In: Mechanical Engineering
An air–fuel mixture enters a constant area combustion chamber at a velocity of 100 m/s a pressure of 70 kPa and a temperature of 150°C. Assuming that the fuel–air ratio is 0.04, the heating value of the fuel is 30 MJ/kg, and the mixture has the properties of air, calculate the Mach number in the gas flow after combustion is completed and the change of stagnation temperature and stagnation pressure across the combustion chamber. Neglect the effects of viscosity and assume that the properties of the gas in the combustion chamber are the same as those of air.