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首页> 外文会议>MIT Conference on Computational Fluid and Solid Mechanics >Primitive variable solver for modeling steady-state and time-dependent laminar flames with detailed chemistry and transport properties
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Primitive variable solver for modeling steady-state and time-dependent laminar flames with detailed chemistry and transport properties

机译：用于使用详细的化学和运输性能建模稳态和时间依赖层的火焰的原始变量求解器

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摘要

A primitive variable solver for modeling steady-state and time-dependent laminar diffusion flames has been developed for non-staggered grids. The approach employs Newton's method with an implicit discretization in time. A preconditioning technique is used to improve convergence in the low Mach number regime. Simple but efficient solutions have been found to remove the pressure-velocity decoupling. Two methods have been developed: one which is first order in space and time; and another which is higher order. The latter employs a second-order-accurate Crank-Nicholson method in time and a compact scheme for spatial discretizations with third order accuracy on non-uniform grids. The results of time-dependent flame calculations with detailed chemistry and transport are presented.
机译：用于建模稳态和时间依赖层状扩散火焰的原始变量求解器用于非交错网格。该方法采用牛顿的方法及时隐性离散化。预处理技术用于改善低马赫号的收敛。已经发现简单但有效的解决方案除以压力速度去耦。已经开发了两种方法：一个是空间和时间第一阶的一个;另一个是更高的顺序。后者在时间上采用二阶 - 准确的曲柄-Nicholson方法和紧凑的方案，用于在非均匀网格上具有三阶精度的空间离散化。提出了具有详细化学和运输的时间依赖性火焰计算的结果。

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