investigation of wavy wall strut fuel injector for hydrogen fueled scramjet combustor

Obula Reddy Kummitha et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

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Review Thermodynamics

A systematic literature review based on different fuel injection strategies used in scramjet combustors

Santhosh K. Gugulothu

HEAT TRANSFER-ASIAN RESEARCH (2019)

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Article Engineering, Aerospace

Effect of different wall injection schemes on the flow-field of hydrogen fuelled strut-based scramjet combustor

Gautam Choubey et al.

ACTA ASTRONAUTICA (2018)

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Article Engineering, Aerospace

Zonal Hybrid Reynolds-Averaged Navier-Stokes/Large-Eddy Simulation of a Hydrogen-Fueled Scramjet Combustor

Junsu Shin et al.

AIAA JOURNAL (2018)

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Article Mechanics

Role of jet spacing and strut geometry on the formation of large scale structures and mixing characteristics

Rahul Kumar Soni et al.

PHYSICS OF FLUIDS (2018)

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Article Mechanics

Investigation of mixing characteristics in strut injectors using modal decomposition

Rahul Kumar Soni et al.

PHYSICS OF FLUIDS (2018)

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Article Engineering, Mechanical

Signatures of shear-layer unsteadiness in proper orthogonal decomposition

Joel L. Weightman et al.

EXPERIMENTS IN FLUIDS (2018)

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Article Thermodynamics

DMD and POD of time-resolved schlieren on a multi-stream single expansion ramp nozzle

Matthew G. Berry et al.

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW (2017)

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Article Chemistry, Physical

Numerical analysis of hydrogen fuel scramjet combustor with turbulence development inserts and with different turbulence models

Obula Reddy Kummitha

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2017)

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Article Chemistry, Physical

Numerical analysis of scramjet combustor with innovative strut and fuel injection techniques

Obula Reddy Kummitha et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2017)

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Article Chemistry, Physical

Numerical analysis of passive techniques for optimizing the performance of scramjet combustor

Obula Reddy Kummitha

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2017)

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Article Chemistry, Physical

Effect of parametric variation of strut layout and position on the performance of a typical two-strut based scramjet combustor

Gautam Choubey et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2017)

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Article Chemistry, Physical

Effect of different strut plus wall injection techniques on the performance of two-strut scramjet combustor

Gautam Choubey et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2017)

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Review Engineering, Aerospace

Modal Analysis of Fluid Flows: An Overview

Kunihiko Taira et al.

AIAA JOURNAL (2017)

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A rocket-based combined-cycle engine prototype demonstrating comprehensive component compatibility and effective mode transition

Lei Shi et al.

ACTA ASTRONAUTICA (2016)

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Article Chemistry, Physical

Effect of variation of angle of attack on the performance of two-strut scramjet combustor

Gautam Choubey et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2016)

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Article Chemistry, Physical

Investigation on the effects of operating variables on the performance of two-strut scramjet combustor

Gautam Choubey et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2016)

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Article Engineering, Aerospace

Large eddy simulation of a hydrogen-fueled scramjet combustor with dual cavity

Hongbo Wang et al.

ACTA ASTRONAUTICA (2015)

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Article Chemistry, Physical

IDDES simulation of hydrogen-fueled supersonic combustion using flamelet modeling

Haosu Wang et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2015)

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Article Chemistry, Physical

Maximum thrust for the rocket-ejector mode if the hydrogen fueled rocket-based combined cycle engine

Qingchun Yang et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2015)

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Article Engineering, Mechanical

Investigation on the effect of strut configurations and locations on the combustion performance of a typical scramjet combustor

Wei Huang

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY (2015)

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Article Engineering, Aerospace

Supersonic Combustion and Flame Stabilization of Coflow Ethylene and Air with Splitter Plate

Liwei Zhang et al.

JOURNAL OF PROPULSION AND POWER (2015)

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Article Engineering, Aerospace

Thermochemical exploration of hydrogen combustion in generic scramjet combustor

Malsur Dharavath et al.

AEROSPACE SCIENCE AND TECHNOLOGY (2013)

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Article Engineering, Mechanical

Integration of non-time-resolved PIV and time-resolved velocity point sensors for dynamic estimation of velocity fields

Jonathan H. Tu et al.

EXPERIMENTS IN FLUIDS (2013)

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Article Thermodynamics

Characteristics of Oscillations in Supersonic Open Cavity Flows

Hongbo Wang et al.

FLOW TURBULENCE AND COMBUSTION (2013)

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Article Chemistry, Physical

Combustion modes of hydrogen jet combustion in a cavity-based supersonic combustor

Hongbo Wang et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2013)

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Article Engineering, Aerospace

Effect of geometric parameters on the drag of the cavity flameholder based on the variance analysis method

Wei Huang et al.

AEROSPACE SCIENCE AND TECHNOLOGY (2012)

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Article Mechanics

Applications of the dynamic mode decomposition

P. J. Schmid et al.

THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS (2011)

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Simulation of Turbulent Mixing Behind a Strut Injector in Supersonic Flow

Franklin Genin et al.

AIAA JOURNAL (2010)

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Article Mechanics

Dynamic mode decomposition of numerical and experimental data

Peter J. Schmid

JOURNAL OF FLUID MECHANICS (2010)

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Article Engineering, Aerospace

Experimental Study of Cavity-Strut Combustion in Supersonic Flow

K. -Y. Hsu et al.

JOURNAL OF PROPULSION AND POWER (2010)

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Article Engineering, Aerospace

Numerical Simulation of Supersonic Nonpremixed Turbulent Combustion in a Scramjet Combustor Model

Arnaud Mura et al.

JOURNAL OF PROPULSION AND POWER (2010)

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Article Thermodynamics

Investigation of the effect of chemistry models on the numerical predictions of the supersonic combustion of hydrogen

K. Kumaran et al.

COMBUSTION AND FLAME (2009)

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Article Thermodynamics

Combustion characteristics of a dual-mode scramjet combustor with cavity flameholder

Daniel J. Micka et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2009)

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Article Engineering, Aerospace

Numerical investigation of mixing and combustion enhancement in supersonic combustors by strut induced streamwise vorticity

Peter Gerlinger et al.

AEROSPACE SCIENCE AND TECHNOLOGY (2008)

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Article Thermodynamics

A hybrid RANS-LES approach with delayed-DES and wall-modelled LES capabilities

Mikhail L. Shur et al.

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW (2008)

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Article Engineering, Aerospace

Flame characteristics in supersonic combustor with hydrogen injection upstream of cavity flameholder

Ming-Bo Sun et al.

JOURNAL OF PROPULSION AND POWER (2008)

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Article Engineering, Aerospace

Numerical investigation of turbulent hydrogen combustion in a SCRAMJET using flamelet modeling

M Oevermann

AEROSPACE SCIENCE AND TECHNOLOGY (2000)

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Modal analysis of mixing characteristics in scramjet combustor with passive struts

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