Yang, Joseph and Kubota, Toshi and Zukoski, Edward E. (1992) An analytical and computational investigation of shock-induced vortical flows. AIAA Papers, AIAA-92-0316 . American Institute of Aeronautics and Astronautics . http://resolver.caltech.edu/CaltechAUTHORS:20101130-135036760
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Interaction of a shock wave with a jet of light gas surrounded by an ambient heavy gas generates vorticity around the perimeter of the jet. This rolls the jet into a pair of counterrotating, finite-core size vortices. The canonical problem is the two-dimensional, unsteady interaction in a finite channel. The dynamics of the vortex pair are controlled by the incident shock strength, the light/heavy gas density ratio, and the channel spacing. Analytical expressions are derived which describe the strength and motion of the vortex pair as a function of these parameters. Numerical simulations shQw good agreement with these models. Various perturbations on the single jet flow are investigated with the goal of destabilizing the vortex pair and further enhancing the mixing. Single jet shape perturbations are relatively ineffective. However, an array of jets can dramatically increase the mixing. Another effective method is to form a reflected shock. Finally, an analogy to the corresponding three-dimensional, steady flows is demonstrated both qualitatively and quantitatively. This allows an understanding of the dynamics and mixing of the two imensional, unsteady flows to be directly applied to three-dimensional, steady flows typical of SCRAMJET designs.
|Item Type:||Report or Paper (Report)|
|Additional Information:||© 1991 by Joseph Yang. Published by the American Institute of Aeronautics and Astronautics, Inc. with permission. This research was supported by the Air Force Office of Scientific Research, under the supervision of Dr. Julian Tishkoff, through contract number F49620-86-C-0113 and grant number AFOSR-90-0188. It was also supported by the National Science Foundation through a Cray supercomputer grant at the San Diego Supercomputer Center. The first author was supported by the Office of Naval Research through an ONR Graduate Fellowship. The authors would like to thank Dr. Elaine S. Oran, of the Laboratory for Computational Physics at the Naval Research Laboratory, for providing the algorithm used in the numerical simulations.|
|Group:||Guggenheim Jet Propulsion Center|
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|Official Citation:||An analytical and computational investigation of shock-induced vortical flows YANG, JOSEPH, California Institute of Technology, Pasadena; KUBOTA, TOSHI, California Institute of Technology, Pasadena; ZUKOSKI, EDWARD E., California Institute of Technology, Pasadena AIAA-1992-316 Aerospace Sciences Meeting and Exhibit, 30th, Reno, NV, Jan 6-9, 1992. 14 p.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||04 Dec 2010 00:48|
|Last Modified:||26 Dec 2012 12:41|
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