Fast Dynamic Simulation Analysis of the Thermal Environment of Aircraft Lubricating Oil and Hydraulic Cooling System

The continuous increase in the power of airborne electronic equipment and the decrease of the airborne available heat sinks are the inevitable trends of the next generation aircraft. The lack of cabin heat dissipation capacity makes the operating environment temperature of airborne electronic equipment rise and the reliability decrease, thus affecting the combat performance of aircraft. Therefore, it is urgent to study the cooling capacity of the cabin area. In order to obtain the real-time variation of the cabin thermal environment during the whole flight process, the one-dimensional thermal path system of the oil and hydraulic cooling system AMESim is innovatively established to obtain the thermal boundary conditions of the equipment changing with time. Moreover, Fluent was substituted into the three-dimensional simulation analysis of the cabin environment and cabin equipment temperature field, and the simulation results of the transient temperature field and steady-state temperature field were compared. This method can be extended to the external environment under different flight conditions and the internal thermal equipment conditions to quickly and real-time evaluation of different cabin thermal environments. It can provide effective support and input conditions for the environmental thermal design of next generation aircraft cabin areas.