Research on Noise Optimization of Multi Wing Centrifugal Fan for RV Air Conditioning
In response to the problem of excessive noise from the air conditioning fan of a certain RV,the method of reducing noise by using a low-speed large impeller is adopted.Increase the diameter of the fan from 120 mm to 140 mm and redesign the matching air duct profile and volute tongue.Under the condition of keeping the blade shape of the wind turbine unchanged,orthogonal design is carried out for the number of blades and blade width.The efficiency of all or-thogonal design schemes is calculated by CFD,and the two schemes with the highest fan efficiency are selected for fur-ther noise simulation based on Actran.Then,the final scheme is selected for sample testing.The results show that,while maintaining the same air volume,using large impeller can reduce the speed from 1 700 rpm to 1 400 rpm,reduce the fan noise by 3.1 dB(A),and decrease the power by 9.1%.
RV air conditioninglarge diameter impellersimulationnoise reduction
万方数据
维普
