多循环脉冲爆震发动机流场数值研究

Numerical investigation of multi-cycle pulse detonation engine

1.
National Key Laboratory of Aerodynamics Design and Research, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China;
2.
Center for High Performance Computing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China

摘要: 针对二维带有收敛扩张喷管的脉冲爆震发动机模型，采用带基元化学反应的Euler方程组和H2、空气的9组分20基元反应，对发动机在前六个工作循环的流场进行了数值模拟。通过对前几个循环流场进行比较，发现脉冲爆震发动机在第五个循环后流场就基本稳定，单循环得到的流场和多循环稳定后的流场有很大的差别，同时喷管对发动机内流场影响特别大。
- 爆炸力学 /
- 流场 /
- 基元化学反应 /
- 脉冲爆震发动机 /
- 多循环
Abstract: Numerical simulation of the flow field of multi-cycle pulse detonation engine (PDE) is helpful for understanding the engine principle and performance analysis, and can provide the useful information for PDE design. The reactive Euler equations and a 9-species, 20-elementary-reactions model for hydrogen-air combustion were used to simulate the flow field of the first six cycles for a simplified two-dimensional PDE with a convergent-divergent nozzle. Results show that there are many distinctions between the single cycle and final steady flow fields. It needs five cycles until the flow fields reach the steady state, and the nozzle plays an important role in the engine internal flow.
- mechanics of explosion /
- flow field /
- elementary chemical reaction /
- pulse detonation engine (PDE) /
- multi-cycle