非预混喷注对旋转爆震发动机影响的数值研究

doi:10.7527/S1000-6893.2015.0195

Abstract

Abstract:

In order to study the operation process of rotating detonation engine (RDE) with separate supply of fuel (H₂) and oxidizer (Air) in the real situation, a reduced kinetic mechanism based on 7-step reaction and 8 specie is used to simulate three-dimensional RDE, and the transport processes such as thermal conduction,diffusion and viscosity are ignored. The flow field structure of RDE and the influence of fuel injection strategies on RDE characteristics are discussed in detail. Results show that:the numerical method used in this article can simulate the flow field structure of the RDE effectively; In a given calculation condition, different injection schemes are comparatively studied. The average propagation velocity of rotating detonation wave changes from 1 640 m/s to 1 840 m/s and the average thrust of the rotating detonation engine changes from 90 N to 100 N. The specific impulse based on mixtures changes from 820 m/s to 900 m/s. As the injection position moved forward, the RDE characteristics are obviously improved. But the change of the injection angle has a little influence. As the injection angle decreases, the RDE performance is gradually improved. The RDE performance with the double side injection method was much better than that with the unilateral injection. The RDE performance is proportional to the mixing effect. The study provides some references for the further research of RDE.

Key words: rotating detonation, flow field structure, injection schemes, numerical simulation, engine performance

CLC Number:

V235

XU Xueyang, ZHUO Changfei, WU Xiaosong, LI Jie, MA Hu. Numerical simulation of injection schemes with separate supply of fuel and oxidizer effects on rotating detonation engine[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(4): 1184-1195.

References

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Numerical simulation of injection schemes with separate supply of fuel and oxidizer effects on rotating detonation engine

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