Probing into Physics of Ventilation Demand for Supercavitating Underwater Vehicles
11 Pages Posted: 19 May 2018 Last revised: 22 May 2018
Date Written: September 14, 2016
Ventilated supercavitation is a promising approach to achieve significant reduction of drag for high speed underwater transportation. The ventilation demand required for the formation and sustenance of the supercavity under different flow conditions is one of the key questions in the design of underwater vehicles based on ventilated supercavitation, which can be strongly affected by physical phenomena related to liquid gas interactions including, particularly, the closure mechanism of a supercavity. Despite extensive research on ventilated supercavitation, there is still no general consensus on the ventilation demand and the criteria governing closure mechanisms. This paper summarizes a series of our recent studies on ventilated supercavitation, focusing on providing physical insights into the closure mechanism of a supercavity and its connection with the ventilation requirement for the formation and sustenance of supercavitation.
Keywords: ventilated supercavitation, closure mechanism, supercavity formation
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