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) : Lindau, Jules W ; Kinzel, Michael P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a588597.pdf


Report Date : 13 Aug 2013


Pagination or Media Count : 30


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.


Descriptors :   *COMPUTATIONAL FLUID DYNAMICS , CAVITIES , GAS FLOW , MULTIPHASE FLOW


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE