基于场协同理论的混凝土温度场与水管冷却场换热机理研究

项目名称： 基于场协同理论的混凝土温度场与水管冷却场换热机理研究

项目编号： No.51309101

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 陈守开

作者单位： 华北水利水电大学

项目金额： 25万元

中文摘要： 近年来混凝土结构开裂现象频繁发生，水管冷却技术作为防裂重要措施，尚缺乏专门的理论研究，对其换热机理认识不足是制约其充分发挥温控效益的瓶颈。目前混凝土水管冷却数值算法还不能体现换热效率，采用的换热系数模型所基于的传统热阻理论尚存在缺陷，以及忽略混凝土与管壁接触传热的影响。为了阐明混凝土与水管换热的物理机制，通过审视其换热过程，将其分立为壁面接触传热、管壁传热和管内对流传热三个既衔接又独立的过程，并利用热弹性接触模型、牛顿冷却定律和场协同理论等方法，分别研究后整合开发出机理性的水管冷却场、混凝土温度场与应力场的耦合分析程序，实现模拟水管冷却动态过程的数值分析，并运用敏感性分析和数值反演等手段，识别冷却关键参数及其界限值，确定冷却效率与冷却方式、布置型式、水管材质等多种因素的量化关系，从而提出能反映换热效率的指标体系及综合评价方法，研究成果可为混凝土水管冷却优化与控制提供新的理论基础和模型算法。

中文关键词： 混凝土；温度场；场协同；水管；换热

英文摘要： Recently, crack of concrete structure occurs frequently. Pipe cooling technology, which is an important crack control measure, is short of special theory study. Especially, the heat transfer mechanism is not fully recognized, which restricts the effects of temperature control. At present, numerical algorithm of concrete pipe cooling has three problems: (1) can't reflect heat transfer efficiency; (2) existing flaw of heat transfer coefficient model which is built base on traditional thermal resistance theory (3) neglecting the influence of contacting heat transfer between concrete and tube wall. In order to clarify the physical mechanism of heat transfer between concrete and pipe, this subject survey its heat transfer process and divide it into three cohesion and independent process which are contacting heat transfer between concrete and tube wall, heat transfer through tube wall and convective heat transfer in pipe flow. And then, the three heat transfer process is separately studied by thermal elastic contact model, Newton's law of cooling and field synergy theory. Based on the studying, a mechanical coupling analysis program of cooling field, concrete temperature field and creep stress field is developed to realize the numerical analysis of dynamic process of pipe cooling. The key cooling parameters and thresh

英文关键词： concrete；temperature field；fiedl synergy；pipe；heat transfer