Simulation And Optimization Of Indoor Airflow Organization In A Large Space

Based on Computational Fluid Dynamics(CFD),CFD technology combined with modern computer technology provides modern scholars with a more convenient means means to predict the distribution of airflow in high-space and effect of different air-conditioning designs.Reasonable indoor airflow organization can improve the quality of the building air conditioning system design,ensure the thermal comfort of the air conditioning area,and control the building energy consumption.In this paper,ICEM CFD and Fluent software are used for modeling and calculation.Taking the indoor water park in Changchun,Jilin Province as the research object,the indoor space airflow organization is simulated and the temperature field and velocity field distribution of different air conditioning design schemes are obtained.Through the analysis and comparison of different working conditions,it provides a certain basis for the optimization of air conditioning design of the building and the same type of buildings.In the process of building the model,the paper first calculates and verifies the selection of the tuyere model.Based on the calculation results of the classic jet formula,the accuracy of the calculation results of the traditional model and the basic model are compared,and finally selects the traditional model as the tuyere model of this paper.The calculation results of the traditional model are more in line with the jet law of the spherical nozzle selected in this paper.In the process of simulation calculation,this paper first studied the simplified model.In view of the high-span structural characteristics of the water park,the paper analyzes the specific influence of the parameters of the air outlet height,air supply speed,air supply distance and air supply angle on the spatial distribution of space airflow.This provides the basis for an air conditioning design that will be followed by a complete building model.On this basis,the paper carries out the simulation calculation of the overall building space,compares and analyzes the calculation results of the initial design scheme and the optimized design scheme,and draws the following conclusions:for large-span space,the single-layer air outlet cannot complete the task of air stratification.The uniformity of airflow distribution in the work area is poor,and the human body is uncomfortable.The double-layer air outlet-can realize spatial stratification to a certain extent,the air distribution in the working area is more reasonable,and the daily running cost of the air conditioner can be reduced.