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[1]雷 蒋,鲁瑞山,秦 岭,等.静叶栅上游端壁双射流气膜冷却特性实验[J].火箭推进,2020,46(02):36-43.
　LEI Jiang,LU Ruishan,QIN Ling,et al.Experimental study of film-cooling characteristics of DJFC holes located upstream of a vane[J].Journal of Rocket Propulsion,2020,46(02):36-43.
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静叶栅上游端壁双射流气膜冷却特性实验

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 46 期数: 2020年02期 页码: 36-43 栏目: 研究与设计 出版日期: 2020-04-28
Title:
Experimental study of film-cooling characteristics of DJFC holes located upstream of a vane
文章编号:
1672-9374(2020)02-0036-08
作者:
雷 蒋1; 鲁瑞山1; 秦 岭1; 罗 丁1; 何建宏1; 马 元2
(1.西安交通大学 机械结构强度与振动国家重点实验室,陕西 西安 710049; 2.西安航天动力研究所 陕西 西安 710100)
Author(s):
LEI Jiang1;  LU Ruishan1;  QIN Ling1;  LUO Ding1;  HE Jianhong1;  MA Yuan2
(1.State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University, Xi’an 710049, China; 2.Xi’an Aerospace Propulsion Institute, Xi’an 710100, China)
关键词:
气膜冷却;  双射流;  静叶栅;  压力敏感漆;  吹风比;  密度比
Keywords:
film-cooling;  DJFC;  vane cascade;  PSP;  blowing ratio;  density ratio
分类号:
V231.1
文献标志码:
A
摘要:
为了进一步挖掘上游端壁气膜冷却的潜力,在低速叶栅风洞的静叶片上游端壁上,实验研究了双射流构型的气膜冷却特性,并与双排圆孔进行了对比。探究了吹风比(M=0.5,1.0,1.5,2.0)、密度比(Rd=1.0,1.5)的效应。端壁表面的气膜冷却效率通过压力敏感漆(PSP)测得。结果表明,吹风比的增大虽然会加剧吹离现象,但同时也会促进叶栅通道中、后段的气膜覆盖。密度比的增大会抑制气膜吹离,促进气膜横向覆盖和提高平均冷却效率。双射流孔相比于圆形孔,冷却气流在孔下游形成了反肾形涡,较好抑制了气膜吹离; 但从双射流孔喷出的冷却气流对于叶栅通道内的涡系也更加敏感。在高吹风比下,双射流孔的冷却效率相对于圆形孔有一定的优势,特别是双射流I构型。
Abstract:
To further explore the potential of film-cooling on the upstream endwall, the film-cooling characteristics of DJFC(double-jet film-cooling)holes on the endwall upstream of a vane cascade was studied by experiments and corresponding results were compared with double-row streamwise cylindrical holes located in the same position.Effects of blowing ratio and density ratio were discussed.PSP(pressure sensitive paint)was applied to measure film-cooling effectiveness on the endwall.Results show, though increased blowing ratio induces film lift-off, film coverage on the mid- and rear-portion of the endwall improves.Increased density ratio suppresses lift-off, enhances lateral coverage and increases lateral-average of effectiveness.Compared to SC(streamuise cylindrical)holes, anti-kidney vortices form at the exit of DJFC holes and thus decreases lift-off.However, DJFC holes are more sensitive to vortices generated in the cascade passage.At high blowing ratios, film effectiveness of DJFC holes are more advantageous over SC holes, especially DJFC I.

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备注/Memo

收稿日期:2019-07-12; 修回日期:2019-11-04基金项目:国家自然科学基金(51776153); 111引智项目(B18040); 西安市科技计划项目(201805034YD12CG18(3))作者简介:雷蒋(1980—),男,副教授,博士生导师,研究领域为推进系统热端部件传热冷却

更新日期/Last Update: 2020-04-25