Noise boiler fan manufacturers _ Henan boiler manufacturers centrifugal fan to fan aerodynamic noise, mainly in nature can be divided into discrete noise and broadband noise. Its aerodynamic noise produced mainly by gas and the interaction of the volute and impeller blades, and through the inlet, outlet channel for dissemination. Volute special three-dimensional shape of the unsteady flow field and the housing so that it becomes difficult to carry out research Company Name: Henan Hong Blower Co., Ltd. Company website: www.henanhongjifengji.com Sales Department: 0394-7892627 15518086290 QQ: 445528270