Investigation into cavitation in a prototype pipeline caused by water hammer
Abstract
In long pump discharge lines cavitation will occur as a consequence of pump failure. Column separation and two-phase flow will take place. Two mathematical models developed by the Delft University of Technology and the Delft Hydraulics Laboratory are reviewed briefly. The results of experiments in a horizontal circuit with high points are shown. A third model was developed in which the cavities were concentrated in grid points. This model showed good agreement with all laboratory tests. The technique used is described and verified by means of measurements in a prototype pipeline with a length of 27,900 m and an inside diameter of 1.80 m. At high points cavities developed to volumes of about 15 cu m and a duration of up to 80 sec was measured. The results of measurements and calculations to the prototype pipeline are shown, special attention being given to column separation at high points.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- November 1976
- Bibcode:
- 1976STIN...7828389P
- Keywords:
-
- Cavitation Flow;
- Mathematical Models;
- Pipelines;
- Water Hammer;
- Bubbles;
- Hydraulic Equipment;
- Prototypes;
- Separated Flow;
- Fluid Mechanics and Heat Transfer