a geometric shape that facilitates the formation of recirculation vortex 44 inside combustor 28 in one form end wall 34 has a cross sectional shape of a dome and may be referred to as a dome panel in other embodiments end wall 34 may have other geometric configurations in one form end wall 34 and combustion liner 32 are integrally formed in other embodiments end wall 34 and combustion liner 32 may be separately formed and subsequently assembled and or joined together compressor discharge air injectors 38 are spaced apart circumferentially around combustor 28 compressor discharge air injectors 38 are operative to initiate recirculation vortex 44 in the pz inside combustor 28 in one form air injectors 38 are formed integrally with combustor 28 in other embodiments air injectors 38 may be separately formed and subsequently affixed to combustor 28 in one form compressor discharge air injectors 38 extend inside of combustor 28 in one form compressor discharge air injectors 38 are curved tubes that extend from end wall 34 to the pz inside combustor 28 in one form air injectors 38 have an end 46 that is disposed adjacent to and abuts recirculation vortex 44 in another form end 46 is disposed.