Order in Rotating Fan with 7 blades -- CFD Online Discussion Forums

June 24, 2019, 09:28	Order in Rotating Fan with 7 blades	#1
AS_Aero Senior Member Join Date: Mar 2013 Location: Germany Posts: 357 Rep Power: 14	Hi All Does anyone have experience in the cooling fan order calculation which is based on the Acoustics topic. I am wondering how to calculate the 7th order ,14th order , 30th order etc to identify the noise level in that order. Is it similar to the blade passing frequency ? Thanks in advance !!

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