After this, when the ramjet of the design example moves to a constant orbit with a dynamic pressure of 50 kPa and reaches an altitude of 10 km, answer the following questions.
1) Find the amount of inflow air at this time.
2) Fuel is supplied so that the air-fuel ratio (A / F) is 20, the combustion efficiency drops to 0.6, and the theoretical characteristic exhaust speed: c * h is calculated as the total nozzle throat pressure: pt5. Please.
3) Combustion chamber inlet pressure: If pt3 is pt5 + 0.02MPa, find the value of the differential pressure (inlet margin pressure) from pt2. The pressure recovery rate of the air intake is based on the following formula. However, M1 is the flight Maach number.