Influence of an enhanced injector on DDT process

RAO Feixiong; LEI Zhidi; DING Jue; WENG Peifen

doi:10.11883/bzycj-2017-0284

Volume 39 Issue 2

Feb. 2019

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RAO Feixiong, LEI Zhidi, DING Jue, WENG Peifen. Influence of an enhanced injector on DDT process[J]. Explosion And Shock Waves, 2019, 39(2): 022101. doi: 10.11883/bzycj-2017-0284

Citation:

RAO Feixiong, LEI Zhidi, DING Jue, WENG Peifen. Influence of an enhanced injector on DDT process[J]. Explosion And Shock Waves, 2019, 39(2): 022101. doi: 10.11883/bzycj-2017-0284

RAO Feixiong, LEI Zhidi, DING Jue, WENG Peifen. Influence of an enhanced injector on DDT process[J]. Explosion And Shock Waves, 2019, 39(2): 022101. doi: 10.11883/bzycj-2017-0284

Citation:

RAO Feixiong, LEI Zhidi, DING Jue, WENG Peifen. Influence of an enhanced injector on DDT process[J]. Explosion And Shock Waves, 2019, 39(2): 022101. doi: 10.11883/bzycj-2017-0284

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Influence of an enhanced injector on DDT process

doi: 10.11883/bzycj-2017-0284

Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China

Received Date: 2017-07-10
Rev Recd Date: 2017-10-18
Publish Date: 2019-02-05

Abstract

Abstract

In the flow where the shock wave, the flame and the jet exist simultaneously, the successful process of deflagration to detonation transition (DDT) is the key to the pulse detonation engine (PDE). One kind of injector was designed, and the feasibility of enhancing deflagration to detonation transition in detonation chamber was validated by numerical simulation based on C₂H₂/O₂/Ar reaction. The mechanism analysis of the hot spot initiating detonation was made. The device can excite instability in the flow field, generate eddies, and accelerate the exchange of energy and mass. The flow field generates hot spots, which accelerate the flame speed and catch up with the leading shock wave. The position of the ejector affects the velocity of the leading shock wave. Within a certain range, the higher the velocity of the leading shock wave is, the easier the hot spot generated by the collision will trigger the combustion-to-detonation transition process.
- pulse detonation engine,
- deflagration to detonation transition,
- injector,
- hot spot,
- flame speed

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References(21)

References

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