| 摘要 |
<p>A centrifugal or mixed flow pump has been developed, which has a design of diffuser vanes which is neither the conventional design forming a fluid passage between the vanes nor comprising a small number of airfoil shaped vanes. The centrifugal or mixed flow type turbomachine comprises a pressurizing section having a centrifugal or mixed flow type impeller housed in a casing, and a diffuser section having a plurality of and not more than ten diffuser vanes disposed in an outer circumferential area of the pressurizing section. Each the diffuser vane is formed so that a vane angle defined as an angle between a camber line of the diffuser vane and a circumferential direction at any point along the diffuser vane has a smaller rate of change with reference to a non-dimensional meridional length in a fore part region of the diffuser section than in an after part section of the diffuser section.</p> |
