Calibration and performance characterizationof a Mach 5 Ludwieg tube

Kyle P. Bearden, Victor E. Padilla, Lutz Taubert, Stuart A. Craig

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Calibration, commissioning, and design features of a new Mach 5 Ludwieg Tube wind tunnel at the University of Arizona are discussed. Mach number uniformity and free-stream noise levels are measured using a Pitot rake at a range of unit Reynolds numbers and at multiple spanwise and streamwise positions. The wind tunnel is shown to have a free-stream Mach number of 4.82 with maximum variance less than 0.8% (and less than 0.5% at most streamwise positions). The average free-stream acoustic noise level in the core (based on Pitot pressure) is shown to be less than 1.2% at an intermediate Reynolds number with some regions dropping locally below 1.0%. The core flow region is measured to be 282.4 mm (11.1 in.) in diameter at the nozzle exit.

Original languageEnglish (US)
Article number085104
JournalReview of Scientific Instruments
Volume93
Issue number8
DOIs
StatePublished - Aug 1 2022

ASJC Scopus subject areas

  • Instrumentation

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