Loading...
Please wait, while we are loading the content...
Similar Documents
Origins of hydrodynamic forces on centrifugal pump impellers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Adkins, Douglas R. Brennen, Christopher E. |
| Copyright Year | 1987 |
| Description | Hydrodynamic interactions that occur between a centrifugal pump impeller and volute are experimentally and theoretically investigated. The theoretical analysis considers the inability of the blades to perfectly guide the flow through the impeller, and also includes a quasi-one dimensional treatment of the flow in the volute. The disturbance at the impeller discharge and the resulting forces are determined by the theoretical model. The model is then extended to obtain the hydrodynamic force perturbations that are caused by the impeller whirling eccentrically in the volute. Under many operating conditions, these force perturbations were found to be destablizing. Comparisons are made between the theoretical model and the experimental measurements of pressure distributions and radial forces on the impeller. The theoretical model yields fairly accurate predictions of the radial forces caused by the flow through the impeller. However, it was found that the pressure acting on the front shroud of the impeller has a substantial effect on the destablizing hydrodynamic forces. |
| File Size | 972483 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870012791 |
| Archival Resource Key | ark:/13960/t8nd0v91w |
| Language | English |
| Publisher Date | 1987-01-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Stability Turbine Blades Impellers Fluid Flow Pressure Distribution Centrifugal Pumps Radial Flow Hydrodynamic Coefficients Perturbation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
