发动机矢量喷管作动器电磁阀非稳态热分析

发布时间：2019-01-06 07:08

【摘要】：为研究航空发动机矢量喷管作动器电磁阀在不通油工况达到可耐受最高温度的时间(超温时间),采用集总参数法对电磁阀进行非稳态热分析。分别以整个作动器壳体和电磁阀部件为研究对象,考虑了电磁阀与环境的对流换热与辐射换热,建立了电磁阀温度与时间的数学模型,研究了环境温度T_(wai)、冷媒初始温度T0两个参数对电磁阀温度随时间变化关系的影响。结果表明:电磁阀温度随着环境温度的升高而升高;超温(T*℃)时间随着环境温度的升高而缩短。在环境温度与加热时间相同的条件下,电磁阀部件的温度远高于壳体的整体温度。在T_(wai)为250℃的不通油工况下,当T_0为70℃时,电磁阀部件的超温时间为17 min,电磁阀壳体的超温时间为59分钟,当T_0为93.76℃时,电磁阀部件的超温时间为15 min,电磁阀壳体的超温时间为50 min。
[Abstract]:In order to study the time (overtemperature time) when the electromagnetic valve of vector nozzle actuator of aero-engine can reach the maximum temperature (overtemperature time) under the condition of oil failure, the lumped parameter method is used to analyze the unsteady state of the solenoid valve. Taking the whole actuator shell and solenoid valve parts as research objects, the convection heat transfer and radiation heat transfer between solenoid valve and environment are considered, the mathematical model of solenoid valve temperature and time is established, and the ambient temperature T _ (wai), is studied. The influence of two parameters of refrigerant initial temperature T _ 0 on the variation of solenoid valve temperature with time. The results show that the temperature of solenoid valve increases with the increase of ambient temperature, and the time of overheating (T * 鈩，

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