MODELING OF SUPER CAVITATION ON WING USING PARTIAL NONLINEAR MODEL OF BOUNDARY ELEMENT METHODS

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JAFARI JAVAD; PASANDIDEHFARD MAHMOUD; CHANGIZIAN MAZIAR

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:7 Page(s): 12-22

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Title

MODELING OF SUPER CAVITATION ON WING USING PARTIAL NONLINEAR MODEL OF BOUNDARY ELEMENT METHODS

Author(s)

JAFARI JAVAD | PASANDIDEHFARD MAHMOUD | CHANGIZIAN MAZIAR | Issue Writer Certificate

Keywords

SUPER CAVITYQ1

KUTTA CONDITIONQ1

BOUNDARY ELEMENT METHOD (BEM)Q2

WINGQ1

Abstract

In this paper simulation of steady super cavitation phenomenon has been considered by using partial non-linear model of Boundary Element Method (BEM).The grid mesh used is fixed and the strength of dipole and source are constant on each element. With the assumption of a partial non-linear model the cavity condition is applied on the body with the assumption that cavity height is low. Thus there is not any calculation on the cavity surface, but it is restricted to only the panels on the body surface. Cavitation number is known at first and the cavity length is determined in every iteration. When the lengths obtained in two successive iterations are very close to each other it is assumed to be the answer. Based on this method two KUTTA CONDITIONs including Morino condition and Iterative Pressure KUTTA CONDITION (IPKC) are studied to satisfy the wake surface condition. The application is a WING with NACA16006 section. IPKC condition compared to Morino one needs higher computational costs, but on the other hand leads to more accurate results. It has been shown that simulation of the flows with super cavitation over WING leads to a pressure difference at the trailing edge of each strip if Morino’s KUTTA CONDITION is used. While if Iterative Pressure KUTTA CONDITION is used the results are satisfactory. Comparison of the results shows that this method leads to very accurate predictions for the behavior of flows with cavitation, while significantly lower computational cost is required if the simple cavity closure condition is used.

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APA: Copy

JAFARI, JAVAD, PASANDIDEHFARD, MAHMOUD, & CHANGIZIAN, MAZIAR. (2016). MODELING OF SUPER CAVITATION ON WING USING PARTIAL NONLINEAR MODEL OF BOUNDARY ELEMENT METHODS. MODARES MECHANICAL ENGINEERING, 16(7), 12-22. SID. https://sid.ir/paper/178321/en

Vancouver: Copy

JAFARI JAVAD, PASANDIDEHFARD MAHMOUD, CHANGIZIAN MAZIAR. MODELING OF SUPER CAVITATION ON WING USING PARTIAL NONLINEAR MODEL OF BOUNDARY ELEMENT METHODS. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(7):12-22. Available from: https://sid.ir/paper/178321/en

IEEE: Copy

JAVAD JAFARI, MAHMOUD PASANDIDEHFARD, and MAZIAR CHANGIZIAN, “MODELING OF SUPER CAVITATION ON WING USING PARTIAL NONLINEAR MODEL OF BOUNDARY ELEMENT METHODS,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 7, pp. 12–22, 2016, [Online]. Available: https://sid.ir/paper/178321/en

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