本文采用CFD方法,详细分析了空调用多翼离心风机叶道中的气流分布以及进气口偏心的影响.研究表明,风机叶道内存在大范围的气流分离现象.在后盘附近,存在分离现象的叶道约占2/3,主要分布在蜗壳内侧;而在"前盘"附近,几乎所有叶道都存在分离现象.在"前盘"附近,蜗舌下方的叶道中气流几乎停滞,蜗舌下游叶道为回流和尾缘旋涡所充满,至临近蜗壳出口侧,前缘旋涡逐步形成、发展并融合尾缘旋涡,最后衰减、消失.风机进气口向蜗壳内侧偏置适当距离,"前盘"附近叶道旋涡分布范围明显减小.
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