摘要
比较前弯和后弯叶轮流道中的流动结构得知,前弯叶轮的叶片数应适当多于后弯叶轮.计算了12个和16个叶片的两个前弯叶轮中的边界层动量厚度,并对该两叶轮进行性能试验,证实了适当增加前弯叶轮的叶片数可以提高叶轮的压力和效率。
A conclusion can be drawn from the comparison made between the flow behaviors in forward-bent and of backward-bent impeller passages,i.e.the number of blades of the former should appropriately be more than that of the latter . It is supported by the calculation of momentum thickness of boundarylayer and performance tests made for two forward-bent impellers-one is of 12blades and the other 16 blades. Results indicated that the impeller of 16 blades is higher in both pressure and efficiency.
关键词
通风机
前弯叶轮
叶片
离心通风机
centrifugal fan, forward-bent impeller, slip factor, friction loss , eddyloss.
