An Experimental and Numerical Analysis of Flow in a ShockWave Power Generator ™
description
Transcript of An Experimental and Numerical Analysis of Flow in a ShockWave Power Generator ™
An Experimental and Numerical An Experimental and Numerical Analysis of Flow in a ShockWave Analysis of Flow in a ShockWave
Power GeneratorPower Generator™™
Nicholas Doherty
Dr. T. J. Scanlon
Dr. M. T. Stickland
University of Strathclyde
Introduction to SPGIntroduction to SPG™™
Invented by James Griggs, patented 1993
Attempts to harness the energy release from cavitation
Flow mechanism present is not yet understood
Reduced Scale Clear Acrylic Reduced Scale Clear Acrylic ModelModel
Model made entirely of clear acrylic
Large cubic/cylindrical holes to assist visualisation
All other important dimensions remain to scale
Image De-rotationImage De-rotation
Image de-rotation allows a stationary view of a rotating component
De-rotator mirrors rotate at half the speed of the rotating object
Reveal relative flow hidden by dominant primary flow field
Experimental Set-UpExperimental Set-Up
Experimental EquipmentExperimental Equipment
Numerical AnalysisNumerical Analysis
FLUENT 5 CFD software Moving Reference Frame method Standard form of k- model SIMPLE algorithm for pressure-velocity
coupling Second order upwinding for convection
terms for momentum Steady State and Transient solutions solved
PIV ResultsPIV Results
Tests taken at 1,000 rpm
Evidence of vortex formation
Separation from inside wall and area of recirculation
CFD ResultsCFD Results
Reasonable correlation with PIV results
Vortex formation in hole
Separation from inside wall and recirculation area