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本文阐述了由一组离心通风机的计算值或无因次特性参数，来确定离心通风机的叶轮外径，该法简便、实用。文中给出了相应的算例，借以来验证该法的可靠性。
In this paper, the calculation of a set of centrifugal fan or dimensionless characteristic parameters to determine the centrifugal fan impeller diameter, the method is simple and practical. The corresponding examples are given in the paper to verify the reliability of the method.