高速掺气水流可压缩性研究

项目名称： 高速掺气水流可压缩性研究

项目编号： No.51279216

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 张宏伟

作者单位： 中国水利水电科学研究院

项目金额： 76万元

中文摘要： 高速水流掺气是水电工程中一种常见而又重要的流动现象。水流掺气以后声速将显著降低，流动可压缩性效应明显增强。研究高速掺气水流的可压缩性效应，揭示其流动规律与特殊现象是一项有意义的研究课题。本研究将通过理论分析与数值模拟结合的方法，建立掺气水流声速模型，深入揭示掺气水流声波的传播规律、衰减机理及色散特性，研究亚、跨、超声速掺气水流运动规律，揭示超音速掺气水流的激波特征,确定激波前后掺气水流压力、掺气浓度等参数的变化规律，发展求解可压缩水气两相流的数值算法，模拟分析具有自由面的掺气水流可压缩流动特征，研究泄洪洞掺气水流临界流现象，提高对超高速掺气水流的认识，为工程实践提供理论支撑。

中文关键词： 掺气水流；声速；相间作用；可压缩性；

英文摘要： High speed aerated flow is a common and important flow phenomena in hydraopower project. After aerated the sound velocity of the flow will decrease significantly, as a result the flow compressibility effect become important. Study the compressibility effects of high velocity aerated flow to reveal the flow characteristics and special phenomena is a meaningful research topic. By theoretical analysis and numerical simulation methods, this study will establish aerated flow sound velocity model, reveal the aerated flow acoustic propagation, attenuation mechanism and dispersion characteristics, investigate the movement law of subsonic, transonic, supersonic aerated flow, reveal the the supersonic aerated flow shock wave characteristics, determine the pressure, air concentration and other field parameters distribution before and after shock wave, develop numerical algorithm for solving the compressible water-air two-phase flow, simulate and analysis the flow features of compressible aerated flow with free surface, study the critical flow phanomenon in discharge spillway tunnel, improve high-speed aerated flow awareness, provide technical support for the engineering design.

英文关键词： aerated water flow；sound velocity；interphase effects；compressibility；