Modeling and simulation of proportional fuel flow rate control valve

A spool type fuel control valve is developed in this paper to control the flow rate of high temperature fuel supply for ramjet engines. The mathematical model of the flow rate control valve is given and the simulation is done using Matlab software. The proportional characteristic curve, flow rate-pressure drop characteristic curve and step response characteristic curve are obtained under different working conditions. The result shows that the pressure drop, inlet pressure and temperature have influence on the gaseous flow rate. When the inlet pressure and outlet pressure are constant, the valve´s flow rate is linear to the input current.