Study on effects of the secondary fuel manifold unfold pressure on engine starting performance

The fuel manifold is an import accessory through which the fuel enters in combustor, after measuring in fuel control system. The component test results of 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 secondary fuel manifold and the time of fuel into the combustion chamber. The verification test of the secondary fuel manifold unfold pressure influence on engine starting performance has been conducted, showing that the unfold pressure variation of the secondary fuel manifold has great influence on the engine start performance. The test research results have important guidance and reference meaning for confirming the secondary fuel manifold unfolds pressure.