上游横向间断肋布置方式对气膜冷却性能的影响

郑达仁 1; 王新军 1; 张峰 1; 2; 袁奇 1; 2

doi:10.7652/xjtuxb201711002

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上游横向间断肋布置方式对气膜冷却性能的影响

更新时间：2025-07-09

- 上游横向间断肋布置方式对气膜冷却性能的影响
- Effect of Arrangement for Upstream Divided Ramps on Film Cooling Performance
- 西安交通大学学报 2017年51卷第11期页码：7-13
- 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/xjtuxb201711002
  中图分类号： TK263
- 网络首发：2017-11-10，
  
  纸质出版：2017
- 稿件说明：
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郑达仁 1, 王新军 1, 张峰 1, 等. 上游横向间断肋布置方式对气膜冷却性能的影响[J]. 西安交通大学学报, 2017,51(11):7-13.

Effect of Arrangement for Upstream Divided Ramps on Film Cooling Performance[J]. 2017, 51(11): 7-13.
郑达仁 1, 王新军 1, 张峰 1, 等. 上游横向间断肋布置方式对气膜冷却性能的影响[J]. 西安交通大学学报, 2017,51(11):7-13. DOI： 10.7652/xjtuxb201711002.

Effect of Arrangement for Upstream Divided Ramps on Film Cooling Performance[J]. 2017, 51(11): 7-13. DOI： 10.7652/xjtuxb201711002.

摘要

为了采用气膜冷却来保护燃气轮机叶片免受高温侵蚀

针对进一步提高气膜冷却效率、减少冷却空气消耗量的需求

提出了带有上游间断肋的气膜冷却结构。采用k-ε湍流模型数值研究了带有上游横向肋结构的气膜冷却性能

分析了横向无间断肋、两侧间断肋、间断数段肋和中间间断肋这4种上游不同横向肋布置方式对气膜冷却流动的影响

比较了4种结构的气膜冷却效率和换热系数。结果表明:横向肋对下游冷气的卷吸能力与肋片长度有关

与肋片的布置方式无关; 不同肋片布置方式会产生不同的涡结构

即中心间断肋会诱导主流产生一个与肾形涡旋转方向相反的涡对

从而增加冷却射流的展向扩散

有利于提高下游气膜冷却性能

而两端间断肋会诱导主流产生一个与肾形涡旋转方向相同的涡对

该涡对会进一步抬离冷却射流

降低下游气膜冷却性能; 在气膜孔上游布置中心间断肋能提供最高的展向平均绝热气膜冷却效率和实际热降值。

Abstract

To protect the gas turbine blades suffering from the hot gas by adapting the film cooling technology

a novel film cooling geometry with an upstream ramp is proposed in view of the requirement for further increasing adiabatic film cooling effectiveness and decreasing expense of coolant. The performance of film cooling with upstream ramps is numerically investigated with k-ε turbulence model. The effects of arrangement for four different ramps

including the undivided ramp

the ramp divided in the lateral sides

the ramp divided in several positions and the ramp divided in the center

on flow structures are analyzed. The adiabatic film cooling effectiveness and heat transfer coefficient of these four film cooling geometries are compared. The results show that the intensity of entrainment is sensitive to the length of ramp and is independent on the ramp arrangements. Different vortex structures are induced due to the different arrangement for ramps. The ramp divided in the center region generates a pair of vortexes which rotates in the opposite direction with the kidney vortexes

and this pair of vortexes contributes to the lateral spreading of coolant

which increases the film cooling performance. The ramp divided on both sides generates a pair of vortexes which rotates in the same direction with the kidney vortexes

and this pair of vortexes lifts off the coolant further

which increases the film cooling performance. The highest adiabatic film cooling effectiveness in the spanwise direction and the highest NHFR(net heat flux reduction)are observed in the case of the ramp divided in the center.

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references

KELSO R M, LIM T T, PERRY A E. An experimental study of round jets in cross-flow [J]. Journal of Fluid Mechanics, 1996, 306: 111-144.

NA S, SHIH T I P. Increasing adiabatic film-cooling effectiveness by using an upstream ramp [J]. ASME Journal of Heat Transfer, 2007, 129(4): 464-471.

HAMMAMI Z, AZZI A, DELLIL S A, et al. Improving adiabatic film-cooling effectiveness by using an upstream pyramid [J]. Computational Thermal Sciences: An International Journal, 2016, 8l: 135-146.

HALDER P, SAMAD A. Enhancement of film cooling effectiveness using upstream ramp [C]∥ASME 2012 Gas Turbine. New York, USA: ASME, 2012: 551-557.

MONTOMOLI F, D'AMMARO A, UCHIDA S. Numerical and experimental investigation of a new film cooling geometry with high P/D ratio [J]. International Journal of Heat and Mass Transfer, 2013, 66: 366-375.

ELWEKEEL F N M, ABDALA A M M, HUANG D. Upstream and downstream step curvature effects on film cooling effectiveness and flow structures [J]. Arabian Journal for Science and Engineering, 2015, 40(12): 3697-3707.

ABDALA A M M, ELWEKEEL F N M. An influence of novel upstream steps on film cooling performance [J]. International Journal of Heat and Mass Transfer, 2016, 93: 86-96.

ZHANG F, WANG X, LI J. The effects of upstream steps with unevenly spanwise distributed height on rectangular hole film cooling performance [J]. International Journal of Heat and Mass Transfer, 2016, 102: 1209-1221.

CHEN S P, CHYU M K, SHIH T I P. Effects of upstream ramp on the performance of film cooling [J]. International Journal of Thermal Sciences, 2011, 50(6): 1085-1094.

BARIGOZZI G, FRANCHINI G, PERDICHIZZI A. The effect of an upstream ramp on cylindrical and fan-shaped hole film cooling: part ii-adiabatic effectiveness results [C]∥ASME Turbo Expo 2007: Power for Land, Sea, and Air. New York, USA: ASME, 2007: 115-123.

徐亮,兰进,高建民,等.一种类螺纹孔结构的旋转射流换热特性数值模拟.2017,51(9):11-18.[doi:10.7652/xjtuxb 201709002]

席雷,徐亮,高建民,等.蒸汽冷却厚壁通道传热性能的耦合传热研究.2017,51(9):32-38.[doi:10.7652/xjtuxb201709 005]

翟颖妮,刘存良.高主流湍流度下大倾角异型气膜孔冷却特性实验研究.2017,51(7):16-23.[doi:10.7652/xjtuxb2017 07003]

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.2017,51(7):37-43.[doi:10,7652/xjtuxb201707006]

李劲劲,何坤,晏鑫,等.透平叶片近前缘端壁处换热性能的研究.2017,51(7):44-50.[doi:10.7652/xjtuxb201707007]

黄琰,晏鑫,何坤,等.压力面侧小翼结构对凹槽叶顶冷却传热性能的影响.2017,51(7):51-56.[doi:10.7652/xjtuxb 201707008]

费昕阳,王新军,陆海空.平板冲击发散冷却流动与换热特性的数值模拟.2017,51(7):57-61.[doi:10.7652/xjtuxb2017 07009]

李法敬,高建民,史晓军,等.电主轴轴心冷却用环路热虹吸管的传热特性.2017,51(7):90-97.[doi:10.7652/xjtuxb 201707014]

阮一逍,薛绒,赖欢,等.单液氮液滴在气流中的蒸发运动特性研究.2017,51(6):147-152.[doi:10.7652/xjtuxb201706 023]

杜长河,范小军,李亮,等.旋转半径和叶片安装角对动叶旋流冷却流动和传热特性的影响.2017,51(5):37-42.[doi:10.7652/xjtuxb201705006]

王宏朝,单希壮,杨志刚.利用矩阵风扇的发动机舱流场优化.2017,51(3):14-19.[doi:10.7652/xjtuxb201703003]

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