It is also recognised that bulk density has considerable impact on gas quality, as it influences the fuelresidencetime in the fire box, fuel velocity and gas flow rate.
它也认识到，体积密度的气体质量相当大的影响，因为它影响在火灾中燃料的停留时间，燃油流速和气体流量。
2
Due to extremely short residencetime of supersonic airflow, it is difficult to effectively mix and combust for the fuel and air in scramjet combustor.