超临界压力流体管内对流传热及自激热声振荡的研究

项目名称： 超临界压力流体管内对流传热及自激热声振荡的研究

项目编号： No.51206040

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 毛宇飞

作者单位： 河海大学

项目金额： 25万元

中文摘要： 超临界压力流体的传热具有特殊性，其根本原因是流体的热物理性质在拟临界区内会发生剧烈变化。在一定的热力条件下，超临界压力流体传热过程中还会产生由热声效应引起的压力振荡。变物性传热和热声振荡这两种本质上十分复杂的物理现象可以耦合在一起，研究这一问题既有挑战性又极有意义。本项目以超临界压力流体在圆管内的对流传热和在Rijke管内的自激热声振荡为研究对象，通过理论分析、数值模拟和实验，重点揭示管内超临界压力流体对流传热中浮力的影响机理、Rijke管内超临界压力流体自激热声振荡的形成机理、以及Rijke型传热管内超临界压力流体热声振荡和对流传热的耦合机理。本项目的研究成果可以为相关超临界压力流体高新技术的研究与开发提供科学依据，并且可促进传热理论和热声理论的进一步发展，具有重要的工程应用价值和学术价值。

中文关键词： 超临界压力；边界层；对流传热；计算模型；摩擦阻力

英文摘要： The peculiarity of the heat transfer to the supercritical pressure fluid is primarily attributed to the great variation in the thermal physical properties of the fluid in the pseudo-critical region. Thermoacoustic pressure oscillations can also happen during the heat transfer to the supercritical pressure fluid under certain conditions. It would be challengeable and innovative to investigate the thermoacoustic oscillations self-excited in connection with heat transfer to a flow of the supercritical pressure fluid in tubes. Based on theory analysis, numerical simulation, and experiment study, the characteristics and mechanism of the buoyancy effect in the convective heat transfer to the supercritical pressure fluid in round tubes, the characteristics and mechanism of the self-excited thermoacoustic oscillations to the supercritical pressure fluid in the Rijke tubes, and the coupling mechanism between the self-excited thermoacoustic oscillations and the convective heat transfer to the supercritical pressure fluid in the Rijke type heat transfer tubes, will be revealed. The results of the project are of important engineering and academic significance, which can afford scientific basis for the research and development of new supercritical pressure fluid technologies and accelerate the theory of heat transfer and the

英文关键词： supercritical pressure；boundary layer；convection heat transfer；calculation model；frictional resistance