Accession Number:

ADA588597

Title:

Advancement and Application of Multi-Phase CFD Modeling to High Speed Supercavitating Flows

Descriptive Note:

Final rept. Oct 2008-Dec 2013

Corporate Author:

PENNSYLVANIA STATE UNIV STATE COLLEGE APPLIED RESEARCH LAB

Personal Author(s):

Report Date:

2013-08-13

Pagination or Media Count:

30.0

Abstract:

In this work, we present insight on the internal gaseous flow of artificially ventilated supercavities. Using multiphase computational fluid dynamics, the major mechanism of gas leakage from a ventilated supercavity is identified as occurring though gaseous shear layers forming at the gas-water interface. These observations corroborate previous theory developed for toroidal cavities, and display evidence that shear-layer mechanisms remain important for twin-vortex cavities and cavities interacting with bodies. Additionally, shear mechanisms appear to influence cavity hysteresis behavior. These observations are used to guide improved supercavitating-vehicle analyses including numerical predictions, experiments, and modeling.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE