| Autor: |
M. Carl, M. Zarzalis, C. Hassa, B. Lehmann, T: Ripplinger, R. Schodl, P. Voigt |
| Rok vydání: |
2002 |
| Předmět: |
|
| Zdroj: |
38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. |
| DOI: |
10.2514/6.2002-3709 |
| Popis: |
A model combustor with wide optical access was built for the investigation of isothermal mixing. The planar Quantitative Light Scattering Technique (QLS) was used for the measurement of the concentration of fluid injected through the dilution jets into the combustor liner. The velocity distribution in the combustor was measured with a 2-D Laser Doppler Anemometer. The derivation of the Mie scattering as a quantitative measure for concentration distributions is given, the image corrections methods are described and the experimental setup used for the investigation is discussed together with an error estimation. The errors of the measured mean concentrations can be limited to 5%. The combination of the measurement of the velocity and the concentration of jet fluid as a passive scalar qualified the experiment as suitable test case for the verification of the capability of various CFD codes to model turbulent mixing in the presence of swirling recirculation. The results show a strong coupling of the jet mixing to the structure of the primary zone flow. The variation of the jet to mainstream momentum ratio with the position of the jet relative to the burner nozzles and the pressure distribution created by the recirculation influences the jet penetration and backmixing of jet fluid in the primary zone notably. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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