GTF发动机风扇驱动齿轮箱风阻功率损失研究  

Experimental Study on Windage Power Loss of Fan Drive Gearbox System in GTF Engine

作　　者：覃琨 冯金 刘晓凡 李嘉东 吴超琦 QIN Kun;FENG Jin;LIU Xiaofan;LI Jiadong;WU Chaoqi(Department of Mechanical Systems,AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 201108,China)

机构地区：[1]中国航发商用航空发动机有限责任公司机械系统部,上海201108

出　　处：《机械科学与技术》2023年第12期2125-2131,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：上海市科委项目(20511106100)。

摘　　要：为研究风扇驱动齿轮箱风阻功率损失,基于齿轮风阻原始公式,阐明了油气比1∶34.25的通用风阻公式在风扇驱动齿轮箱中应用的局限性,除油气比外,内齿圈风阻计算公式需通过CFD仿真进行了修正;通过直接法测量GTF风扇驱动齿轮箱不同工况下的功率损失,结果表明:在轻载状态下齿轮箱总功率损失与转速成明显的指数关系,风阻损失占主导,理论值与实测值相差50 kW;不同转速相同扭矩状态下,修正理论功率损失和实测功率损失之间的差值由齿轮风阻引起,风扇驱动齿轮箱中拟合油气比约为1∶1.37;并给出齿轮箱风阻功率损失计算公式修正系数。In order to study the windage power loss of Fan Drive Gearbox(FDGS),the limitation of the application of the general wind resistance formula with an oil air ratio of 1∶34.25 in the fan drive gearbox are clarified based on the original formula of gear windage power loss.Besides the oil-gas rate,the wind resistance formula of the inner gear ring windage power loss needed to be modified by using the CFD simulation.The power loss of FDGS under different working conditions was measured by using the direct method.The result show that the total power loss of the gearbox under light load has an exponential relationship with the rotational speed,and the windage power loss is dominant.The difference between the theoretical and the measured value is 50kW.Under the different rotational speeds and the same torque,the difference between the theoretical and the measured power loss is caused by the gear windage power loss,and the fitted oil-gas ratio in the FDGS is about 1∶1.37,in which the modified coefficient in the calculation formula of windage power loss is given.

关 键 词：风扇驱动齿轮箱 风阻功率损失 油气比 

分 类 号：TH132.413[机械工程—机械制造及自动化]