PREROTATION FLOW ANGULAR FREQUENCY ANALYSES |
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| A. Predin, I. Biluš |
- Abstract:
- In this paper the results of the experimental and theoretical analyses of angular frequency of the prerotating flow in the entrance pipe of turbomachines, at different operating regimes are given. The prerotation flow swirl appears far before the impeller blades entrance edge and it is the result of the developed circulation flows in the individual impeller channels that also has an affect on the impeller efficiency.
The mathematical model proposal for the angular flow frequency calculation in the entrance pipes of the model turbomachine (pump-turbine model) is given. The model is based on the determination of the relative circulation flow in the impeller channels that appears as a consequence of the effect of the rotated impeller channels.
The calculation results are compared by experimental data of measured prerotation flow angular frequency by simplified anemometer with six straight blades in the axial pipe direction. The anemometer is placed in the entrance pipe at distance of three-pipe diameters distance before the impeller entrance. - Keywords:
- radial turbo-machine, prerotation flow measuring, anemometer with straight blades
- Download:
- IMEKO-WC-2000-TC15-P429.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000