摘要
为探究基于层板的综合冷却效率匹配原则是否适用于涡轮叶片前缘区域,采用数值模拟方法在3个动量比下进行了发动机工况和实验室工况综合冷却效率对比。结果表明:基于层板的综合冷却效率匹配原则可用于指导涡轮叶片前缘综合冷却效率实验,但主流侧毕渥数在叶片前缘区域的匹配会出现较大误差;尽管如此,主流侧毕渥数对前缘综合冷却效率的影响较小,不是关键相似参数;通过调整固体域导热系数对主流侧毕渥数的匹配进行二次校准,可使综合冷却效率的匹配效果更好。
To investigate the applicability of the analogy principle of overall cooling effectiveness(ϕ)derived from laminated plates to the turbine vane leading edge,numerical simulations were employed to compareϕunder both engine and laboratory conditions across three momentum ratios.The findings demonstrate that the analogy principle is effective in guiding experimental investigations of overall cooling effectiveness at the leading edge.However,notable discrepancies were observed in the matching of the mainstream Biot number(Big).Despite these discrepancies,Big exerts a relatively minor influence on the overall cooling effectiveness at the leading edge and does not constitute a critical similarity parameter.By modifying the thermal conductivity of the solid domain and conducting secondary calibration on the Big matching,the alignment of overall cooling effectiveness can be significantly enhanced.
作者
王睿
刘存良
李鹏刚
叶林
周天亮
WANG Rui;LIU Cuniang;LI Penggang;YE Lin;ZHOU Tianiang(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China;AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)
出处
《燃气涡轮试验与研究》
2025年第2期110-118,共9页
Gas Turbine Experiment and Research
基金
国家自然科学基金(52406056,U2241251)
陕西省创新能力支撑计划(2023-CX-TD-19)。
关键词
前缘
综合冷效
模化理论
主流侧毕渥数
变导热系数
二次校准
leading edge
overall cooling effectiveness
analogy principle
mainstream Biot number
adjust thermal conductivity
secondary calibration
