Results 191 to 200 of about 15,113 (249)
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14th Aerodynamic Testing Conference, 1986
The optimum facility to complement existing high Reynolds number transonic wind tunnels is discussed. It is proposed that the facility be cryogenic, have a total pressure of five atmospheres or less, and have a test section on the order of 4- to 5-meters square.
R. BARNWELL +3 more
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The optimum facility to complement existing high Reynolds number transonic wind tunnels is discussed. It is proposed that the facility be cryogenic, have a total pressure of five atmospheres or less, and have a test section on the order of 4- to 5-meters square.
R. BARNWELL +3 more
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2020
As the air flow around an aircraft is not uniform, locally supersonic zones may exist even under subsonic upstream flow condition, this defines the transonic regime, a condition where both subsonic and supersonic regions coexist.
Bruno Chanetz +5 more
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As the air flow around an aircraft is not uniform, locally supersonic zones may exist even under subsonic upstream flow condition, this defines the transonic regime, a condition where both subsonic and supersonic regions coexist.
Bruno Chanetz +5 more
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Noise reduction in transonic wind tunnels
The Journal of the Acoustical Society of America, 1974The phenomena of background noise generation in transonic wind tunnels are analyzed. In unsteady aerodynamic tests, background disturbances create problems because the instrumentation senses them in addition to the fluctuations generated by the aerodynamic flow over wind-tunnel models.
George F. McCanless, James R. Boone
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A method for transonic wind-tunnel corrections.
AIAA Journal, 197314 Lighthill, M. J., "The Hodograph Transformation in Trans-sonic Flow," Proceedings of the Royal Society, London, Ser. A, Vol. 191, 1947, pp. 323-369, Vol. 192, 1948, pp. 135-142. Goldstein, S., Lighthill, M. J., and Craggs, J. W., "On the Hodograph Transformation for High-Speed Flow," The Quarterly Journal of Mechanics and Applied Mathematics, Vol. 1,
Antonio Ferri, Paolo Baronti
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Transonic Wind Tunnel Interference Assessment - Axisymmetric Flows
AIAA Journal, 1979A wind tunnel interference assessment concept that presents a rational predictive means of wall interference analysis is evaluated. The procedure consists of employing as an outer boundary condition an experimentall y measured pressure distribution along a convenient control surface located inward from the actual tunnel walls.
S. STAHARA, J. SPREITER
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Transonic wind-tunnel wall interference prediction code
Journal of Aircraft, 1988A small disturbance transonic wall interference prediction code has been developed that is capable of modeling solid, open, perforated, and slotted walls as well as slotted and solid walls with viscous effects. This code was developed by modifying the outer boundary conditions of an existing aerodynamic wing-body-pod-pylon-winglet analysis code.
PAMELA PHILLIPS, EDGAR WAGGONER
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Transonic wind tunnel test sections
ZAMP Zeitschrift für angewandte Mathematik und Physik, 1956Um von Windkanalversuchen auf die Verhaltnisse beim freien Flug schliessen zu konnen, mussen die Einflusse der Kanalwande auf die Geschwindigkeitsverteilung am Modell berucksichtigt werden. Bei schallnaher Stromung sind diese Einflusse an Modellen ublicher Grosse so stark, dass sie die Messungen vollstandig verfalschen.
Maeder, Paul F., Wood, Albert D.
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Generation of vertical gusts in a transonic wind tunnel
Experiments in Fluids, 2015This article reports on the qualification of a gust generator device in a transonic wind tunnel. A vanning apparatus has been installed in the contraction of the S3Ch transonic wind tunnel at the ONERA Meudon center in order to generate up and down air movements in the test section.
V. Brion +6 more
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Acoustic Testing in Transonic Wind Tunnels
44th AIAA Aerospace Sciences Meeting and Exhibit, 2006The historical reason for conducting noise measurement in transonic wind tunnels was to attempt an explanation for differences in aerodynamic data caused by boundary layer transition. More recently noise measurement at transonic speed has become useful in its own right.
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Transonic industrial wind tunnel testing in the 2020s
The Aeronautical Journal, 2021AbstractWind tunnels remain an essential element in the design and development of flight vehicles. However, graduates in aerospace engineering tend to have had little exposure to the demands of industrial experimental work, particularly at high speed, a situation exacerbated by a lack of up-to-date reference material.
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