Float Type Dual Oil Level Controller Opening and Fuel Flow Characteristics
The aircraft fuel system has functions such as storing fuel,delivering fuel to the engine,and adjusting the cen-ter of gravity of the aircraft.The fuel supplied from the storage tank to the engine needs to pass through the consumption tank.The dual oil level controller is a leading valve in the consumption tank,which can control the opening and closing of fuel delivery to ensure that the tank is basically full.During use,it is found that the dual oil level controller may fail to open or close prematurely,which greatly affects the safety of oil supply and transportation.In order to understand the causes of abnormal operation of the oil level controller and obtain the internal fuel flow characteristics of the valve,the method of dynamic modeling and simulation is adopted to obtain the motion trajectories of large and small valves under different working conditions,and the direction of valve oil pressure is found to have a significant impact on the opening process;and using CFD simulation method,the fuel flow characteristics of the valve are obtained.It is found that as the valve opening and inlet pressure increased,the outlet fuel changed from"gushing"to"spraying",and the proportion of fuel entering the float chamber beyond the oil baffle increased,which may lead to early closure of the fuel delivery.
万方数据
维普
