Effect of Bleed Hole Location on Vortex Cooling Flow and Heat Transfer Performance

doi:10.7652/xjtuxb201607006

您当前的位置：

首页 >

文章列表页 >

Effect of Bleed Hole Location on Vortex Cooling Flow and Heat Transfer Performance

更新时间：2025-07-09

- Effect of Bleed Hole Location on Vortex Cooling Flow and Heat Transfer Performance
- Vol. 50, Issue 7, Pages: 32-38(2016)
- 作者机构：
  
  西安交通大学叶轮机械研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201607006
  CLC： TK474.7
- Online First：10 July 2016，
  
  Published：2016
- 稿件说明：
移动端阅览
Effect of Bleed Hole Location on Vortex Cooling Flow and Heat Transfer Performance[J]. 2016, 50(7): 32-38.
DOI：

Effect of Bleed Hole Location on Vortex Cooling Flow and Heat Transfer Performance[J]. 2016, 50(7): 32-38. DOI： 10.7652/xjtuxb201607006.

摘要

为了研究气膜孔几何位置对旋流冷却特性的影响

建立了带有气膜孔的旋流腔冷却结构

利用流体动力学软件ANSYS CFX对比分析了有无气膜孔情况下旋流冷却性能的差异

并研究了气膜孔轴宽比和周向角度对旋流冷却流动和换热特性的影响。研究结果表明:气膜孔对旋流腔靶面旋流冷气运动产生强烈扰动

使气膜孔上游冷气流速增加

下游冷气流速降低; 气膜孔使主流流线向斜下方偏转

增强了整体换热强度且整体压力分布趋于均匀; 轴宽比从0.3增加到0.7

气膜孔对整体流动和传热影响不大

轴宽比增加到0.9

主流小旋涡消失且靶面Nu分布更均匀; 周向角度小于0°时

随着周向角度的增加

气膜孔上游高速区增大

周向角度超过0°后

高速区随周向角度增长不明显; 随着周向角度增加

周向平均压力系数增加

气膜孔附近高Nu区扩大

靶面高Nu区分布更均匀。

Abstract

A vortex chamber model with bleed holes was established to study the effect of bleed hole location on vortex cooling characteristics. The hydrodynamics software ANSYS CFX was used to investigate the difference between vortex cooling systems with and without bleed holes. Detailed analysis was conducted to explore the influences of bleed hole's axis-width ratio and circumferential angle on vortex cooling aerodynamic and thermal behaviors. Results revealed that bleed holes could produce strong disturbance on the cooling air rotational flow

thus increasing the upstream velocity of bleed holes while decreasing the downstream velocity. Bleed holes drive the mainstream deflecting towards the slanting downward direction

enhancing the overall heat transfer intensity and inducing more uniform pressure distribution. When the axis-width ratio increases from 0.3 to 0.7

bleed holes have slight effects on the overall flow and heat transfer performance. However

when the axis-width ratio reaches 0.9

the small mainstream vortexes disappear and the region with high Nu(Nusselt number)becomes more uniform. When the circumferential angle is smaller than 0°

an increase in circumferential angle leads to an obvious increase in high speed region of upstream bleed holes. However

this increasing tendency turns weaker when the circumferential angle is larger than 0°. As circumferential angle increases

the circumferential average pressure ratio and high-Nu region near the bleed holes both increase

and the distribution of high-Nu region becomes more uniform.

关键词

Keywords

references

GLEZER B, MOON H K, O'CONNELL T. A novel technique for the internal blade cooling [C]∥Proceedings of ASME Turbo Expo 1996. New York, USA: ASME, 1996: V004T09A015.

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

DU C, LI L, WU X, et al. Effect of jet nozzle geometry on flow and heat transfer performance of vortex cooling for gas turbine blade leading edge [J]. Applied Thermal Engineering, 2015, 93: 1020-1032.

杜长河, 范小军, 李亮, 等. 喷嘴长宽比和雷诺数对旋流冷却流动与传热特性的影响 [J]. 西安交通大学学报, 2015, 49(12): 124-129.

DU Changhe, FAN Xiaojun, LI Liang, et al. Effects of jet nozzle aspect ratio and Reynolds number on flow and heat transfer characteristics of vortex cooling [J]. Journal of Xi'an Jiaotong University, 2015, 49(12): 124-129.

HAY N, WEST P D. Heat transfer in free swirling flow in a pipe [J]. Journal of Heat Transfer, 1975, 97(3): 411-416.

HEDLUND C R, LIFRANI 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.

LIU Z, LI J, FENG Z. 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.

AL-ZURFI N, TURAN A, NASSER A. Numerical investigation of rotation effects on anti-vortex film-cooling holes [J]. Flow, Turbulence and Combustion, 2016, 96(1): 133-162.

GRAF L, KLEISER L. Flow-field analysis of anti-kidney vortex film cooling [J]. Journal of Thermal Science, 2012, 21(1): 66-76.

SHEN Zhongyang, QU Huancheng, ZHANG Di, et al. Effect of bleed hole on flow and heat transfer performance of U-shaped channel with dimple structure [J]. International Journal of Heat and Mass Transfer, 2013, 66: 10-22.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effects of Jet Nozzle Aspect Ratio and Reynolds Number on Flow and Heat Transfer Characteristics of Vortex Cooling

Comparative Analysis for Bleed Hole Influences on Flow and Heat Transfer Behavior of Vortex and Impingement Cooling

Influences of Rotating Radius and Blade Setting Angle on Rotor Vortex Cooling Flow and Heat Transfer Characteristics

Comparative Analysis for Flow and Heat Transfer Behavior of Blade Leading Edge among Four Cooling Structures

Effects of Nozzle Numbers and Temperature Ratios on Flow and Heat Transfer Characteristics of Vortex Cooling

Related Author

丰镇平

李亮 2

邹佳生 1

杜长河 1

范小军 1

李亮 2

周源远 1

邹佳生 1

Related Institution

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

Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment

⁰