| Nowadays, the humanity is getting higher and higher in the request of indoor air conditioning environmental quality. Indoor environment control in large-space construction, like Stadium, influences the indoor air distribution on account of a host of factors, it is difficult to reveal air distribution rules and so on semi-rational formula, the regular design method is also too difficult to analyze and appraise its organization of air flow accurately. In recent years, along with the proliferation of the progress of computer technology and application of high-speed computer, the capability to figure out the values is more advanced and efficient, thereby having created the condition for flow organization by the theory hydromechanics computation air directly. Computational Fluid Dynamics is a new science which follows computer's development, it is convenient to construct the simulation analysis on the internal environment to the large space by adopting CFD, forecast further and precise information of the air distribution, and getting the indoor temperature, humidity, speed and visualization effect chart internal parameters and thus instruction the design with direct-viewing, in order to instrument the design and enhance "the performance" the design level. This article carries on the numerical simulation and the analysis using the CFD method to the stadium construction air flow organization.The object of study in this article is the indoor environment of Xi'an stadium, adopting the blast method of lamination air conditioning, the paper has analyzed through the orthogonal experiment and then obtained:the significant influencing factors of the stadium free-stream organization's factor (side to deliver) according to its importance in turn is the nozzle angle, the mounting height and the jet firing distance. Through establishing the orthogonal experiment table to them, picking nine typical models of operating modes which are carried on the simulation analysis, the ADPI value which is worked out by the analogue result computation, and then the analysis obtains the optimum design plan:The jet flow firing distance is 31.5m, the nozzle angle 15°, the nozzle installs high 17.5m, analogue result of preferred plan indicated that its ADPI value achieved 86.7%, meanwhile which has proven the accuracy of orthogonal experiment. The paper takes consideration of characteristics of building, and the function which is generated by indoor personnel to shoulder to the big spatial air conditioning's influence under the situation of simulating the different booking rate (100%,82.5%,70%) in the situation, and considered emphatically radiated the plumose air current which by the indoor personnel formed to the non-isothermal air conditioning jet flow heat to float rises to affect the influence based on the traditional non-uniform temperature jet flow theory's foundation, obtained the plumose air current which through the simulation (audience) formed by the indoor heat source, the most degree of the air conditioning cooling blast raised near 20-30cm. Confirmed the non-district single line nozzle side to deliver the effect to be inferior to the two-row nozzle minute far short-range blast effect. When computing the lamination air conditioning load, to determine the indoor personnel shoulder according to the average booking rate value is economical.
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