城市原生污水冷热源圆管紊流换热特性  

Research on turbulent pipe flow heat-transfer characteristic of urban wastewater as a cool and heat source

作　　者：吴荣华[1] 张成虎[1] 孙德兴[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2007年第2期281-284,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(5052054);中国博士后科学基金资助项目(20060390808)

摘　　要：城市原生污水是一种可再生性清洁能源,流动换热特性是其作为冷热源应用的关键性问题.将污水视为均质单项非牛顿幂律流,分析圆管速度、温度分布,为推导污水流动换热准则关联式,定义非牛顿流的特征黏度、特征雷诺数、广义普朗特数,基于紊流边界层三模式结构,得到换热准则关联式,对比理论与实验曲线.以特征雷诺准则、广义普朗特表示的努谢尔特数具有普遍意义,理论与实验曲线吻合.Urban wastewater is a reproducible resource, and the flow and heat-transfer characteristic is a key problem. Investigators used the single-fluid model to analyze the velocity and temperature field in the pipe, and defined the characteristic viscosity, general Reynolds rule and general Prandtl rule. Based on the threemode of turbulent flow, the rule-associated formula about the wastewater flow and heat-exchange in pipe was obtained. The Nu number expressed by Reu and Pr＇ had universality, and theory results matched the experiment curve.

关 键 词：城市原生污水 非牛顿流 广义雷诺数 广义普朗特数 换热特性 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]