Publication Type:

Conference Paper

Source:

IOP Conference Series: Materials Science and Engineering, Institute of Physics Publishing, Volume 225, Number 1 (2017)

URL:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85030320844&doi=10.1088%2f1757-899X%2f225%2f1%2f012041&partnerID=40&md5=75c3acb7f2c9b4c0c2add7a7c74f78c3

Keywords:

Behavioural changes, Cavitating flow, Cavitation, Cavitation bubble, Cavitation number, Computational fluid dynamics, Computational fluid dynamics analysis, Drag, Drag coefficient, Energy utilization, Inlet flow, Skin friction, Skin-friction drag, Submerged object, Supercavitation, Turbulence models

Abstract:

A super-cavitating object is a high speed submerged object that is designed to initiate a cavitation bubble at the nose which extends past the aft end of the object, substantially reducing the skin friction drag that would be present if the sides of the object were in contact with the liquid in which the object is submerged. By reducing the drag force the thermal energy consumption to move faster can also be minimised. The super-cavitation behavioural changes with respect to Cavitators of various geometries have been studied by varying the inlet velocity. Two-dimensional computational fluid dynamics analysis has been carried out by applying k-ϵ turbulence model. The variation of drag coefficient, cavity length with respect to cavitation number and inlet velocity are analyzed. Results showed conical Cavitator with wedge angle of 30° has lesser drag coefficient and cavity length when compared to conical Cavitators with wedge angles 45° and 60°, spherical, disc and stepped disc Cavitators. Conical cavitator 60° and disc cavitator have the maximum cavity length but with higher drag coefficient. Also there is significant variation of supercavitation effect observed between inlet velocities of 32 m/s to 40 m/s. © Published under licence by IOP Publishing Ltd.

Notes:

cited By 0; Conference of 1st International Conference on Materials, Alloys and Experimental Mechanics, ICMAEM 2017 ; Conference Date: 3 July 2017 Through 4 July 2017; Conference Code:130336

Cite this Research Publication

S. Sooraj, Chandrasekharan, V., Robson, R. S., and Prakash, S. B., “Super-Cavitating Flow Around Two-Dimensional Conical, Spherical, Disc and Stepped Disc Cavitators”, in IOP Conference Series: Materials Science and Engineering, 2017, vol. 225.

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