The Research Of Axisymmetric Body Cavitaty Shapes Based On Potential Flow Theory

First Matched Asymptotic Expansion Method(MAEM) based on leptoso-matic body theory of potential flow theory are discussed in this paper. From Equation of Laplace calculating formulas for leptosomatic body are educed, the results and some experienced formulas are compared.Based on Boundary Element Method(BEM) of potential flow assumption, pressure recovery termination model and Re-Entrant Jet Model are adopted to analyse non-linearity of axisymmetric body. Re-Entrant Jet Model are used to axisymmetric body for the first time, which make cavity closure model of tail hydrokinetics approach the fact and improve the astringency and applicability of Re-Entrant Jet Model. For validating the veracity of the results, the results compares with that ones by FLUENT which takes turbulent and cavitation modes into account. Finally under different geometry parameters of axisymmetric body the changes of cavity shapes are discussed, some remarkable rules are found, which will provide reference for design of underwater vehicles.Proposed Re-Entrant Jet Model and pressure recovery termination model which needs to improve in the consideration of coherency and the astringency.