Numerical Investigation of Detonation Combustion Wave in Pulse Detonation Combustor with Ejector

Authors

1 Department of Mechanical Engineering, National Institute of Technology Agartala, Tripura, India, 799046

2 Department of Mechanical Engineering, National Institute of Technology Silchar, Assam, India, 788010

Abstract

Detonation combustion based engines are more efficient compared to conventional deflagration based engines. Pulse detonation engine is the new concept in propulsion technology for future propulsion system. In this contrast, an ejector was used to modify the detonation wave propagation structure in pulse detonation engine combustor. In this paper k-ε turbulence model was used for detonation wave shock pattern simulation in PDE with ejectors at Ansys 14 Fluent platform. The unsteady Euler equation was used to simulate the physics of detonation wave initiation in detonation tube. The computational simulations predicted the detonation wave flow field structure, combustion wave interactions and maximum thrust augmentation in supersonic condition with ejectors at time step of 0.034s. The ejector enhances the detonation wave velocity which reaches up to 2226 m/s in detonation tube at same time step, which is near about C-J velocity. Further the time averaged detonation wave pressure, temperature, wave velocity and vortex characteristics interaction are obtained with short duration of 0.023s and fully developed detonation wave structures are in good agreement with experimental shadowgraph, which are cited from previous experimental research work.

Keywords

Journal of Applied Fluid Mechanics
Volume 10, Issue 2
March 2017
Pages 725-733

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