A computer programme has been develop to investigate the influence that curvature of the blade exercises on the fluid in radial and mixed flow impellers. Point by point method is used for shaping the blade surface. The results of numerical analysis show that a linear variation of the blade angle with the ordinate in the conformal plane is a satisfactory compromise between flow behaviour and geometrical requirements. Blades having NACA profile sections are compared with other configurations. It was observed that the former produce a remarkable fluctuation of the angle of the absolute velocity at the discharge section.
On the choice of the vane curvature of centrifugal impellers
PAVESI, GIORGIO;ARDIZZON, GUIDO
1992
Abstract
A computer programme has been develop to investigate the influence that curvature of the blade exercises on the fluid in radial and mixed flow impellers. Point by point method is used for shaping the blade surface. The results of numerical analysis show that a linear variation of the blade angle with the ordinate in the conformal plane is a satisfactory compromise between flow behaviour and geometrical requirements. Blades having NACA profile sections are compared with other configurations. It was observed that the former produce a remarkable fluctuation of the angle of the absolute velocity at the discharge section.
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