混水器内部物理量场的数值模拟分析  

Numerical simulation analysis of water mixers internal physics field

作　　者：曲云霞[1,2,3] 王欢欢[1] 

机构地区：[1]山东建筑大学热能工程学院,山东济南250101 [2]可再生能源建筑利用技术教育部重点实验室,山东济南250101 [3]山东省可再生能源建筑应用技术重点实验室,山东济南250101

出　　处：《山东建筑大学学报》2017年第2期111-117,124,共8页Journal of Shandong Jianzhu University

摘　　要：混水器中冷水和热水混合的不均匀,会导致出水温度的不恒定,混水器内部物理量场的数值模拟分析能够优化冷、热水混水器的结构,使其在工程应用上更加节能合理,从而实现降低能耗的目标。文章基于Fluent软件的RNG k-ε湍流模型,模拟了冷、热水混水器内部的三维流动传热特性,通过对混水器内部温度场和压强的分析,阐明了入口位置对其内部内部物理量场及混合效果的影响。结果表明:入口速度较小为0.1 m/s时,三种模型的温度分布图较为接近;随着入流速度的增大,对冷、热水水平切向流入的模型1和模型2的出流温度更加恒定,并趋于300 K,而冷热水从上侧流入的模型3的出流温度则变得上下波动不定;3种模型混合效果中,模型1的混合效果最佳,模型3的混合效果最差。In the mixer,cold and hot water mixed uneven will not lead to constant water temperature. The simulation analysis of the water mixers internal physics field can optimize the structure of the water mixer and make it more efficient in engineering application,thus reducing energy consumption. The paper simulates internal three-dimensional flow and heat transfer characteristics on the the cold and hot water mixer based on RNG k -εturbulence model in Fluent software,and elaborates the influence of entrance position on its internal physics field and mixing effect through the analysis of mixers＆#39;internal temperature field and pressure.The results show that when the inlet velocity is smaller than 0.1 m/s,the temperature distribution of three kinds of models is close.With the increase of flow velocity,the outlet temperature of the cold and hot water horizontal tangential flows into the model one and model two is more constant,and the outlet water temperature is constant,which tends to 300K,while the temperature of the hot and cold water flows from the upper side of the model three is not constant.Among the three models,the mixed effect of model one is the best,but that of model three is the worst.

关 键 词：混水器 混合效果 物理量场 数值模拟 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]