火箭推进2026，Vol.52Issue(2)：61-74,84,15.DOI:10.3969/j.issn.1672-9374.2026.02.007
适用于非结构网格的气液相变准稳态VOF模型
A quasi-steady-state VOF model for gas-liquid phase change on unstructured meshes
姚霄 1杨建文 1刘计武 1胡海峰 1周立新1
作者信息
- 1. 西安航天动力研究所 航天液体动力全国重点实验室,陕西 西安 710100
- 折叠
摘要
Abstract
Gas-liquid phase change phenomena(e.g.,evaporation and condensation)are commonly encountered in liquid rocket engines.However,existing phase change models generally rely on empirical coefficients and often require experimental calibration.To enable engineering computations of gas-liquid phase change without reliance on empirical parameters and further facilitate coupled simulations of phase-change-involved flows and combustion,a quasi-steady-state phase change model based on the VOF method and applicable to unstructured meshes is proposed.This model identifies phase interfaces based on phase volume fraction distribution,determines the direction of phase change using Clausius-Clapeyron equation,and constructs a unified-form phase change source term under the quasi-steady-state assumption,which is extended to unstructured meshes via the concept of characteristic length.The model is applied to several typical phase change processes,including the Stefan problem,film boiling,bubble condensation,Venturi tube cavitation,and droplet evaporation combustion.The results demonstrate that the model can accurately identify phase interfaces on unstructured meshes,and the computed flow field parameters agree well with theoretical and experimental data,providing a reliable phase change model for engineering simulations of phase-change-involved flows and combustion.关键词
相变模型/蒸发凝结/准稳态/非结构网格Key words
phase change model/evaporation and condensation/quasi-steady-state/unstructured meshes分类
航空航天引用本文复制引用
姚霄,杨建文,刘计武,胡海峰,周立新..适用于非结构网格的气液相变准稳态VOF模型[J].火箭推进,2026,52(2):61-74,84,15.
