暖机对涡扇发动机加速过程中压气机叶尖间隙影响分析

doi:10.13675/j.cnki.tjjs.190116

推进技术 ›› 2020, Vol. 41 ›› Issue (5): 1144-1151.DOI: 10.13675/j.cnki.tjjs.190116

暖机对涡扇发动机加速过程中压气机叶尖间隙影响分析

钱仁军¹，李本威¹，宋汉强²，武晓龙³，张赟¹

1.海军航空大学航空基础学院，山东烟台 264001;2.海军装备研究院，上海 200436;3.海军驻沈阳地区第二军事代表室，辽宁沈阳 110043

发布日期:2021-08-15
基金资助:
国家自然科学基金（51505492）；泰山学者建设工程专项经费资助。

Effects of Heating of Turbine on Turbofan Engine Compressor Tip Clearance During Acceleration Process

1.Aviation Foundation College,Naval Aviation University,Yantai 264001,China;2.Naval Research Academy,Shanghai 200436,China;3.Naval Consumer Representative Office of Engine in Shenyang,Shenyang 110043,China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究涡扇发动机暖机程序是否合理，分析了暖机与不暖机对发动机加速过程中压气机叶尖间隙变化造成的影响，并进行了两种情况下变化规律的对比分析。建立了转子模型，在综合考虑转子离心载荷与温度载荷基础上，运用该发动机暖机与不暖机情况下台架测试数据绘制载荷谱，并基于Workbench平台采用热—固耦合分析方法对加速过程中发动机转子径向位移进行仿真计算。根据转子径向间隙计算模型，利用仿真结果计算获得暖机与不暖机情况下的叶尖间隙。结果表明，充分暖机后的压气机叶尖间隙值明显小于不暖机情况下的间隙值，相对原始装配间隙，两者在慢车状态时相差19.86%，在最大加力状态相差8.04%，且加速过程中叶尖间隙变化规律均为随时间增加而不断减小，在慢车至中间状态过程中迅速减小，在加力过程中缓慢减小。

关键词: 暖机;冷推;热—固耦合;加速过程;压气机;叶尖间隙

Abstract: In order to study whether the heating program of a turbofan engine is reasonable, the effects of heating and unheating on compressor tip clearance change of the engine during acceleration are analyzed and the change rules under this two conditions are compared. The rotor model was established. On the basis of considering centrifugal and temperature load of the rotor, the load spectrum was drawn by using engine bench test data under heating and unheating conditions. The radial displacement of the engine rotor during acceleration was simulated by using thermal-solid coupling analysis method based on Workbench. According to the calculation model of the rotor radial clearance, the tip clearances under heating and unheating conditions were calculated by the simulation results. The results show that the tip clearance of compressor after fully heated is significantly smaller than that without heating. Compared with the original assembly clearance, the difference between two tip clearances is 19.86% in idle state and 8.04% in maximum afterburning state. During the acceleration process, the tip clearance decreases rapidly from the idle to the intermediate state and slowly during the afterburning process.

Key words: Heating of turbine;Cold push;Thermal-solid coupling;Acceleration process;Compressor;Tip clearance

钱仁军，李本威，宋汉强，武晓龙，张赟. 暖机对涡扇发动机加速过程中压气机叶尖间隙影响分析[J]. 推进技术, 2020, 41(5): 1144-1151.

QIAN Ren-jun¹, LI Ben-wei¹, SONG Han-qiang², WU Xiao-long³, ZHANG Yun¹. Effects of Heating of Turbine on Turbofan Engine Compressor Tip Clearance During Acceleration Process[J]. Journal of Propulsion Technology, 2020, 41(5): 1144-1151.

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暖机对涡扇发动机加速过程中压气机叶尖间隙影响分析

Effects of Heating of Turbine on Turbofan Engine Compressor Tip Clearance During Acceleration Process

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