Investigation of the Unsteady Pressure Distribution on the Blades of an Axial Flow Fan.
Abstract
The results are presented of a program to investigate the distribution of unsteady pressure on the blades of a stator blade row which operated in the wakes of an upstream rotor. These unsteady pressure distributions were measured using a blade instrumented with a series of miniature pressure transducers which was developed in this program. The influence of several geometrical and flow parameters - rotor/stator spacing, stator solidity and stator incidence angle - were studied to determine the unsteady response of the stator to these parameters. These studies indicate a major influence on the stator unsteady response is due to the stator solidity. At high solidities the blade-to-blade interference has a larger contribution. While the range of rotor/stator spacings investigated had a minor influence, the effect of stator incidence angle is also significant. The data indicate the existence of an optimum positive incidence which minimizes the unsteady response. Further studies are recommended to determine the characteristics of the propagation of the wakes over the stators and behavior of the surface flow during this interaction. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 14, 1978
- Accession Number
- ADA060892
Entities
People
- G. F. Franke
- R. E. Henderson
Organizations
- Pennsylvania State University