气冷涡轮叶片元件级气热耦合实验研究  

Experimental Study on the Cooling Structure of Aero-engine Turbine Components with Conjugate Heat Transfer

作　　者：陈毅 韦宏 祖迎庆 丁亮 CHEN Yi;WEI Hong;ZU Yingqing;DING Liang(Department of Aeronautics and Astronautics,Fudan University,Shanghai 200433,China;AECC Commercial Aircraft Engine Co.,LTD,Shanghai 200241,China)

机构地区：[1]复旦大学航空航天系,上海200433 [2]中国航发商用航空发动机有限责任公司,上海200241

出　　处：《复旦学报（自然科学版）》2019年第4期506-514,共9页Journal of Fudan University：Natural Science

基　　金：上海市商用航空发动机领域联合创新计划(AR908)

摘　　要：涡轮叶片具有超高热负荷、复杂几何外形以及对结构强度要求严格的特点.因此,对其进行高效冷却结构设计成为航空推进领域最具挑战性的问题之一.本实验主要对带有冲击孔和气膜孔的平板实验件进行测量.试验件采用3种不同材料进行加工,分别为不锈钢(SS304)、铝(AL6061)和聚四氟乙烯(PTFE).实验中气膜冷气入射角度(α)为45°,吹风比(λBR)在0.25~1.00范围内变化,气膜孔板热侧面温度通过稳态液晶热成像技术进行测量.本文围绕吹风比和毕渥数对冷却效率及流量系数的影响展开了详细的分析与讨论.Turbine blades efficient cooling is one of the most challenging problems to ensure that the blades survive for their estimated life because of its high thermal load,complex geometry shape,and strict demand for structural strength etc.In the present study,the conjugate heat transfer characteristics of the turbine cooling structures combining staggered arrays of film holes and impingement holes are investigated experimentally.Experimental study is carried out with three kinds of model materials:Stainless steel(SS304),Aluminum(AL6061)and Polytetrafluoroethylene(PTFE)when the film injection angle(α)are 45°and blowing ratio(λBR)changes within a range ofλBR=0.5—1.0.The hot-side surface temperature of target plate is monitored with a steady-state technology of liquid crystal thermography.The effects of blowing ratio and Biot number on the integrated cooling effectiveness and discharge coefficient are analyzed and discussed in detail.

关 键 词：涡轮叶片 气热耦合 冷却效率 毕渥数 吹风比 

分 类 号：O351.2[理学—流体力学]