1. Numerical comparison of pulse detonation engine attached with divergent nozzle
Authors : Nitin Kukreja
Pages : 97-103
Keywords : PDE, Detonation engine, Divergent-nozzle, Numerical prediction, Grid independence study Abstract :
Pulse Detonation Engine (PDE), a propulsion system, includes detonation of fuel to produce thrust more efficiently than current engine systems by enlargement of its mechanical simplicity and thermodynamic efficiency. The concept of PDE is old but has a great impact on efficiency of detonation engines. At present due to the behavior of unsteadiness this type of engine’s design optimizations are not completed and this leads one to improvise nozzle geometry via qualitative numerical predictions. This paper summarizes the computational behavior of Pulse Detonation Engine attached with the divergent nozzle, with the working medium of kerosene and oxygen mixture. Two different tubes are meshed for four separate angles. In addition, the effects of a transient detonation process and performance of the engine was computationally predicted using a two dimensional grid in a viscous domain and evaluated from subsonic to supersonic operation. Grid independence study is performed to eliminate/reduce the influence of the number of grids/grid size on the computational results. Pressure variation with the several time intervals are pictured for all test cases. Obtain result of this computational investigation provides that as the nozzle length is increased the responsible impulse is also increased. Overall, to find the quality amount of thrust, high divergence angle at the end of the tube are favored.