Numerical Simulation And Comparison Of Air Distribution Inside Gymnasium

In air condition engineering, designing of the air distribution is one of the most important parts. Airflow in air-conditioned room directly affects the indoor air environment and the energy of air conditioned in room. Air distribution depends on many facets, of which the airflow pattern and the parameters are the crucial facets.Since athletes'records can vary greatly depending on air velocities in sports hall, airflow pattern has played the most important role in the HVAC designing in gymnasiums.But in China, we do not have a air condition designing code for gymnasium. With regard to this status, HVAC designers and researchers have paid more and more attentions. Based on computational fluid mechanics and heat transfer theory, the thesis use the most popular numerical simulation software――FLUENT, to numerically simulates the air distribution of a gymnasium in Enshi City. Calculation results have been compared with the corresponding measuring results. Such comparisons show the validity of FLUENT in simulating indoor airflow pattern and temperature pattern in gymnasium. Then, simulations of indoor air distribution in gymnasium under three kinds of airflow patterns have been conducted by using FLUENT. By comparing the results, the conclusion provides that to form good airflow, it is better to set the outlet vents on the underside of the gymnasium when the inlet vents are on the ceiling. Finally, simulation the temperature and velocity of the indoor air under different ventilation parameters when the airflow pattern of the gymnasium is up given low return. The result supplies the optimization ventilation parameters for gymnasiums, of which the airflow pattern is up given low return. According to the different simulation results, proper designing about air supply outlets of HVAC system in gymnasium has been suggested in this paper.