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摘要
A 3-D simulation tool (DEST, Detonation Simulation tool) for hydrogen detonation during severe accident has been developed. The compressible three-dimensional Euler equations in Cartesian coordinate system are solved by a second-order additive semi-implicit Runge-Kutta method with 5th weighted essentially non-oscillatory scheme (WENO) and Steger-warming flux vector splitting approach handling the convection flux. The multi-blocking patching method is used to handle the flow problem of complex geometry. Afterward, the hydrodynamics solver is tested by applying DEST to the classical shock tube problems, and the results show that hydrodynamics solver can capture the shock wave correctly and give a detailed description of shock wave even if the gradient of pressure, density or velocity is large. Then two detonation experimental tests of RUT facility are simulated by DEST, and the comparisons between the predicted results and experimental data show a reasonably good agreement. Furthermore, DEST is applied to a hypothetical detonation in two connected compartments of containment. The predicted results show that the maximum pressure and temperature always occur at the corner of the compartment. The influence of ignition position is analyzed and the results show that the pressure tended to be larger when the mixture is ignited at a farther location. The DEST can be used to analyze the pressure and temperature load during detonation process under severe accident and has guidance on the strategy of hydrogen mitigation.
- 出版日期2017-6
- 单位西安交通大学; 中国核动力研究设计院
