Abstract: Based on kerosene/air singletube aerovalve pulse detonation engine (PDE), a whole test system of kerosene/air tripletube aerovalve PDE is established. In a tripletube aerovalve PDE composed of each detonation tube 100 mm in inner diameter and 2 000 mm in length, with heated liquid kerosene and lowpollution air filled into the tubes as detonable mixture, a multicycle detonation test is carried out. The scheduling operation of tripletube PDE at total frequency of 30 Hz can be guaranteed, and the fullydeveloped ChapmanJouguet (CJ) detonation waves are obtained in each detonation tube successfully. Moreover, the influence of common inlet on detonable mixture filling, and the detonation wave pressure property of tripletube aerovalve PDE at different total frequencies are investigated. The results lay the foundation for investigating deeply the performance of multitube PDE and supply the preliminary design theory to explore the feasibility of pulse detonationturbofan combined engine(PDTE).

Key words: pulse detonationturbofan combined engine, pulse detonation engine, detonative combustion, aerovalve, tripletube