The three-dimensional unsteady flow field in a centrifugal fan is numerically simulated,where Navier-Stockes equations are adopted and RNG k-epsilon turbulence model is chosen.

• 此外,还尝试运用一种新的方法,即不用求解声场而直接依据非定常流场中的静压脉动分析了蜗舌处主要气动噪声源的位置及其成因。