Moore喷管内湿蒸汽非平衡凝结流动数值模拟

Numerical Analysis of Non-Equilibrium Condensation Flow of Wet Steam inside Moore Nozzle

摘要: 基于CFD方法开展湿蒸汽凝结流动研究，通过Moore四种喷管研究表面张力修正系数对湿蒸汽凝结流动中蒸汽参数与液相参数的影响。研究表明：不同表面张力修正系数在进口段与出口段结算结果一致，在喉部计算结果相差较大，选择合适的表面张力修正系数计算的结果与实验值误差更小，不同表面张力修正系数对液滴直径影响较大，液滴直径随着表面张力修正系数增大而增大，且表面张力修正系数大小影响蒸汽凝结位置。

Abstract: The study of wet steam condensation flow was carried out based on CFD method, and the influence of surface tension correction coefficient on steam and liquid phase parameters in wet steam condensation flow was studied by Moore’s four nozzles. The research shows that: the calculation results of different surface tension correction coefficients are consistent in the inlet section and the outlet section, but there is a big difference in the calculation results in the throat section. The error between the calculated results and the experimental values is smaller when selecting the appropriate surface tension correction coefficient. Different surface tension correction coefficients have a great influence on the droplet diameter, and the droplet diameter increases with the increase of the surface tension correction coefficient. The correction coefficient of surface tension affects the condensation position of steam.