关键词: 脉冲爆震发动机+;阻力;推力;气动阀

Abstract: Investigation on net thrust of multi-cycle pulse detonation engine （PDE） with a detonation tube which has inner diameter of 150mm and length of 1800mm,filling liquid gasoline and air into the tube as detonable mixture by aero-valve, was performed. Through a number of tests initially at ambient conditions （T₁=300K and p₁=100kPa）, fully developed repetitive detonation waves were produced. The net thrust of PDE was obtained by integration of the record of instantaneous thrust by direct measurements. A steady static load cell was used to measure respectively the drag thrust during the periods of close and of open aero-valve. An approximate mathematic model for net thrust of PDE was formulated. Experimental results show that the drag thrust depends on flight speed （or filling speed）. The net thrust measured directly agrees well with the calculated result. The conclusion will help to optimize the design of practical PDE.

Key words: Pulse detonation engine~+;Drag;Thrust;Pneumatic valve