Investigation on the Flow and Heat Transfer Behavior of a New Composite Internal Cooling Model

doi:10.7652/xjtuxb201805016

您当前的位置：

首页 >

文章列表页 >

Investigation on the Flow and Heat Transfer Behavior of a New Composite Internal Cooling Model

更新时间：2025-07-09

- Investigation on the Flow and Heat Transfer Behavior of a New Composite Internal Cooling Model
- Vol. 52, Issue 5, Pages: 108-115(2018)
- 作者机构：
  
  1. 西安交通大学叶轮机械研究所,西安,710049
  2. 陕西省叶轮机械及动力装备工程实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201805016
  CLC： TK263.3
- Online First：10 May 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
Investigation on the Flow and Heat Transfer Behavior of a New Composite Internal Cooling Model[J]. 2018, 52(5): 108-115.
DOI：

Investigation on the Flow and Heat Transfer Behavior of a New Composite Internal Cooling Model[J]. 2018, 52(5): 108-115. DOI： 10.7652/xjtuxb201805016.

摘要

为了研究不同冷却结构对叶片前缘冷却性能的影响

探究综合性能更为优越的冷却结构

建立了旋流冷却、冲击冷却和旋流与冲击冷却相结合的新型冷却模型

在相同的进气腔、喷嘴数及位置、旋流腔和气动条件下进行了数值研究

对旋流冷却、冲击冷却和新型冷却模型的综合换热性能进行了对比分析

并探究了不同雷诺数下组合冷却的换热性能、冷气分配和压降的变化规律。研究结果表明:旋流与冲击冷却相结合的冷却方式综合换热性能最佳

其综合换热系数相较于旋流冷却提高了0.2%

相较于冲击冷却提高了12.5%

其压力损失低于纯旋流冷却和纯冲击冷却; 在旋流与冲击冷却相结合的冷却中

随着雷诺数的增加

努塞尔数得到显著提升。由于上游冲击冷却气与主流的相互碰撞

削弱了主流流速

加之上游顺时针涡旋向下游的发展

使得冷却腔室末端位置的换热性能得到增强。在旋流与冲击冷却相结合的冷却中

旋流冷却部分产生的涡旋对下游的影响较强

抵抗上游的横流能力较高

旋流冷却与冲击冷却的相互作用能够产生一个大尺度对涡和单涡旋; 冷气分配不随雷诺数变化

流经冲击喷嘴的冷气较少。

Abstract

Influences of different cooling models on blade cooling were investigated

including swirl cooling

impingement cooling and composite cooling

in order to seek for more superior cooling models. The thermal performance of these cooling models was numerically compared under the conditions of same inlet chamber

same number and location of jet nozzles

same swirl chamber and aerodynamic parameters. Moreover

for the new type of composite cooling model

the effects of Reynolds number on the heat transfer performance

the cooling air allocation and the pressure drop were studied. Results indicate that this composite cooling has the highest thermal performance coefficient

i.e.

0.2% and 12.5% higher than that of swirling cooling and impingement cooling

respectively. Its heat transfer performance is slightly lower than swirl cooling and its pressure drop is the lowest among the three cooling models. As the Reynolds number increases

the Nusselt number will significantly rise. At the swirl chamber tip

the heat transfer performance is enhanced because the upstream impingement cooling air impacts the mainstream and decreases the velocity of mainstream. In addition

the upstream clockwise vortex develops along the downstream direction and enhances the heat transfer performance at the swirling chamber tip. The vortices produced by swirl cooling have dramatic effects on the downstream flow structure and have strong resistance against upstream flow. The interaction between swirl cooling and impingement cooling can produce a large-scale vortex pair and single vortex. The cooling air allocation remains stable under different Reynolds numbers. The proportion of cooling air flowing through the impingement jet nozzle is the lowest among all jet nozzles.

关键词

Keywords

references

KREITH F, MARGOLIS D. Heat transfer and friction in turbulent vortex flow [J]. Applied Scientific Research, 1959, 8(1): 457-473.

KREITH F, SONJU O K. The decay of a turbulent swirl in a pipe [J]. Journal of Fluid Mechanics, 1965, 22(2): 257-271.

KITOH O. Experimental study of turbulent swirling flow in a straight pipe [J]. Journal of Fluid Mechanics, 1991, 225: 445-479.

LIGRANI P M, HEDLUND C R, BABINCHAK B T, et al. Flow phenomena in swirl chambers [J]. Experiments in Fluids, 1998, 24(3): 254-264.

LIU Zhao, LI Jun, FENG Zhenping, et al. Numerical study on the effect of jet nozzle aspect ratio and jet angle on swirl cooling in a model of a turbine blade leading edge cooling passage [J]. International Journal of Heat and Transfer, 2015, 90: 986-1000.

LIU Zhao, LI Jun, FENG Zhenping. Numerical study on the effect of jet spacing on the swirl flow and heat transfer in the turbine airfoil leading edge region [J]. Numerical Heat Transfer: Part A Applications, 2016, 70(9): 980-984.

LIU Zhao, LI Jun, FENG Zhenping. Numerical study on the effect of jet slot height on flow and heat transfer of swirl cooling in leading edge model for gas turbine blade [C]∥ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. New York, USA: ASME, 2013: V03AT12A029.

MIAO Jr-ming, WU Chen-yuan, CHEN Ping-hei, et al. Numerical investigation of confined multiple-jet impingement cooling over a flat plate at different crossflow orientations [J]. Numerical Heat Transfer: Part A, 2009, 55: 1019-1050.

LEE J, REN Z, LIGRANI P, et al. Crossflows from jet array impingement cooling: hole spacing, target plate distance, Reynolds number effects [J]. International Journal of Thermal Sciences, 2015, 88: 7-18.

FAN Xiaojun, DU Changhe, LI Liang, et al. Numerical simulation on effects of film hole geometry and mass flow on vortex cooling behavior for gas turbine blade leading edge [J]. Applied Thermal Engineering, 2017, 112: 472-483.

杜长河, 范小军, 李亮, 等. 抽吸孔对旋流和冲击冷却流动换热特性的影响 [J]. 西安交通大学学报, 2017, 51(1): 19-24.

DU Changhe, FAN Xiaojun, LI Liang, et al. Comparative analysis for bleed hole influences on flow and heat transfer behaviors of vortex and impingement cooling [J]. Journal of Xi'an Jiaotong University, 2017, 51(1): 19-24.

范小军, 杜长河, 李亮, 等. 4种冷却结构对叶片前缘流动换热影响的比较研究 [J]. 西安交通大学学报, 2017, 51(7): 37-43.

FAN Xiaojun, DU Changhe, LI Liang, et al. Comparative analysis for flow and heat transfer behavior of blade leading edge among four cooling structures [J]. Journal of Xi'an Jiaotong University, 2017, 51(7): 37-43.

DU Changhe, LI Liang, LI Sen, et al. Effects of aerodynamic parameters on steam vortex cooling behavior for gas turbine blade leading edge [J]. Journal of Power and Energy, 2016, 230(4): 354-365.

HEDLUND C R, LIGRANI P M, GLEZER B, et al. Heat transfer in a swirl chamber at different temperature ratios and Reynolds numbers [J]. International Journal of Heat and Mass Transfer, 1999, 42(22): 4081-4091.

HEDLUND C R, LIGRANI P M, MOON H K, et al. Heat transfer and flow phenomena in a swirl chamber simulating turbine blade internal cooling [J]. Journal of Turbomachinery, 1999, 121(4): 804-813.

HEDLUND C R, LIGRANI P M. Local swirl chamber heat transfer and flow structure at different Reynolds numbers [J]. Journal of Turbomachinery, 2000, 122(2): 375-385.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical Study on Deflected Internal Flow and Heat Transfer and Cooling Characteristics of Curved Double-Wall Structures with Pin-Fins

Numerical Investigation of Internal and External Flow Interaction and Overall Cooling Characteristics of Curvature Double-Wall Structures

Effect of Plug Structure on the Flow and Heat Transfer Characteristics of Swirl Cooling

Numerical Study on the Deflected Flow and Heat Transfer and Cooling Characteristics of Curved Double-Wall Structures with Pin-Fins

Optimization and Validation of Jet Hole Shapes for Jet Impingement Cooling in Gas Turbines

Related Author

LI Jun

LI Zhigang

ZHANG Kaiyuan

BAI Bo

QUAN Shuaiyu

LI Jun

LI Zhigang

LI Zhiyu

Related Institution

西安交通大学叶轮机械研究所，710049，西安Institute of Turbomachinery, Xi'an Jiaotong University, Xi'an 710049, China

School of Energy and Power Engineering, Xi'an Jiaotong University

Xi'an Thermal Power Research Institute Co, Ltd

Institute of Turbomachinery, Xi’an Jiaotong University

Shanghai Turbine Works Co., Ltd.

⁰