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An Experimental and Numerical Analysis of Flow in a ShockWave Power Generator ™

An Experimental and Numerical Analysis of Flow in a ShockWave Power Generator ™. Nicholas Doherty Dr. T. J. Scanlon Dr. M. T. Stickland University of Strathclyde. Introduction to SPG ™. Invented by James Griggs, patented 1993 Attempts to harness the energy release from cavitation

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An Experimental and Numerical Analysis of Flow in a ShockWave Power Generator ™

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  1. An Experimental and Numerical Analysis of Flow in a ShockWave Power Generator™ Nicholas Doherty Dr. T. J. Scanlon Dr. M. T. Stickland University of Strathclyde

  2. Introduction to SPG™ • Invented by James Griggs, patented 1993 • Attempts to harness the energy release from cavitation • Flow mechanism present is not yet understood

  3. Reduced Scale Clear Acrylic Model • Model made entirely of clear acrylic • Large cubic/cylindrical holes to assist visualisation • All other important dimensions remain to scale

  4. Image 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

  5. Experimental Set-Up

  6. Experimental Equipment

  7. Numerical 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

  8. PIV Results • Tests taken at 1,000 rpm • Evidence of vortex formation • Separation from inside wall and area of recirculation

  9. CFD Results • Reasonable correlation with PIV results • Vortex formation in hole • Separation from inside wall and recirculation area

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