(9/19/07) Juliett Davitian has won the 2007 AIAA Outstanding Aerospace Engineering M.S. Student Award.
Congratulations!

(06/07) Juliett Davitian has won the AE outstanding M.S. recipient award and Hann Mao has won the AE outstanding B.S. recipient award for 2007. Congratulations!

(06/06) Leo Alves has won the MAE outstanding PhD recipient award and Marcus George has won the AE outstanding MS recipient award for 2006. Congratulations!

(05/06) Ann Karagozian has completed chairing two studies for the Air Force.

(09/05) Juliett Davitian has won a three year NASA Graduate Student Research Program Fellowship, commencing in the Fall of 2005.

(5/05) Ann Karagozian has been appointed the Vice Chair of the Air Force Scientific Advisory Board.

(1/05) Srinivasan Dattarajan MS '02 , PhD '04 won the 2004 Best Student Presentation award from the AIAA Microgravity Technical Committee.

(5/12/04) Sevan Megerian Wins First Place at AIAA Student Conference, 2004.

(8/03) Lydia Treviño featured in UCLA Engineer—

(6/03) Robert Lobbia has received a special scholarship award from Aviation Week & Space Technology—the Next Century of Flight (NCF) award.

Click here for the latest group publications.

Researchers: Prof. Ann Karagozian, Prof. Owen Smith

Round Jets Injected into Compressible Crossflows
Professors Ann R. Karagozian and Owen I. Smith; MAE Department

This experimental and theoretical study (completed) is directed towards a better understanding of the penetration and mixing of transverse jet injected into crossflows. Analytically oriented models have been developed emphasizing the the dynamics of the vortical structures observed to dominate the cross-section of transverse jets injected into a crossflow of the same phase. Model results are compared with experimental jet trajectories. Recent experimental measurements are concentrated in the transonic regime, where no previous measurements exist.

An iodine seeded nitrogen jet emanates from a flight test fixture attached beneath a NASA F104G aircraft. The jet is oriented normal to M=0.6-1.8 crossflows formed by the freestream surrounding the flight test fixture. The resulting trajectories are visualized in flight by planar laser-induced fluorescence of iodine. Measurements involving injection into uniform crossflows and injection behind rearward facing steps have been completed.

The principal applications of this work is in optimizing the mixing of fuel jets in supersonic combustions. The planar laser-induced flow visualization apparatus developed for this project is now being applied to mixing studies.

Sponsors: NASA Dryden Research Center

Selected Publications:

1. Transverse Gas Jet Injection Behind a Rearward-Facing Step , A.R. Karagozian, K.C. Wang, A.T. Le, and O.I. Smith, J. Propulsion and Power, 12, 1129-1136, 1996.


2. In-Flight Imaging of Gas Jets Injected into Subsonic and Supersonic Crossflows , C. Wang, O.I. Smith and A.R. Karagozian, AIAA Journal, 33, 2259-2263, 1995.



3. Gaseous Jet in Supersonic Crossflow, S.D. Heister and A.R. Karagozian, AIAA J, 28, 819-827, 1990.



4. Vortex Modeling of Gaseous Jets in a Compressible Crossflow, S.D. Heister, and A.R. Karagozian, J Propul and Power, 6, 85-92, 1990.