Density measurements in an axisymmetric underexpanded jet by background-oriented schlieren technique

Venkatakrishnan, L (2005) Density measurements in an axisymmetric underexpanded jet by background-oriented schlieren technique. AIAA Journal, 43 (7). pp. 1574-1579. ISSN 0001-1452

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Abstract

The background-oriented schlieren (BOS) technique has been applied to obtain the mean density field of a complex underexpanded jet flow. The measurements were made on an axisymmetric sonic jet operating at ideally expanded and highly underexpanded values of nozzle pressure ratios. The methodology involved two steps: validation of the filtered backprojection tomography used here, by making measurements of a four-jet configuration followed by density measurements on axisymmetric sonic jets. Pitot measurements made on an ideally expanded sonic jet were utilized for validation of BOS. The presented density fields show that meaningful quantitative data can be extracted by using minimal hardware with this technology.

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to AIAA
Uncontrolled Keywords:	Schlieren photography;Aeroacoustics;Density measurement; Nozzles;Flow measurement;Jet flow;Hardware;Tomography; Pressure ratio
Subjects:	ENGINEERING > Fluid Mechanics and Thermodynamics
Division/Department:	Experimental Aerodynamics Division
Depositing User:	Ms Indrani V
Date Deposited:	13 Dec 2005
Last Modified:	24 May 2010 09:39
URI:	http://nal-ir.nal.res.in/id/eprint/892

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