Numerical investigation of two-wave collision and wave structure evolution of rotating detonation engine with hollow combustor |
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Authors: | Zhijie Xia Xinmeng Tang Mingyi Luan Shujie Zhang Zhuang Ma Jianping Wang |
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Affiliation: | 1. Center for Combustion and Propulsion, CAPT & SKLTCS, Department of Mechanics and Engineering Sciences, College of Engineering, Peking University, Beijing 100871, China;2. Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi–cho Chiyoda-ku, Tokyo 102-8554, Japan |
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Abstract: | A three-dimensional numerical simulation of rotating detonation engine (RDE) with hollow combustor is performed to analyze wave structure evolution systematically. Wave structure evolution is classified into four categories, namely two-wave collision (counter-rotating waves), abscission of detonation tail, and shock wave to detonation transition. Two-wave collision consists of symmetric detonation collision, asymmetric detonation collision, and detonation/shock collision. Two symmetric detonation waves turn into shock waves after collision. Collision of asymmetric detonation waves creates single detonation wave. The detonation/shock collision decreases the detonation wave intensity. Abscission of detonation tail and shock to detonation transition can both create single detonation wave or two opposite-direction detonation waves, depending on the wave hitting angle and the amount of fresh gas. All phenomena mentioned above affect the number of detonation waves in the combustion chamber. |
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Keywords: | Rotating detonation engine Hollow combustor Wave structure evolution Two-wave collision Number of detonation waves |
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