摘要
A mathematical model of principal elements of the aircraft hydraulic system is presented based on the heat transfer theory. The dynamic heat transfer process of the hydraulic oil and the pump shells within an aircraft hydraulic system are analyzed by the difference method. A kind of means for the prediction to variational trends of the aircraft hydraulic system temperature is provided during operation. The numerical prediction and simulation under the operational conditions are presented for ground trial running and the decelerated operation in flight. Computational results show that there is a good coincidence between the experimental data and the numerical predictions.
根据传热学基本原理建立了主要液压系统元件的数学模型 ,运用差分法对飞机液压系统中液压油和壳体的动态传热过程进行了研究 ,为飞机液压系统在各种工况下的温度变化趋势进行预测提供了一种有效的工具。本文对某型教练机的液压系统在地面试车及飞行中减速板收放两种工况下进行了数值预测与仿真 。
