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。
In order to study the time over the highest temperature can be tolerated（ over temperature time） in certain working condition,the lumped parameter method was used to analyze the transient heat transfer of actuator solenoid-valve of aero engine vectoring nozzle. The totally actuator solenoid-valve shell and actuator solenoid-valve parts were studied as research object,respectively. The mathematical model of the temperature and time of the actuator was established,considering the convective heat transfer and radiation heat transfer between the actuator solenoid-valve and the environment. The influence of T_（wai） and T_0 on the model was studied. The results show that： the temperature of the actuator solenoid-valve increase with the increase of environmental temperature,the over temperature time decrease with the increase of environmental temperature. In the same heating time and environmental temperature,the temperature of actuator solenoid-valve parts far higher than the temperature of actuator solenoidvalve shell. When the T_（wai） is 250 ℃ and the T_0 is 70 ℃,the over temperature time of actuator solenoid-valve parts is 17 minutes,the over temperature time of actuator solenoid-valve shell is 59 minutes. When the T_（wai） is 250 ℃ and the T_0 is 93. 76 ℃,the over temperature time of actuator solenoid-valve parts is 15 minutes,the over temperature time of actuator solenoid-valve shell is 50 minutes.
出处
《科学技术与工程》
北大核心
2016年第16期285-289,共5页
Science Technology and Engineering
关键词
电磁阀
矢量喷管
非稳态
集总参数法
solenoid-valve
vectoring nozzle
lumped parameter method
transient heat transfer
