航空发动机矢量喷管作动器电磁阀通油不冷却工况热分析

分析了航空发动机矢量喷管作动器电磁阀在通油不冷却工况所处热环境。建立了电磁阀热分析计算模型及其热平衡方程组。编制源程序进行了求解。结果表明:因为电磁阀尾部附近的作动器总体主油路仍然工作,带走热量;所以电磁阀在额定工况、通油不冷却工况下可正常工作。另外,还对影响电磁阀温度的四个主要因素:环境温度、焦耳热、入口油温、作动器总体主油路流量进行了一系列研究,得到了各因素对电磁阀温度的影响规律。其中,环境温度对电磁阀温度影响最大。当无量纲环境温度小于1.53时,电磁阀温度在可承受极限温度范围内,可以正常工作;当无量纲环境温度高于1.53时,电磁阀将处于超温状态,不能正常工作。

Heat analysis of solenoid valve of TVC engine actuator while cooling system is out of work

With the thermal environment analysis of solenoid valve in the TVC engine actuator, the simulation model of the solenoid and the thermal equilibrium equations are established. The source program for solving the equations is compiled. By solving the equations it can be concluded that the solenoid valve can endure the limit temperature and work well while the valve is in rated condition when the cooling system fells down and main oil pipeline works. Further series researches are conducted about the 4 other main factors which influence the valve temperature like environment temperature, Joule heat, temperature at the inlet and flux of main oil pipeline. The regulation of factors influencing the valve is figured out. The environment temperature has a great influence on solenoid valve temperature. When the dimensionless environment temperature is beneath 1.53, the temperature of solenoid valve is under the limit and the valve will work well. Otherwise the valve can not work smooth due to the high temperature.