Numerical Simulations of Detonation in Converging Chambers

抄録

A multi-dimensional numerical algorithm for detonation gas dynamics is described. The algorithm consists of a dispersion-controlled shock-capturing scheme and a pseudo-kinetic chemical reaction model. One-dimensional results obtained with this algorithm appear to be in good agreement with both the experimental data and self-similar solutions of gaseous detonation. This implies that coefficients of the pseudo-kinetic reaction rate are well tuned. Results of two-dimensional detonation computations in converging chambers reveal some global features which agree with the experimental findings, and can be explained using shock wave dynamic theory. It is shown that the numerical algorithm proposed is capable of predicting the pressure, temperature, and density ratio of detonations in a way suitable for engineering applications. The algorithm can be extended to three-dimensional problems.