Numerical Simulation And Optimization Of Air Distribution In Large Space

Common design methods can not be used to analyze and assess airflow accurately in large space buildings such as industry workshop. Experimental study and numerical simulation study are two most important methods to explore the principle of air distribution. Experimental study needs relatively long cycle and much running cost, but numerical simulation study not only needs short cycle and little running cost but also can be convenient to carry on the comparison of the multi-plans. It may improve the design of the concentration field with the velocity field and temperature concentration field that is gotten from the numerical simulation. In recent years, with the development of computer industry and Computational airflow thermal Dynamics, it becomes possible to simulate and predict air distribution, so numerical simulation study is being more and more applied.This article uses the three dimensional steady Navier-Stokes equations and turbulent flow model, carries on the value simulation of air current organization of workshop. The paper makes a contrast analysis on the actual measured data and the analogue of workshop ,confirms the feasibility of the CFD method and the reliability of result ; In order to optimize the air current organization of the workshop, proposes nine kinds of different plans, Firstly, uses the value simulation method to obtain the chart of air flow field cloud , selects the optimal three kinds of plans, secondly, through carrying on the model experiment by these three kind of plans, measures the data of the corresponding velocity field, makes the air current nonuniformity coefficient as the appraisal target, carries on an analysis and a contrast to the result, obtains the optimal plan, explores the corresponding optimized rule.For years, design of air distribution of large space buildings is based upon experience, and there are no special quantitative requirements in the code. The essay achieves the simulation of the air distribution of large space buildings with CFD and proves the conclusion of the simulation through tests: therefore it provides the feasibility to evaluate the design standard of air distribution in large space buildings by means of the not even coefficient and may serve as a reference to the design of large space buildings.