机械科学与技术2024，Vol.43Issue(7)：1151-1157,7.DOI:10.13433/j.cnki.1003-8728.20240023
考虑精铸变形的涡轮叶片气膜冷却效率灵敏度计算方法研究
Calculation Method of Turbine Blade Cooling Efficiency Sensitivity Considering Deformation of Investment Casting
摘要
Abstract
The precision casting process results in a random deviation between the turbine blade geometry and the design,which has an uncertain effect on the blade air cooling efficiency.The uncertainty of turbine blade contour deviation is a minor disturbance problem in geometry.A model for deformation in the investment casting of the turbine blade is established by using the investment casting simulation.According to PIV and the numerical simulation,a realizable k-epsilon turbulence model for fluid-heat coupling calculation was established.A sensitivity calculation method of cooling efficiency considering blade deformation was established,and the sensitivity variation of the turbine blade air-cooling efficiency with the blow ratio was calculated.The results show that the greater the deformation of turbine blades is,the greater the loss of the original cooling efficiency.The overall average blade deformation of 0.25 mm makes the overall air-cooling efficiency loss of about 5%,and the local deformation such as 0.70 mm at the rear edge of the blade make the average air-cooling efficiency to be a loss of about 8%.关键词
涡轮叶片/精铸变形/CFD仿真/气膜冷却效率/灵敏度Key words
turbine blade/investment casting deformation/cfd simulation/film cooling efficiency/sensitivity分类
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尤鑫添,董一巍,刘松,吴超林,郭文,龚雨晗..考虑精铸变形的涡轮叶片气膜冷却效率灵敏度计算方法研究[J].机械科学与技术,2024,43(7):1151-1157,7.基金项目
国家科技重大专项(J2019-II-0022-0043,J2019-VII-0013-0153)、国家自然科学基金项目(51705440)、福建省自然科学基金项目(2019J01044)、航空科学基金项目(20170368001,20230003068002)及福建省中科院STS计划配套院省合作重大项目(2022T3071) （J2019-II-0022-0043,J2019-VII-0013-0153）
