Vorticity Based Flow Analysis and Visualization for Pelton Turbine Design Optimization

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Vorticity Based Flow Analysis and Visualization
for Pelton Turbine Design Optimization

• F. Sadlo, R. Peikert, E. Parkinson
• ETH Zurich, VA Tech Hydro, 2004

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Introduction

• Water turbine design optimization
• Visualization of flow simulations
• Based on vorticity 3D swirl of velocity
• Application Pelton turbine

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Pelton Turbine
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Vortex Core Lines,Stream Lines

• Vortex core lines
• Sujudi Haimes?
• Picking tool
• Seed circle orthogonal to flow
• Streamlines

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Stream Tubes

• Circle picking tool
• Forward and backward tubes
• Separation vortex
• Vortex sheet roll-up

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Isosurface ofVorticity Magnitude

• Boundary shear flow image
• Isosurface clipped at 2mm from boundary
• Picking tool
• Initial planar curve orthogonal to flow

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Vorticity Field Lines
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Vorticity Field Lines