amount of air diverted to air jets 46 may be less than the amount of air passing through air inlet duct 35 the geometry of air inlet duct 35 may such that pressure fluctuations within fuel nozzle 26 may be minimized to provide for piece wise uniform flow through air inlet duct 35 in one example air inlet duct 35 may be generally straight and may have a predetermined length the predetermined length of air inlet duct 35 may be set during manufacture of turbine engine 10 according to an axial fuel introduction location and a naturally occurring pressure fluctuation with combustion chamber 28 the method of determining and setting the length of air inlet duct 35 will be discussed in more detail below mixing duct 37 may embody a tubular member configured to axially direct the fuel air mixture from fuel nozzle 26 into combustion chamber 28 in particular mixing duct 37 may include a central opening 52 that fluidly communicates barrel housing 34 with combustion chamber 28 the geometry of mixing duct 37 may be such that pressure fluctuations within fuel nozzle 26 are minimized to provide for piece wise uniform flow through air inlet duct 35 in one example mixing duct 37 may be generally straight and may have a predetermined length similar to air inlet duct 35 the predetermined length of mixing duct 37 may be set during manufacture of turbine engine 10 according to an axial fuel.