大曲率板壳综合冷却效率模化数值研究  

Numerical Study on the Analogy Principle of the Overall Cooling Effectiveness for the Hot Components With Large Curvature

作　　者：杜昆 梁庭睿 宋辉[1] 刘存良[1,3,4] DU Kun;LIANG Tingtui;SONG Hui;LIU Cunliang(School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China;Yangtze River Delta Research Institute of NPU,Northwestern Polytechnical University,Taicang 215400,China;Shaanxi Key Laboratory of Thermal Sciences in Aero-Engine System,Northwestern Polytechnical University,Xi'an 710129,China;NPU-KAI International Joint Laboratory of Advanced Aero-Engine Thermal Structure,Northwestern Polytechnical University,Xi'an 710129,China)

机构地区：[1]西北工业大学动力与能源学院,西安710129 [2]西北工业大学太仓长三角研究院,太仓215400 [3]西北工业大学陕西省航空动力系统热科学重点实验室,西安710129 [4]西北工业大学-喀山国立技术大学先进航空发动机热结构国际联合实验室,西安710129

出　　处：《工程热物理学报》2024年第5期1332-1340,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52006178);国家科技重大专项(No.Y2019-VIII-0007-0168);航空发动机及燃气轮机基础科学中心项目(No.2022-DC-I-002-001);中央高校基本科研业务费专项资金(No.3102018zy019,No.3102020OMS701);陕西省创新能力支撑计划(No.2023-CX-TD-19)

摘　　要：现阶段针对航空发动机热端部件复合冷却,提出的综合冷却效率来表征固体表面的无量纲温度分布。基于一维半无限大平板综合冷却效率模化公式为指导实验参数匹配与冷却结构设计提供了理论支持,然而在大曲率区域该模化公式预测误差较大。因此本文提出一种大曲率板壳综合冷却效率模化的公式,并建立不同曲率的冲击-气膜冷却板壳结构进行验证。结果显示,随着曲率增大,一维半无限大平板综合冷却效率模化公式得到的面平均综合冷却效率预测误差达到52%;在所研究的全部曲率半径模型中,大曲率板壳综合冷却效率模化公式的预测精度显著提高,误差值最大不超过26%。The overall cooling effectiveness is proposed to represent the surface temperature field for the composite cooling of the aero-engine hot components.The analogy formula of the overall cooling effectiveness provides the theoretical reference for the experimental parameter matching and cooling structure design.However,the formula is ineffective in the region with large curvature.Hence an analogy method was proposed for the overall cooling in the large curvature components in this research.It is investigated by establishing conjugate heat transfer models of impingement-film cooling with different curvatures.And the prediction accuracy of different analogy formulas are compared.The results illustrate that the overall cooling effectiveness predicted by the conventional analogy method shows significant rising prediction error with the enlarging curvature.The maximum prediction error of area-averaged overall cooling effectiveness reaches 52%.While the prediction accuracy of the overall cooling analogy formula for large curvature plates significantly improves,with a maximum prediction error less than 26%.

关 键 词：综合冷却 模化公式 曲率板壳 预测误差 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]