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Indexed by:期刊论文

Date of Publication:2013-09-01

Journal:Transactions of Nanjing University of Aeronautics and Astronautics

Included Journals:EI、Scopus

Volume:30

Issue:SUPPL.1

Page Number:28-34

ISSN No.:10051120

Abstract:A new numerical method based on finite volume to simulate non-equilibrium flow is established by using the idea of Strang's splitting scheme. This uncoupling method is efficient to solve the stiffness problem of the non-equilibrium flow and is easy to implement for different chemical mechanism. The method is second order spatial and temporal accuracy in theory. For validating this method, the constant volume explosion, the H2/O2/Ar detonation and the phenomenon of oscillating combustion induced by shock in H2/Air mixing gas are simulated and the results agree well with experiment and other reference results. Then the influence of projectile's shape on the modes of oscillating combustion is studied. These projectiles are obtained by cutting a hemisphere by a plane. It is found that the oscillating frequency changes abruptly from 400 kHz to 75 kHz when the cutting angle varies from 18.2   to 18.8  .