Schlieren
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This document provides an overview of Schlieren flow visualization technique. It discusses that Schlieren photography uses the refractive index variations in a flow field to visualize density gradients. The conventional Schlieren system uses a light source, knife edge, and camera to capture displaced images caused by differences in light refraction through the test section. The document also briefly compares Schlieren to other flow visualization methods like shadowgraph, and provides examples of Schlieren used to photograph aircraft shockwaves in flight testing.
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Gas chromatography . ppt
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Thermal analysis
Thermal analysis, Prof. Dr. Basavaraj K. Nanjwade, KLE University College of Pharmacy, Belgavi/Belgaum, Karnataka, India.
Light.ppt
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Schlieren
- 1. A Review on Schlieren Flow Visualization Technique Maryam Kordbacheh Undergraduate Student Supervisor: Dr. Esfehanian 8/4/1389 Faculty of Mechanical Engineering University of Tehran
- 5. Comparison to Other Methods
- 7. Flow Visualization Methods Compressible flows Smoke visualization Particle Shadowgraphs and Schlieren Incompressible flows Dye Shadowgraphs and Schlieren Particles Bubbles Fluorescence, phosphorescence Drop falling on liquid surface
- 8. Incompressible Flows Insects walking on water Normal laminar flow chain dye visualization
- 9. Compressible Flows Shadowgraph Schlieren flow visualization laminar smoke jet
- 12. the refractive index : n = c0/c
- 13. For air - index has a linear relation with density: The higher the density, the slower the light moves
- 14. So, any compressible flow will cause the wave front of light to “turn”.
- 16. Density gradient causes displacement of source image Displaced Image Image
- 19. The extra dimension of color helps to have vector directions in addition to scalars
- 21. 2nd derivative of density
- 22. Simplest method
- 23. Lower contrast
- 24. Schlieren
- 25. 1st derivative of density
- 26. Small increase in complexity
- 28. Interferometer
- 29. 2D quantitative measurement of n, T, Density
- 30. Sum of path differences < λ/10th
- 32. Schlieren Technique in Application Schlieren for Flight Test
- 33. Thanks for your Attention