Effect of flame stabilizer relative parameters on combustion and flow field in water ramjet

When the blunt body flame stabilizer installed in the combustion chamber，part of the burnt high-temperature combustion products can ignite fresh combustible mixture in the recirculation zone at the rear of the flame stabilizer so that the stable and efficient combustion can be achieved.By changing the flame stabilizer relative metal fuel inlet height and relative primary water inlet position，the effects of two different relative parameters：relative metal fuel inlet height and relative primary water inlet position，on mixing，combustion and flame stability in the combustion chamber were compared and analyzed. The results showed that when the relative metal fuel inlet height H was greater than 1，the combustion flame cannot be stabilized in the recirculation zone.When the relative position of flame stabilizer was fixed，the flame stabilization effect increased with the decrease of relative metal fuel inlet height in a certain range.Furthermore，there was superior relative metal fuel inlet height （H=1），which made the mixing efficiency and flame stability better in the combustion chamber.When the relative metal fuel inlet height H=1 was kept unchanged，considering the flame stability，aluminum/water mixing efficiency and engine performance synthetically，L=0.5 was the ideal relative position of flame stabilizer.