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Flow quality experiment in a tandem nozzle wind tunnel at Mach 3

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Abstract

In this study, the disturbance characterization and flow quality improvement of a newly designed Tandem Nozzle Mach 3 Wind Tunnel are presented. Firstly, a combined modal analysis is conducted to characterize the freestream disturbances with initial set-up of the settling chamber by using a Pitot probe and a hot-wire anemometry. Then, disturbance reduction in the supersonic wind tunnel is investigated by inserting various damping materials into the settling chamber, while a Pitot probe instrumented with Kulite sensor is employed to monitor the variation of the Pitot pressure fluctuation in the test section. Eventually, an optimized configuration of the settling chamber is determined by a combination of certain damping materials. Afterward, the freestream disturbances are re-characterized with the optimized set-up of the settling chamber, and the disturbance level is found to be significantly reduced. Through this study, valuable experience has been acquired for the disturbance reduction in tandem nozzle type supersonic wind tunnel for the first time, which enhances the feasibility of extending the operation range of conventional hypersonic Ludwieg tubes.

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Authors and Affiliations

  1. Institute of Fluid Mechanics, TU-Braunschweig, Braunschweig, Germany

    Jie Wu, Pradip Zamre & Rolf Radespiel

Authors
  1. Jie Wu
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  2. Pradip Zamre
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  3. Rolf Radespiel
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Correspondence to Jie Wu.

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Wu, J., Zamre, P. & Radespiel, R. Flow quality experiment in a tandem nozzle wind tunnel at Mach 3. Exp Fluids 56, 20 (2015). https://doi.org/10.1007/s00348-014-1887-1

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  • DOI: https://doi.org/10.1007/s00348-014-1887-1

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