CAJ | 학술논문

分析了4类风口模型(即基本模型、盒子模型、N点动量模型、主流区风口模型)在计算流体动力学中的应用以及在实际工程案例中的运行情况.在环境舱内进行了足尺实验,利用全方位热风速表测量了环境舱内的气流速度和温度场,并与4类风口模型的模拟结果进行比较.结果表明:基本模型与盒子模型并不适用于结构复杂的送风口模拟;基于N点动量模型和主流区风口模型的流体速度在工作区的模拟值与实测值的相对误差小于20%;在主流区风口模型中,送风口附近的气体速度模拟值与实测值的最大相对误差小于15%.证明主流区风口模型相对于其他3类风口模型而言,对于结构复杂的送风口模拟更准确,应用性更强.
분석료4류풍구모형(즉기본모형、합자모형、N점동량모형、주류구풍구모형)재계산류체동역학중적응용이급재실제공정안례중적운행정황.재배경창내진행료족척실험,이용전방위열풍속표측량료배경창내적기류속도화온도장,병여4류풍구모형적모의결과진행비교.결과표명:기본모형여합자모형병불괄용우결구복잡적송풍구모의;기우N점동량모형화주류구풍구모형적류체속도재공작구적모의치여실측치적상대오차소우20%;재주류구풍구모형중,송풍구부근적기체속도모의치여실측치적최대상대오차소우15%.증명주류구풍구모형상대우기타3류풍구모형이언,대우결구복잡적송풍구모의경준학,응용성경강.
This paper analyzes the applications of four air terminal device(ATD) models(i.e.,the basic model,the box model,the N-point momentum model,the jet main region specification model)in computational fluid dynamics(CFD)simulation and their performance in case study.A full-scale experiment is performed in an environment chamber,and the measured air velocity and temperature fields are compared with the simulation results by using four ATD models.The velocity and temperature fields are measured by an omni-directional thermo-anemometer system.It demonstrates that the basic model and the box model are not applicable to complicated air terminal devices.At the occupant area,the relative errors between simulated and measured air velocities are less than 20% based on the N-point momentum model and the jet main region specification model.Around the ATD zone,the relative error between the numerical and measured air velocity based on the jet main region specification model is less than 15%.The jet main region specification model is proved to be an applicable approach and a more accurate way to study the airflow pattern around the ATD with complicated geometry.