Experimental investigation into effects of filling coefficients on pulse detonation engine pressure

Fully developed C-J detonation waves are produced successfully by PDE (pulse detonation engine) model with 56 mm ID using gasoline as fuel and air as oxidizer. Under same excess coefficient α, and various filling coefficients β, the detonation pressures are measured, and the factors influencing detonation pressures are analyzed. The experimental results have shown that for a given length of PDE model, detonation wave pressures decrease and the performances of PDE model become worse with the falling of filling coefficients ratio under the same excess coefficient. While filling coefficients are less than the critical filling coefficient β_cr, deflagration rather than detonation is developed in the detonation chamber.