流体机械

1992, (11) 28-32+80

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平均流速对风机系统气柱固有频率影响的研究
The Research on the Influence of the Mean Flow velocity on Gas Colunm Natural Frequency of Centrifugal Fan System

陈玲莉,黄幼玲
Chen Lingli

摘要(Abstract):

研究了平均流速对风机系统气柱固有频率的影响,建立了风机的边界条件,用小波动理论和一维非稳定气流理论作了计算与分析,同时在运行与静止的条件下对系统气柱固有频率进行了测试,并与计算比较。结果发现,平均流速对系统气柱固有频率有影响,较高的流速使气柱固有频率向小的方向飘移。
The boundary conditions of the fan system had been set up in this paper. The gas colunm natural freqency of the centrifugal fan system were measured in dynamical state and static state respectively, and it was computed with the small wave equation and in terms of the one dimension unstable stream theory. The results above show that the mean-flow-velocity will effect on the gas colunm natural frequency, the higher mean flow velocity the lower gas colunm natural frequency will.

关键词(KeyWords): 风机系统;平均流速;气柱固有频率

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作者(Author): 陈玲莉,黄幼玲
Chen Lingli

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