【摘要】 建立某型号局部通风贯流风机的三维几何模型,完成其额定工况下风机内部的非稳态流场数值计算,并进一步完成风机远场气动噪声的频谱计算,对贯流风机内部的非稳态速度场、压力场以及声功率级的分布规律进行了深入分析,研究了贯流风机非稳态内流场及气动离散噪声的基本规律。研究结果可为贯流风机的优化设计提供依据,对风机降噪和整体性能提升具有重要指导意义。更多还原

【Abstract】 3D geometrical model of a local cross-fl ow fan was established, and numerical calculation on its inner unsteady flow field at rated operation mode was conducted, and then spectrum calculation of distant aerodynamic noise of the fan was completed. In addition, unsteady velocity field, pressure field and the distribution of the sound power level inside the fan were analyzed, and the basic laws of the unsteady inner fl ow fi eld and aerodynamic discrete noise of the fan were studied. The study results offered reference for the optimization design of the cross-fl ow fan and possessed guidance for noise reduction and overall performance enhancement.更多还原