The groove at blade tip designed for suppression of tip-leakage vortex may bring the risk of inducing new cavitation

Autor:	Jing-Wei Jiang, Chun-Mei Xie, Liang-Hao Xu, Liang Li, Wei-Xi Huang
Rok vydání:	2022
Předmět:	Fluid Flow and Transfer Processes Mechanics of Materials Mechanical Engineering Computational Mechanics Condensed Matter Physics
Zdroj:	Physics of Fluids. 34:121701
ISSN:	1089-7666 1070-6631
DOI:	10.1063/5.0128892
Popis:	Previous research showed that slotting at the tip section of a rotating machinery blade could suppress the tip-leakage vortex (TLV) by forming a new groove flow, while the possible adverse effects caused by the discontinuous tip section have not fully been studied. In this Letter, unfavorable effects due to an extra cavitation caused by the groove found in the standard incipient cavitation experiments are reported. Then, this anomaly is clarified by using large eddy simulation that the grooves cause step-like flows and induce low-pressure areas behind the groove near the pressure surface. This increased risk of inducing new cavitation deserves special attention when the medium is water.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::55dd8e9d411791b3faed40f0d41c9662 https://doi.org/10.1063/5.0128892 Zobrazit plný text záznamu