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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.142 SNIP: 0.16 CiteScore™: 0.29

ISSN Print: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v8.i5.50
pages 447-454

MULTI-CYCLE EXPERIMENTS ON MULTI-TUBE PULSE DETONATION ENGINE

Hisato Muro
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
Taro Hino
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
Ryo Hamazoe
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
Mio Takemoto
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
Hironobu Yamazumi
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
Tomoaki Yatsufusa
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
Takuma Endo
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
Shiro Taki
Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527

ABSTRACT

Multi-cycle experiments on a multi-tube pulse detonation engine (PDE) were carried out. The PDE consisted of four detonation tubes. They were ignited sequentially with the operation frequency of 120−200 Hz (30−50 Hz/tube). The exhaust gas flows from the detonation tubes were combined in a cone-shaped collecting duct, to the exit of which a straight exhaust duct was connected. In order to investigate the controllability of pressure pulses in the PDE system, an orifice was installed at the exit of the straight exhaust duct. In the experiments, the size of the orifice, the length of the straight exhaust duct, and the operation frequency were varied, and pressure histories at the exit of the straight exhaust duct (upstream of the orifice) were measured. The following were found out. The strength and timing of a pressure pulse at the exit of the straight exhaust duct (upstream of the orifice) were, to some extent, controllable by varying the size of the orifice and the length of the straight exhaust duct. Smaller orifices made the operation stability of the multi-tube PDE lower. The back-pressurization of the PDE system was realized by high-frequency operation of a PDE with an orifice at the exit.


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