Rocket Nozzle Cold-Gas Flow Velocity Measurements Using Laser-Induced Gratings
Hemmerling, B. and Neracher, M. and Kozlov, D. and Kwan, W. and Klimenko, D. and Clauss, W. and Oschwald, M. (2002) Rocket Nozzle Cold-Gas Flow Velocity Measurements Using Laser-Induced Gratings. Journal of Raman Spectroscopy, 33, pp. 912-918.
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The heterodyne detection laser-induced electrostrictive gratings technique was employed for characterization of a flow velocities field in the plume of a rocket nozzle. The intention of the work was to validate CFD calculations, that predict the appearance of a recirculation zone inside the flow at a certain ratio of nozzle and ambient pressures. This zone co-exists with the side loads to the nozzle wall that were observed experimentally as transient forces during the start-up or the shut-down of the thrust chamber. Measurements were performed in cold-gas flows from a subscale thrust-optimized, parabolic nozzle. Nitrogen at stagnation pressures up to 40 bar was supplied to the nozzle. The experimental results clearly proved the existence of a recirculation zone in the flow field, in a reasonable agreement with the predictions of CFD calculations.
|Title:||Rocket Nozzle Cold-Gas Flow Velocity Measurements Using Laser-Induced Gratings|
|Journal or Publication Title:||Journal of Raman Spectroscopy|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 912-918|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W RP - Raumtransport|
|DLR - Research area:||Space|
|DLR - Program:||W RP - Raumtransport|
|DLR - Research theme (Project):||E -- no assignement|
|Institutes and Institutions:||Institute of Space Propulsion|
|Deposited By:||Monika Lohmiller|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 14:00|
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