万剑峰;杨爱玲;

• 1:上海理工大学
• 2:河南理工大学

摘要(Abstract)：

在半消声室内对不同转速的开式叶轮的噪声进行测量。依据在对称位置的测量的噪声信号具有一定相关性,分别对旋转噪声中的2类噪声(厚度噪声、载荷噪声),进行不同测量方位、转速和频域下的分析。分析结果表明:在开式叶轮气流的下游测量方位,由于处在湍流声源的近场区域,Leq(连续等效A声压级)噪声变小,而相应的上游位置由于受湍流噪声的辐射而Leq变大;旋转噪声的Leq随转速上升而上升,厚度噪声所占份额随转速变化有下降的趋势,载荷噪声所占份额无明显变化;在频域下也发现在8倍叶片通过频率前,2类噪声都呈急剧下降趋势,8倍叶片通过频率后,两类噪声缓慢下降,并逐渐趋向于0。

关键词(KeyWords)： 开式叶轮;相关分析;厚度噪声;载荷噪声

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50976072);; 上海市教委重点学科建设项目(J50501)

作者(Author): 万剑峰;杨爱玲;

Email:

DOI:

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