流体机械2016，Vol.44Issue(6)：34-37,55,5.DOI:10.3969/j.issn.1005-0329.2016.06.007
叶片外缘外伸对贯流风机效率及噪声的影响
Influence of the Extended Blade on Efficiency and Aeroacoustic Noise of a Cross-flow Fan
摘要
Abstract
Using k-εturbulence model and PISO arithmetic,the efficiency and noise between a baseline fan and a controlled fan with extended blades was contrasted.The result shows that overall pressure efficiency increases by 3.8% in the control case. Through F W H equation based on Lighthill's acoustic analogy,the noise is reduced about 7dB at the monitor point in the control case.Finally,Powell vortex sound equation was used to explain the mechanism of reduction of the noise.关键词
贯流风机/全压效率/气动噪声/FWH 方程/涡声方程Key words
cross-flow fan/overall pressure efficiency/aeroacoustic noise/ffowcs williams-hawkings equation/powell vortex sound equation分类
机械制造引用本文复制引用
王建明,马树元,申振华,何朝锋,朱建勇..叶片外缘外伸对贯流风机效率及噪声的影响[J].流体机械,2016,44(6):34-37,55,5.基金项目
辽宁省自然科学基金项目 （）
