关键词: 涡轮喷气发动机;过渡流;加速性能;传热

Abstract: In order to simulate the engine real working processes during acceleration and deceleration,a model for estimating the heat transfer between gas and comPOnents is provided in this paper.By use of this model for simulating a two-spool mixed flow turbofan engine,some studies are carried out in this paper,which deal with:calculating the variety of heat transfer between gas and each comPOnent as accelerating time and the effects of heat transfer on thrust response;calculating and comparing two different accelerations named "cool" and "hot" of the engine under the same fuel schedule;estimating the effects of typical comPOnent watted area and metal mass on the Pefforrnance of acceleration.The results indicate that:(1) It can not be ignored that the heat transfer between gas and high temperature components influence on the transients of gas trubine engine;(2) Because of heat transfer the difference between "cool" and "hot" accelerations is significant,and fuel compensation is allowed to improve the Performance during the’cool" acceleration;(3) The estimation accuracy of the comas nent wetted area and mass has little influence on the performance of acceleration.

Key words: Turbojet engine;Transition flow;Acceleration performance;Heat transfer