Experimental Research of Fuel Mass Flow Rate Distribution Effectiveness in Fuel Manifold on Engine Starting Performance

Abstract

The component test results of fuel flow divider connecting fuel manifolds show that, when the starting fuel supply is given and the primary fuel manifold relative unfold pressure is at constant, the adjustment of the secondary fuel manifold turn-on pressure has effects on fuel flow through the primary fuel manifold and the time of fuel into the combustion chamber. The verification results of the secondary fuel manifold unfold pressure influence on engine starting performance shows that, when the secondary fuel manifold unfold pressure is low, the time of fuel into the combustion chamber is short, the engine starts fast; but because of rotation speed is low and engine inlet air flow is less, the gas temperature in staring phase is high. The test research results have important guidance and reference meaning for confirming the secondary fuel manifold unfolds pressure.