Accession Number:

ADA426426

Title:

Advancement and Application of Multiphase CFD Modeling to High Speed Supercavitating Flows

Descriptive Note:

Final rept. 1 Jan 2001-30 Dec 2003

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB

Personal Author(s):

Report Date:

2004-08-20

Pagination or Media Count:

34.0

Abstract:

Recent progress in the development and application of homogenous multiphase CFD methods for large-scale gas cavities in liquid flows are presented. The focus of the presentation is on work in n-species transport approaches applied to developed and super-cavitation. Numerical formulation, physical modeling, and applications are included. Numerical issues to be discussed include preconditioning in the context of incompressible through supersonic Mach numbers, arbitrary numbers of species, high density ratios, and large gas volumemass fractions computational grid requirements dual-time formulation and general large-scale high-performance computing. Physical modeling issues to be discussed include homogeneous mixture compressibility mass-transfer modeling condensable and non-condensable gas species turbulence modeling and 6-degree-of-freedom 6DOF flowfieldrigid-body interaction. The applications to be presented range from naturally cavitating modeled flow on simple configurations ogives, nozzles, airfoilswedges to more industrially relevant, complex-geometry applications including turbomachinery cavitation breakdown, and super-cavitation underwater rockets, hypervelocity darts, condensable and non-condensable cavities, gas-onoff transients, twin-vortex regime. Recent applications including Detached Eddy Simulation DES of natural cavities, and 6DOF analysis of a propelled notional super-cavitating vehicle are presented.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE