円管内における水素自着火挙動に関する数値解析

抄録

Spontaneous hydrogen ignition inside and outside the tube is simulated by two-dimensional axisymmetric calculation with detailed chemical model in order to estimate the shock heated region and the effect of tube length on the spontaneous ignition. From comparison of shock propagation speed with experimental and theoretical results, the present results show good agreement and are validated. The volume of shock heated region does not change very much regardless of burst pressure under the condition that the position of shock wave from the diagram is the same. On the other hand, ignited volume increases as the burst pressure increases. Spontaneous ignition is likely to occur when the tube length increases due to the increment of shock heated region and ignited region.