Relationship between Visual Cavitation Inception and 3% Drop in Head in Centrifugal Pumps. | ||||
| MEJ- Mansoura Engineering Journal | ||||
| Article 5, Volume 35, Issue 2, June 2010, Page 22-38 PDF (1.67 MB) | ||||
| Document Type: Research Studies | ||||
| DOI: 10.21608/bfemu.2020.124639 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. Hosien* 1; S. M. Selim2 | ||||
| 1Mechanical Power Engineering Department ., Faculty of Engineering | ||||
| 2Minoufiya University, Shebin El -Kom, Egypt | ||||
| Abstract | ||||
| Pumps were designed and manufactured to operate far from the cavitation condition. Pump designer has defined the cavitation inception point as the point where the head drops by 3 %. This definition is incorrect, because the first appearance of vapour bubbles was observed earlier than 3% drop in the head. Therefore using 3 % drop in head, as indication parameter for cavitation inception has always resulted in damage in pumps during operation. This paper describes visual studies conducted to determine the variation of net positive suction head with flow rate, rotational speed and water temperature. A special correlation between the visual net positive suction head and net positive suction head corresponding to 3 % drop in head was predicted at various operating conditions. | ||||
| Keywords | ||||
| Cavitation inception; Net Psitive Suction Head; Visualization | ||||
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