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Analysis of Transie...
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Johansen, Lars Christian Riis,1987Chalmers tekniska högskola,Chalmers University of Technology
(author)
Analysis of Transient Compressible Gas Jets Using High Speed Schlieren Imaging
- Article/chapterEnglish2013
Publisher, publication year, extent ...
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2013-04-08
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400 Commonwealth Drive, Warrendale, PA, United States :SAE International,2013
Numbers
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LIBRIS-ID:oai:research.chalmers.se:d08ee241-f22c-4085-8850-414888571caf
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https://research.chalmers.se/publication/176265URI
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https://doi.org/10.4271/2013-01-0871DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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Transient compressible gas jets, as encountered in direct injection gas fuel engines, have been examined using schlieren visualization. Helium has been injected into air in a pressure chamber to create the jets examined. The structure of the jets is studied from the mean and coefficient of variation of the penetration length, jet width and jet angle. The quantities are calculated by digital image processing of schlieren images captured with a high-speed camera. Injection pressure and chamber pressure have been varied to determine whether they have an effect on the response variables. Design of experiments methods have been used to develop the scheme employed in performing the experiments. The mean normalized penetration length of the jets is found to scale with injection to chamber pressure ratio and is in agreement with a momentum conserving relation given in the literature. The dispersion of the penetration length has been found to be in agreement with a normal distribution. The Turner model for a jet has been found to be in agreement with the observed jets. The jet has been observed to transition to self-similarity within 20 nozzle diameters. The calculated penetration constant Γ has been observed to vary with the pressure ratio and is smaller than previously reported values. The jet angle approaches a constant value for all cases and has also been found to be in approximate agreement with a normal distribution.
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De Benito Sienes, Eugenio,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)benito
(author)
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Dahlander, Petter,1967Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)dallas
(author)
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Chalmers tekniska högskola
(creator_code:org_t)
Related titles
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In:SAE Technical Papers400 Commonwealth Drive, Warrendale, PA, United States : SAE International20148-71912688-3627
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