基于气液两相流模型的水轮机数值模拟研究进展

摘要

随着水电站机组容量不断增大和计算机技术的飞速发展,传统的数值模拟手段已不能满足人们对深入分析水轮机性能的要求,因此更贴近实际、结果更准确的基于气液两相流模型的数值模拟越来越受到人们的关注。介绍了气液两相流动的主要计算模型,概述近年来国内外水轮机气液两相流数值模拟进展,重点阐述在其应用于水轮机空化性能、尾水管压力脉动等方面的研究成果和应用前景,并对需要进一步深入研究的问题及研究中应遵循的一些原则作出初步探讨。%With the development of water turbines′ capacity and computer technology,people start to focus on the need for accurate numerical simulation to analyse turbines′ internal flow.The Gas-Liquid two-phase flow model which is closer to actual is now drawing more and more attention from people.This article will be followed by a brief instruction of main Gas-Liquid two-phase flow models and an overview of latest international progress of water turbine′s Gas-Liquid flow based numerical simulation.Details on applications in water turbines′ cavitation and draft tube′s pressure pulsation are described in later sections.Finally,it shows a discussion on problems and methods to solve them.