飞机液压系统不同泵源形式的热特性仿真与对比分析
Thermal Performance Simulation and Comparing Analysis for Aircraft Hydraulic System with Different Pumping Source Structure

为了得到不同泵源形式对飞机液压系统热特性的影响，建立了飞机不同泵源形式全机液压系统的热特性模型，进行了仿真计算和对比分析研究。分析了飞机液压系统恒压变量泵、双级恒压变量泵、负载敏感泵和智能泵4种不同泵源形式的工作特性，采用基于Modelica的飞机液压系统热特性仿真方法建立了不同泵源形式的飞机液压系统热特性模型，并就防空截击和机动飞行两种任务剖面下飞机液压系统的热特性进行数字仿真和对比分析。结果表明，使用智能泵会显著降低液压系统的温度，特别在功率需求较小的工况下使用时效果更为明显。
In order to obtain the effect of pump source structure on the thermal characteristics of aircraft hydraulic system, the thermal model for aircraft hydraulic systems with different pump source structure is established, and the simulation calculation and comparing analysis are carried out. Four different kinds of pump source structure in aircraft hydraulic system including constant pressure variable pump, double stage constant pressure variable pump, the work load sensitive pump and intelligent pump are analyzed. The thermal characteristics model for aircraft hydraulic system with different pump source structure is established based on the thermal characteristics simulation method of aircraft hydraulic system presented by Modelica. The simulation and comparing analysis are carried out, considering thermal characteristics of aircraft hydraulic system with the two different mission profile of air defense interception and maneuver flight. The results show that the intelligent pump significantly reduce the hydraulic system temperature, and this advantage is more obvious under the operation condition which demands the less power