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中文核心期刊

球面聚心气相爆轰波传播过程的数值研究

Numerical investigations on propagation of spherically imploding gas

  • 摘要: 应用频散可控耗散格式对球面聚心气相爆轰波的传播过程进行了数值模拟研究. 通过跟踪波阵面上压力和温度变化,分析这些参数在爆轰波传播过程中的演变规律,及其与几何尺度和初始条件之间的依赖关系. 研究结果表明,仅在远场波面压力的变化近似只依赖于r/R,对称中心附近则需要考虑初始半径R的影响;波面压力与初始压力的变化呈线性关系;汇聚过程中温度升高比压力慢得多.

     

    Abstract: This paper reports numerical simulations of the propagation of sphericallyimploding detonations in H_2/O_2 mixture. One-dimensional Eulerequations in spherical coordinates were solved with the dispersioncontrolled dissipative (DCD) scheme, coupled to an elementary chemicalreaction model. The pressure and temperature behind the detonation wave weretraced to show their change tendency. Its dependency on the geometrical sizeand initial conditions were also numerically examined. It is found that thevariation of front pressure is representable in terms of approximatefunctions of r/R only outside the central zone. Linear relations existbetween the front and initial pressure. The front temperature increases muchslower than the pressure during implosion.

     

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