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Accelerated initiation of oblique detonation induced by disturbance in detonative zone

Chinese Journal of Aeronautics 2023年第11期36卷 153-164页

作者： Yichen ZHANG Gaoxiang XIANG Jia YU Ke JIN Kek Boon GOH Institute of Extreme Mechanics Northwestern Polytechnical UniversityXi’an 710129China Research and Development Institute Northwestern Polytechnical University in ShenzhenShenzhen 518057China Innovation Center NPU Chongqing Northwestern Polytechnical UniversityChongqing 401135China School of Aerospace Science and Technology Xidian UniversityXi’an 710126China Department of Mechanical Engineering School of EngineeringMonash University MalaysiaSelangor 47500Malaysia

In the real flow for high altitude,the initiation mechanism of the oblique detonation involves the coupling of complex wave structures and combustion waves,which may result in the phenomenon of *** approach of stable initiation is one of the key factors that restricting the oblique detonation engine from theory to *** wave structure,initiation characteristics and characteristic parameters of the flow field are analyzed,the two-dimensional Euler equation considering the detailed chemical reactions of multi-component are ***,the approaches of blunt bump and transverse jet are combined used to shorten the detonation distance of the oblique *** show that these methods can promote the accelerated initiation of the oblique detonation effectively,and the detonation distance can be shortened more than 90%.There are two wave structures induced by the blunt bump:weak coupled and strong coupled,adding the transverse jet promotes the transition between these two wave ***,the shape of the bump and the characteristic parameters of the transverse jet are *** streamline-shape bump can eliminate the recirculation zone formed after the circle bump and the ellipse *** transverse jet will produce an oblique detonation wave at the front of the jet position,which changes the wave structure and initiation mode of the oblique detonation *** is expected to reveal the accelerated initiation mechanism of oblique detonation under the induction zone disturbance and complex flow environment,deepen the understanding of the detonation law of oblique detonation wave under real flow conditions,and provide a scientific basic for the development of the combustor of the oblique detonation engine.

关键词： Acetylene Oblique detonation initiation acceleration Blunt bump Transverse jet Numerical simulation

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