Effects of nozzles on performance of rotating detonation at different equivalence ratios

WANG Shunli; WU Yun; JIN Di; GUO Shanguang; ZHONG Yepan; YANG Xingkui

doi:10.11883/bzycj-2019-0481

Volume 40 Issue 10

Oct. 2020

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Article Navigation > Explosion And Shock Waves > 2020 > 40(10): 102102

WANG Shunli, WU Yun, JIN Di, GUO Shanguang, ZHONG Yepan, YANG Xingkui. Effects of nozzles on performance of rotating detonation at different equivalence ratios[J]. Explosion And Shock Waves, 2020, 40(10): 102102. doi: 10.11883/bzycj-2019-0481

Citation:

WANG Shunli, WU Yun, JIN Di, GUO Shanguang, ZHONG Yepan, YANG Xingkui. Effects of nozzles on performance of rotating detonation at different equivalence ratios[J]. Explosion And Shock Waves, 2020, 40(10): 102102. doi: 10.11883/bzycj-2019-0481

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Effects of nozzles on performance of rotating detonation at different equivalence ratios

doi: 10.11883/bzycj-2019-0481

1.
Key Laboratory of Airborne Plasma Dynamics, Air Force Engineering University, Xi’an 710038, Shaanxi, China
2.
Institute of Aero-Engine, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

Received Date: 2019-12-27
Rev Recd Date: 2020-06-11

Available Online: 2020-08-25

Publish Date: 2020-10-05

Abstract

Abstract

The impact of nozzle configuration on the performance of rotating detonation with different equivalence ratios was studied through tests on rotating detonating engines (RDEs) without a nozzle and with a convergent nozzle, a divergent nozzle and a convergent-divergent nozzle, respectively. Pre-combustion cracked kerosene and 30% oxygen-enriched air were used as the fuel and oxidizer, respectively. The results show that the rotating detonation engines can operate smoothly with the equivalence ratio ranging from 0.73 to 1.30. Three operating modes including single wave, unstable two counter-rotating waves and stable two counter-rotating waves were found in the experiments. The nozzle configurations strongly affect the mode transition and the detonation wave velocity. The convergent nozzle and the convergent-divergent nozzle can promote the generation of new detonation waves, making the working modes mainly to be two counter-rotating waves, while the detonation mainly operates in the single wave mode with a divergent nozzle installed. The results further show that the maximum propagating velocity deviates from the stoichiometric ratio when the convergent or convergent-divergent nozzles are installed, and the convergent-divergent nozzle can increase the detonation wave velocity.
- rotating detonation,
- kerosene pre-combustion cracking,
- nozzle,
- mode transition,
- wave velocity

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References(21)

References

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