Initial flow quality of the mach 4 quiet ludwieg tube

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


The Mach 4 Quiet Ludwieg Tube (QLT4) has been successfully installed as the first operational tunnel of the Boundary Layer Stability and Transition (BLST) experimental facility at the University of Arizona. Results from an initial flow-quality and performance assessment campaign are reported. QLT4 produces Mach 4 flow that is stable across a range of operating conditions to within 1.5% of the nominal free-stream value. The tunnel is capable of producing quiet flow up to a total pressure of pt1 = 95.4 kPa (13.8 psia) and a unit Reynolds number of 4.27 × 106 m−1 near the downstream end of the quiet core as reported by Schneider and Haven [1]. Maximum quiet pressure is observed to decrease as the probe approaches the tunnel walls and as the probe moves downstream.

Original languageEnglish (US)
Title of host publicationAIAA Aviation 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages8
ISBN (Print)9781624105890
StatePublished - 2019
EventAIAA Aviation 2019 Forum - Dallas, United States
Duration: Jun 17 2019Jun 21 2019

Publication series

NameAIAA Aviation 2019 Forum


ConferenceAIAA Aviation 2019 Forum
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Aerospace Engineering


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