Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5474390 | Ocean Engineering | 2017 | 9 Pages |
Abstract
The objective of this paper is to address the simulation of supercavitating flows around a slender body projectile at the sub-, trans- and supersonic speeds with the water compressibility effects considered. Based on the slender body theory (SBT) and the matched asymptotic expansion method (MAEM), the integro-differential equations for the cases of Ma<1 and Ma>1 are derived and solved. The results show that there is a good agreement of the supercavity shape for both the cases of Ma<1 and Ma>1 between the numerical simulation and the experimental results. The influence of Mach number on the supercavity length L, maximum radius R, slenderness λ, the corresponding growth rate of the supercavity length LË, the growth rate of the maximum supercavity radius RË, and the position of the supercavity maximum section (PSMS) are discussed. It can be found that LË is much bigger than RË, due to the large λ. It also concludes that the front part of the supercavity is thicker than the rear part, and the PSMS moves forward further at supersonic speed. Finally, the reason for the supercavity shape transition around Ma = 1 is illustrated and it may be the cause of the extension of perturbation zones at transonic speed.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Ocean Engineering
Authors
Changchang Wang, Guoyu Wang, Mindi Zhang, Biao Huang, Deming Gao,