综合空调房间气流组织与气动噪声研究

In this paper, an integrated flow-field model of the indoor air-conditioner and interior space was established. A numerical calculation of the whole air-conditioned room with heat exchanger was made on isothermal flow conditions using large-eddy simulation ，and the near and far field radiated noise frequency spectrum on the tongue, volute and impeller surface which were the major acoustic sources was analyzed. Obtained the distribution of airflow at different speeds ，showed the appropriate speed range of air-conditioning. some Vortex distribution of aerodynamic characteristics was got，and there were four characteristic frequencies in impeller near field and one in far field. It Provided a reference for follow-up experimental study.