Abstract: A dynamical storage/deletion algorithm for acceleration of chemical reaction calculation is proposed which deals with stiff chemical source term in reactive flows.The algorithm is applied to two-dimensional gaseous detonation.Two deletion approaches, global deletion and node deletion,are developed and compared with traditional direct integration(DI) algorithm.It shows that the proposed algorithm ensures computational accuracy and relaxes stringent limitation on computer memory.With fixed size of data table,computational speedup factor increases with increament of tolerance error.With same tolerance error,speedup factor of node deletion approach is higher than that of global deletion.The algorithm shows advantages in solving transient reactive flows.

Key words: accuracy and effeciency of chemical reactions, dynamical storage/deletion, detonation wave, numerical simualtion