Simulation Research on Fuel Temperature Variation Law of a UAV during Climbing

Abstract

The medium altitude long endurance UAV Using RON 95# vehicle gasoline or 100LL aviation gasoline as fuel is prone to encounter air lock during climbing. The simulation model of the UAV fuel system is built by using the Flowmaster software. Taking the parameters of environment temperature, initial fuel temperature, initial fuel quantity and fuel consumption rate as boundary conditions, the fuel temperature in the fuel tank during the flight is obtained by simulation. The feasibility of the simulation model is verified by comparing with the actual flight test data. Based on the simulation model, the influence of environment temperature, fuel quantity, fuel consumption rate, climbing speed and other factors on the fuel temperature change law is further quantitatively studied. The results show that for the fuel system, the change of fuel temperature in the process of continuous climbing is distinctly affected by the initial ambient temperature and climbing speed while the influence of fuel quantity and fuel consumption rate on the change of fuel temperature is relatively small. The lower the initial ambient temperature and the less fuel are, the bigger the fuel consumption rate is, and the higher the climbing speed is, the greater the decrease of fuel temperature will be.

Keywords

• uav
• fuel system
• gasoline
• temperature
• flowmaster