Calibration and performance characterization of a Mach 5 Ludwieg tube

Calibration and performance characterization of a Mach 5 Ludwieg tube. Bearden, K. P., Padilla, V. E., Taubert, L., & Craig, S. A. Review of Scientific Instruments, 93(8):085104, August, 2022.

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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.

@article{bearden2022,
	title = {Calibration and performance characterization of a {Mach} 5 {Ludwieg} tube},
	volume = {93},
	issn = {0034-6748},
	url = {https://doi.org/10.1063/5.0093052},
	doi = {10.1063/5.0093052},
	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.},
	number = {8},
	urldate = {2023-08-08},
	journal = {Review of Scientific Instruments},
	author = {Bearden, Kyle P. and Padilla, Victor E. and Taubert, Lutz and Craig, Stuart A.},
	month = aug,
	year = {2022},
	pages = {085104},
}

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