文献类型：期刊文献

英文题名：Noise prediction in design of low pressure rotor-only axial fans

作者：Zhang, Jie[1]; Zhou, Shaoping[1]; Ge, Xiaoling[1]

机构：[1] East China University of Science and Technology, Shanghai, China

年份：2011

卷号：1

起止页码：815

外文期刊名：ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011

收录：EI(收录号：20124715696838)

语种：英文

外文关键词：Design - Boundary layers - Forecasting - Application programs - Axial flow turbomachinery - Turbulence - Atmospheric thermodynamics - Acoustic noise - Boundary layer flow - Aeroacoustics

摘要：A noise prediction program has been incorporated into a blade design process of the arbitrary vortex flow rotor-only axial fans which are widely used in low pressure applications. Parametrical studies of different geometrical designs are conducted to investigate the influence on noise radiation from axial fans. The noise prediction program is based on the Carolus's semi-empirical model' in which the broad-band aeroacoustic noise is mostly attributed to three independent sources: incident turbulence' turbulent boundary layer' and blunt trailing edge. In addition' the well-known Fukano's vortex shedding model is also utilized for indicative comparison. It is indicated that the total sound pressure level is most sensitive to the flow relative velocity' while the chord length can be considered as a secondary cause. Copyright ? 2011 by ASME.