| 摘要 |
The vanes of a radial turbine have pressure surfaces which are convex when viewed in a plane normal to the axis of rotation of the radial flow rotor and suction surfaces which are concave when viewed in the same plane. The curvature acts to promote favorable radial surface pressure gradients to assist the control of boundary layer migration in the intervane passages and also increase the structural integrity of the vane members. The otherwise flexible extremities of the vane members are stiffened by introducing the curvature, as the natural resonant vibration frequencies of the vanes are changed. The invention is also applicable to the vane members of a radial or mixed flow impeller in gas or other fluid applications.
|
