Design-oriented research of air mass flux characteristic for scramjet

With regard to air mass flux characteristic of scramjet for airbreathing hypersonic flight vehicle, mathematical model of design-oriented air mass flux characteristic was derived by means of force analysis, energy conservation principle, specific impulse definition and so on. What's more, design-oriented air mass flux characteristic was contrasted and analyzed in combination with instance in terms of quantitative and qualitative analysis. The results show that air mass flux obviously decreases by making use of hydrocarbon fuel and air launch. Variation trend of cruising range was contrary to that of cruising speed, which requires optimization about the both parameters. Air overflow and appropriate equivalent specific fuel consumption were required with mass reduction during cruise flight.