波纹倾角β对空气在波纹流道内的流阻与传热影响的数值分析  

Numerical Analysis of the Influence of Corrugation Inclination Angle β on the Air Flow Resistance and Heat Transfer in Corrugated Flow Passages

作　　者：吴华新[1] 孙刚[1] 周松[2] 田宝仁 

机构地区：[1]哈尔滨工程大学建筑工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学动力工程学院,黑龙江哈尔滨150001 [3]吉泰换热器厂,吉林四平136001

出　　处：《热能动力工程》2008年第5期531-534,558,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：空气-水波纹板式加热器不同于传统的肋片管式加热器,它是一次表面换热器,具有结构紧凑、高效的特点,可用于气-水加热与热能回收等场合。利用Fluent对空气在波纹倾角β=30°、45°和60°流道内的流阻与传热特性进行了模拟,计算了表面摩擦系数f、努塞尔数Nu及传热因子与表面摩擦系数的比值j/f,表明波纹倾角是影响空气在波纹流道内的流阻与传热过程的一个重要因素,通过比较可为进一步优化设计空气-水波纹板式加热器提供一定的参考。An air-water corrugated plate type heater differs from a traditional ribbed tube type heater.The former is a primary surface type heat exchanger and the surface of which in contact with a heat transfer medium directly takes part in a heat transfer process,featuring a compact structure and high efficiency.It can be used in such cases as air-water heating and heat energy recovery systems etc.to serve as hot wind curtains and air conditioner heaters etc.The authors have simulated the air flow resistance and heat transfer characteristics in flow passages at various corrugation inclination angles of β=30°,45°,60° by utilizing CFD(Computational Fluid Dynamics) software Fluent,and calculated the surface friction coefficient f,Nusselt Number Nu and the ratio of heat transfer factor and surface friction coefficient j/f.The results of the study show that the corrugation inclination angle is an important factor influencing the flow resistance and heat transfer process of air in corrugated flow passages.Through relevant comparisons,the above research findings can provide definite guidelines for the further optimized design of air-water corrugation plate type heaters.

关 键 词：空气-水波纹板加热器 流阻 传热 数值分析 

分 类 号：TK124[动力工程及工程热物理—工程热物理]