摘要
通过搭建法兰接触热阻实验台,在法兰间隙0~0.75 mm、螺栓拧紧力矩20~40 N·m参数范围内,测量不同材料机匣多个轴向位置的壁温来获得通过法兰的热流,得到法兰的接触热阻、单位接触热导。分析了法兰间隙、螺栓拧紧力矩对法兰接触热阻特性的影响。研究结果表明随着法兰间隙的增加,接触热阻呈线性增加,最大增加0.03 K/W,单位接触热导先迅速减小,后趋于平缓,最大降低了10744.2 W/(K·m^(2)),约94.5%;随着拧紧力矩的增加,接触热阻减小,最大降低了22.1%。
By setting up a flange contact thermal resistance experimental bench,within the range of 0-0.75 mm of flange clearance and 20-40 N·m of bolt tightening torque,the wall temperature of multiple axial positions of casing of different materials was measured to obtain the heat flux passing through the flange,and the contact thermal resistance and unit contact thermal conductivity of the flange were obtained.The influences of flange clearance and bolt tightening torque on the contact thermal resistance of flange were analyzed.The results showed that with the increase of flange clearance,the contact thermal resistance increased linearly,the maximum increase was 0.03 K/W,the unit contact thermal conductivity decreased rapidly at first,and then was inclined to smooth,with the maximum reduction of 10744.2 W/(K·m^(2)),about 94.5%;with the increase of tightening torque,the contact thermal resistance decreased,the maximum reduction was 22.1%.
作者
陈燕
樊光亚
林志辉
史博文
刘高文
CHEN Yan;FAN Guangya;LIN Zhihui;SHI Bowen;LIU Gaowen(School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China;Shaanxi Key Laboratory of Thermal Science in Aero-engine System,Northwestern Polytechnical University,Xi'an 710072,China;Commercial Aircraft Engine Company Limited,Aero Engine Corporation of China,Shanghai 200241,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2022年第4期734-742,共9页
Journal of Aerospace Power
基金
国家科技重大专项基金(2017-Ⅲ-0011-0037)。
关键词
机匣法兰
法兰间隙
拧紧力矩
接触热阻
单位接触热导
casing flange
flange clearance
tightening torque
contact thermal resistance
unit contact thermal conductivity