利用湍流流动双方程模型对大型锅炉燃烧室流动过程进行数值模化,遇到的最大困难是收敛问题。为了寻求加速收敛的途径,本文首先将共轭梯度算法引入流场计算中,并将它的收敛特性与常用的SIMPLE方法收敛特性作了对比分析,论证了优化算法中的共轭梯度法是保证速度场计算收敛的切实可行的有效方法。 Using turbulent flow two-pass model to simulate the flow in a large boiler combustion chamber, the biggest difficulty encountered is the convergence problem. In order to find a way to accelerate the convergence, this paper first introduces the conjugate gradient algorithm into the flow field calculation, and compares its convergence characteristics with the convergence characteristics of the commonly used SIMPLE methods. It proves that the conjugate gradient method in the optimization algorithm is a guarantee A practical and effective method of calculating the convergence of velocity field.