对方形散流器送风口的数值描述方法及应用  

A numerical method for describing square diffusions and its application

作　　者：傅斌[1] 李晓冬[2] 

机构地区：[1]黑龙江科技学院,黑龙江哈尔滨150027 [2]哈尔滨工业大学,黑龙江哈尔滨150008

出　　处：《哈尔滨商业大学学报（自然科学版）》2004年第2期162-166,共5页Journal of Harbin University of Commerce：Natural Sciences Edition

摘　　要：在对室内空气流动进行数值模拟的过程中,对送风口的描述是影响模拟效果的重要因素之一.已有的风口模型相对于具体设备而言缺乏针对性,且不便于实际操作,不适应工程模拟的需要.为了寻求一种简便易行的描述方法,以工程中常用的方形散流器为研究对象,从其结构入手进行分析,得到流速分布曲线及计算式,进而提出新的描述方法.模拟过程中采用控制容积法离散方程,将流速定义在控制面上,并引入时间项作为松弛因子.通过模拟具体问题,预测出散流器出口附近的流速分布,并与实测结果比较,验证了描述方法的可靠性和可行性.最后应用模拟结果对传统的散流器设置方式提出改进意见.In numerical simulation of indoor airflow, the numerical methods for describing air supply openings affect the result seriously. The numerical methods have been given are not pertinent to some equipments. And it is difficult to use them in engineering numerical simulations.Presents a method to describe square diffusions by analyzing the structure of them. Gives the curve and the formula of distribution of velocity. The finite volume method is used. Velocity is defined at the surface of the cells. The time step is included in the discrete equations to act as a relaxation factor in their solution. The distribution of velocity at the outlet of square diffusion was given by simulation and was compared with the result of experiment. This method was reliable and feasible. Finally, proposes a new way to fit the square openings by analyzing the result of numerical simulation.

关 键 词：CFD 数值模拟 方形散流器 风口模型 气流组织 计算流体力学 

分 类 号：TU834.5[建筑科学—供热、供燃气、通风及空调工程]