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30th International Symposium on Shock Waves 1 pp 83–87Cite as

Flow Visualization in Out-of-Round Rocket Nozzles

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Abstract

Flow fluctuations in or around rocket nozzles can lead to a deformation of their structure. In case of separated nozzle flow, an inward bended nozzle wall shifts the flow separation position downstream, increasing the bending force lever arm. This flow-structure interaction is a self-reinforcing effect, which can potentially lead to heavy structural damages. These disturbances can be produced either by combustion instabilities or ambient pressure fluctuations. Under certain conditions, they may excite the bell nozzle eigenfrequency. As a result, the structure responds and the nozzle ovalizes. For this reason, the investigation of flow-structure interaction in ovalized nozzles under separated flow condition is difficult to realize [1–4].

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References

  1. Tuovila, J., Land, S.: Experimental study of aeroelastic instability of overexpanded rocket nozzle extensions. NASA-TN-D-4471, Langley Research Center (1968)

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  2. Brown, M., Ruf, J., Reed, D., D’Agostino, M., Keanini, R.: Characterization of side load phenomena using measurement of fluid/structure interaction. In: AIAA 2002–3999, 38th AIAA Joint Propulsion Conference, Indianapolis, IN (2002)

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  3. Moreaux, N., Girard, S.: Experimental assessment of aeroelastic coupling in a rocket engine nozzle. ONERA TP 2003-80, IFASD, Amsterdam, Netherlands, (2003)

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  4. Xia, Y., Schwane, R.: Investigation of the aerodynamic influence of a non-axisymmetric flow on side load generation in over-expanded rocket nozzles, DGLR-JT2004-274 (2004)

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  5. Génin, C., Stark, R., Jack, S.: Flow separation in out-of-round nozzles, a numerical and experimental study. In: Progress in Flight Physics, vol. 7. Springer, Berlin (2015)

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Acknowledgments

This work was co-funded by the special research field SFB-TRR40 of the Deutsche Forschungsgemeinschaft (DFG).

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Authors and Affiliations

  1. Institute of Space Propulsion, German Aerospace Center (DLR), Lampoldshausen, Germany

    C. Génin & R. Stark

  2. Institute of Aerodynamics and Flow Technology, German Aerospace Center (DLR), Braunschweig, Germany

    S. Jack

Authors
  1. C. Génin
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  2. S. Jack
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  3. R. Stark
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Corresponding author

Correspondence to C. Génin .

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Editors and Affiliations

  1. Department of Mechanical Engineering, Ben Gurion University of the Negev, Beer Sheva, Israel

    Gabi Ben-Dor

  2. Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel

    Oren Sadot

  3. Department of Mechanical Engineering, Ben Gurion University of the Negev, Beer Sheva, Israel

    Ozer Igra

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© 2017 Springer International Publishing AG

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Génin, C., Jack, S., Stark, R. (2017). Flow Visualization in Out-of-Round Rocket Nozzles. In: Ben-Dor, G., Sadot, O., Igra, O. (eds) 30th International Symposium on Shock Waves 1. Springer, Cham. https://doi.org/10.1007/978-3-319-46213-4_13

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  • DOI: https://doi.org/10.1007/978-3-319-46213-4_13

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-46211-0

  • Online ISBN: 978-3-319-46213-4

  • eBook Packages: EngineeringEngineering (R0)

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