☆ 4.7 Article

Research on the radiation scaling criteria of film-cooled gas turbines

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2023)

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 Thermodynamics

Enhanced film cooling and flow disturbance of an AGTB turbine cascade with plasma aerodynamic actuation at film-holes outlets

Jie Sun et al.

Summary: Numerical simulations were conducted to investigate the effects of plasma actuators on film cooling enhancement and flow characteristics around film holes. The results showed that opening the plasma actuators reduced the backflow region and the intensity and scale of vortices. The applied voltage affected the flow attachment location and the height of the coolant air, and the plasma injection increased the turbulent kinetic energy near the wall. The film cooling effectiveness increased significantly on the pressure side and had minimal effect on the suction side. The sensitivity of the applied voltage decreased with increasing blowing ratio.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2023)

添加到收藏夹

Article Thermodynamics

Multi-objective performance optimization of target surface of bionic blue whale-skin impinged by array jet

Liang Xu et al.

Summary: This study proposes a new array impingement bionic target surface cooling structure based on the blue whale skin structure, and numerically simulated its flow and heat transfer characteristics under high Reynolds number and high heat flux density conditions. The bionic structure is optimized using a response surface approximation model and a non-inferior sequencing genetic algorithm, and the performance of the optimized structure is tested. The results show that the optimized bionic groove structure increases the average Nusselt number, flow friction factor, and comprehensive thermal coefficient compared to the plane target surface. The proposed structure and optimization method provide a certain reference for designing new efficient cooling structures for heavy-duty gas turbines combustor liners.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2023)

添加到收藏夹

Article Thermodynamics

Investigation on hybrid thermal features of aero- engines from combustor to turbine

Tianyi Wang et al.

Summary: The thermal interaction between the combustor and the turbine has significant effects on the performance of an aero-engine. This study proposes an integrated numerical simulation approach to investigate the thermal distribution in a combustor-guide vane-rotating blade combined structure. The results provide insights into the complex aero-thermal physics relevant to aero-engine design and analysis.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2023)

添加到收藏夹

Article Thermodynamics

A transfer learning method to assimilate numerical data with experimental data for effusion cooling

Hongqian Yu et al.

Summary: A transfer learning method based on an iterative neural operator was proposed to integrate numerical data with experimental data for effusion cooling. The results showed that this method could accurately capture the nonlinear characteristics of effusion and predict the local effusion cooling effectiveness with high quality. Transfer learning significantly reduced the requirements for training samples and training epochs compared to direct machine learning approach, while reducing the errors for experimental and literature datasets.

APPLIED THERMAL ENGINEERING (2023)

添加到收藏夹

Article Thermodynamics

Correction formula for film-cooling effectiveness considering the influence of thermal radiation in high-temperature environments

Meng Wang et al.

Summary: This study developed a physics-based empirical correlation to correct the film-cooling effectiveness scaling criteria by considering the influence of thermal radiation. The empirical correlation took into account the parameters such as gas-to-cold-air temperature ratio and emissivity, resulting in a more accurate prediction of film-cooling effectiveness in high-temperature environments. This research provides an important theoretical foundation for improving the design accuracy of turbine blades.

APPLIED THERMAL ENGINEERING (2023)

添加到收藏夹

Article Thermodynamics

Heat transfer enhancement by inserting a radiation enhancement plate in turbine blade internal cooling channel

Jie Liu et al.

Summary: A novel method is proposed to enhance heat transfer in a turbine blade internal cooling channel by inserting a radiation enhancement plate. Numerical investigations reveal that the model with a radiation enhancement plate roughed with W-shaped ribs exhibits the highest cooling performance. The method shows excellent self-enhancement effect and significantly reduces the heat transfer difference between the leading and trailing walls.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2023)

添加到收藏夹

Article Thermodynamics

Impact of thermal radiation on turbine blades with film cooling structures

Haiwang Li et al.

Summary: In this study, a method for separating the contribution of radiative heat flow from the total heat flow in turbine blades with different film-cooling structures is proposed. The effect of film hole angle on the proportion of radiative heat flow is studied, and the radiative heat flow is estimated accurately. Computational fluid dynamics (CFD) simulation data verify the reliability of the method, showing that the radiative heat flow curve decreases as the fourth power of temperature. Future research should focus on the impact of thermal radiation in blade heat transfer design.

APPLIED THERMAL ENGINEERING (2023)

添加到收藏夹

Article Thermodynamics

Coupled aerothermal-mechanical analysis in single crystal double wall transpiration cooled gas turbine blades with a large film hole density

Matthew Courtis et al.

Summary: Increasing gas turbine efficiency requires advancements in turbine blade cooling technology. Double wall transpiration cooling (DWTC) offers enhanced thermal protection with modest coolant flows. This paper investigates a transpiration cooled double wall turbine blade design using computational fluid dynamics, heat transfer theory, and stress analysis. The study finds that a system with high porosity displays improved cooling effectiveness and reduces thermal stresses compared to systems with modest outer wall porosity.

APPLIED THERMAL ENGINEERING (2023)

添加到收藏夹

Review Engineering, Aerospace

A review of cooling technologies for high temperature rotating components in gas turbine

Umesh Unnikrishnan et al.

Summary: The present work reviews the current state of cooling technology research for modern gas turbines. It covers modeling and simulation, experiments and diagnostics, and cooling technologies for blades and disks. The RANS approach is commonly used for numerical simulation, while advanced instrumentation and rotating-flow test facilities have been developed for measurement and diagnostics. Cooling technologies have been improved through optimized designs and novel methods.

PROPULSION AND POWER RESEARCH (2022)

添加到收藏夹

Article Thermodynamics

Impact of radiative heat flux on turbine blade heat transfer in high temperature environments

Haiwang Li et al.

Summary: This study proposes a novel experimental method to distinguish thermal radiation from total heat flux and validates the importance of radiation in heat transfer of turbine blades.

APPLIED THERMAL ENGINEERING (2022)

添加到收藏夹

Article Thermodynamics

Scaling criteria accuracy for turbine blade film cooling effectiveness at unmatched temperature ratio conditions

Weicheng Zhao et al.

Summary: Cooling performance experiments for turbine blades are increasingly being conducted at low temperature and pressure conditions, and the study explores suitable scaling criterion to reduce deviations in the experimental results. The research reveals variations in film cooling effectiveness under different conditions and emphasizes the importance of applying appropriate scaling criteria to adjust experimental results.

APPLIED THERMAL ENGINEERING (2021)

添加到收藏夹

Article Thermodynamics

Two-dimensional film-cooling effectiveness prediction based on deconvolution neural network

Yaning Wang et al.

Summary: A theoretical model using Deconvolutional Neural Network (Deconv NN) was developed to establish the correlation between coolant jet parameters and surface temperature distribution, achieving better performance and robustness compared to existing methods.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

添加到收藏夹

Article Thermodynamics

Numerical and experimental study of scaling criteria accuracy for film cooling using CO2 coolant

Weicheng Zhao et al.

Summary: This study investigates the accuracy of six criteria for the film cooling effectiveness scaling when changing the coolant from air to CO2, and finds that the application of CO2 coolant leads to a significant reduction of cooling effectiveness at relatively low coolant mass flow rate, which almost disappears at high coolant mass flow rate. The study also shows that VR criterion has the highest accuracy in the scaling from air to CO2, with a cooling effectiveness deviation lower than 3% at all coolant CO2 percentages.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

添加到收藏夹

Article Thermodynamics

Effect and optimization of backward hole parameters on film cooling performance by Taguchi method

Jin Wang et al.

ENERGY CONVERSION AND MANAGEMENT (2020)

添加到收藏夹

Article Thermodynamics

Large eddy simulation of compressible, shaped-hole film cooling

Todd A. Oliver et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2019)

添加到收藏夹

Article Thermodynamics

Structure analysis of adiabatic film cooling effectiveness in the near field of a single inclined jet: Measurement using fast-response pressure-sensitive paint

Ali Rahimi Khojasteh et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2017)

添加到收藏夹

Article Thermodynamics

Effect of Variable Properties and Radiation on Convective Heat Transfer Measurements at Engine Conditions

Nathan J. Greiner et al.

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME (2016)

添加到收藏夹

Article Engineering, Mechanical

Minimization of Heat Load Due to Secondary Reactions in Fuel Rich Environments

Andrew T. Shewhart et al.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2015)

添加到收藏夹

Article Thermodynamics

An experimental study of density ratio effects on the film cooling injection from discrete holes by using Ply and PSP techniques

Blake Johnson et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2014)

添加到收藏夹

Article Engineering, Mechanical

Effect of Variable Properties Within a Boundary Layer With Large Freestream-to-Wall Temperature Differences

Nathan J. Greiner et al.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2014)

添加到收藏夹

Article Engineering, Mechanical

Effects of varying Reynolds number, blowing ratio, and internal geometry on trailing edge cutback film cooling

Michael J. Benson et al.

EXPERIMENTS IN FLUIDS (2012)

添加到收藏夹

Article Thermodynamics

Computational study of film cooling from single and two staggered rows of novel semi-circular cooling holes including coolant plenum

F. H. Asghar et al.

ENERGY CONVERSION AND MANAGEMENT (2011)

添加到收藏夹

Article Engineering, Mechanical

A Film-Cooling Correlation for Shaped Holes on a Flat-Plate Surface

Will F. Colban et al.

JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME (2011)

添加到收藏夹

Article Thermodynamics

Effects of pressure gradient on film cooling effectiveness from two rows of simple and compound angle holes in combination

BY Maiteh et al.

ENERGY CONVERSION AND MANAGEMENT (2004)

添加到收藏夹

Article Optics

Evaluation of the Planck-mean absorption coefficients from HITRAN and HITEMP databases

HM Zhang et al.

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER (2002)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.