关键词: 横流;气体喷射;旋涡;混合;氢燃料;冲压喷气发动机

Abstract: Using Vortex Generator Jets to enhance the mixing of gaseous fuel jets and air inlet flow was investigatedThe velocity profile at air jet central symmetry and axial maximum velocity decay measured by five hole probe quantified the mixing ratesThe higher the momentum ratio of single hole jet,the quicker the mixingThe rate of mixing of slot jet was very slower than circular hole transverse jetIt was found that streamwise vortex has a significant effect on the mixing rates,the fast jet mixing could be acquired by adjusting orifice distance,duct height and jet momentum ratioAn important concept Vortex Penetration Depth is first introduced

Key words: Cross flow;Gas injection;Swirl;Mixing;Hydrogen fuel;Ranjet engine