Development of a Quantitative Schlieren Technique: BOS
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Development of a Quantitative Schlieren Technique: BOS
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| Creator |
Venkatakrishnan, L
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| Subject |
Aerodynamics
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| Description |
A new technique making use of the recent advances in CCD technology and fast processors to obtain quantitative Schlieren of density fields in high-speed flows
requiring only a digital camera was proposed by Meier (1999) called Background Oriented Schlieren. This report details the implementation of this technique to obtain density and its validation on an axisymmetric supersonic flow over a 150 cone. Comparisons with cone tables show excellent agreement. Measurements were also made on an axisymmetric converging nozzle (Mj=1) operating at moderately and highly expanded values of nozzle pressure ratios. The validation of the Filtered Back Projection Tomography (FBPT) used in this technique was done by extracting the central plane of a 4-jet configuration. Density fields for two nozzle expansion ratios are presented. The study shows that meaningful quantitative data can be extracted using minimal hardware with this
technology.
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| Publisher |
National Aerospace Laboratories
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| Date |
2004-03
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| Type |
Proj.Doc/Technical Report
NonPeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/9928/1/PD_EA_0404.pdf
Venkatakrishnan, L (2004) Development of a Quantitative Schlieren Technique: BOS. Project Report. National Aerospace Laboratories, Bangalore. |
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| Relation |
http://nal-ir.nal.res.in/9928/
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