Results 101 to 110 of about 309 (132)

The Yugoslav 1.5M trisonic blowdown wind tunnel

14th Aerodynamic Testing Conference, 1986
B. MEDVED, G. ELFSTROM
exaly   +2 more sources

Pressure Fluctuations in a Blowdown Wind Tunnel

Journal of the Aerospace Sciences, 1959
exaly   +2 more sources

Application of a Blowdown Wind Tunnel for Liugc- Scale Acoustic Environmental Testing

Journal of Occupational and Environmental Medicine, 1961
A unique application of a blowdown wind tunnel for intense noise testing of large components or of entire vehicles will be described. The above facility, which is primarily used for thermal structures testing, has a 12-ft diam exhaust jet which generates an extensive noise field useful for test purposes.
William H. Mayes, Philip M. Edge
openaire   +1 more source

Applications of infrared thermography in a hypersonic blowdown wind tunnel

International Congress on Instrumentation in Aerospace Simulation Facilitie, 2003
The authors describe special applications of infrared imaging for the measurement of the surface temperature distribution on models exposed to a hypersonic flow field. A number of infrared images are shown, which demonstrate the advantages and limitations of this measurement technique. In connection with image processing of an IBM computer the infrared
A. Henckels, F. Maurer
openaire   +1 more source

Transonic Flow Quality Improvements in a Blowdown Wind Tunnel

Journal of Aircraft, 1973
The development and evaluation of a new type of flow conditioning system between the control valve and stilling chamber of the Vought Systems Division 4 X 4-ft transonic-supersonic wind tunnel are reported. The new system results in a series of normal shocks created by four perforated plates to dissipate total pressure differences between the reservoir
James M. Cooksey, John W. Arnold
openaire   +1 more source

Prediction of internal and external noise fields for blowdown wind tunnels

Society of Naval Architects and Marine Engineers, and U.S. Navy, Advanced Marine Vehicles Meeting, 1972
Empirical methods have been developed to estimate the test section noise levels and the outside noise radiation patterns of blowdown wind tunnels. Included are considerations of noise generation by control valves, burners, turbulent boundary layers, and exhaust jets as appropriate.
R. HOSIER, W. MAYES
openaire   +1 more source

Methods for investigating supersonic ground effect in a blowdown wind tunnel

Shock Waves, 2008
Two methods to experimentally investigate supersonic ground effect problems in a wind tunnel have been examined to determine their relative effectiveness compared to a more realistic, but physically unfeasible, representation of the ground effect by means of a moving ground. Experimental data were compared with the results of numerical simulations. The
G. C. Doig, T. J. Barber, E. Leonardi, A. J. Neely, H. Kleine   +4 more
openaire   +1 more source

Modification of a Transonic Blowdown Wind Tunnel to Produce Oscillating Freestream Mach Number

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010
This paper details the design, construction, and evaluation of a modification to Ohio State’s 6” × 22” Transonic Wind Tunnel to enable modulation of the freestream Mach number. The test section Mach number in this blowdown facility is dynamically set by varying the choke area in a harmonic fashion.
Kyle Gompertz, Christopher Jensen, Pradeep Kumar, Di Peng, James W. Gregory, Jeffrey P. Bons   +5 more
openaire   +1 more source

Some problems in design and operation of blowdown wind tunnels

ZAMP Zeitschrift für Angewandte Mathematik und Physik, 1958
On rapporte sur la construction et la performance d'un modele de 12,5 cm×12,5 cm d'une soufflerie a rafale. En particulier, on discute les resultats experimentaux sur le controle de la temperature et pression d'arret, la stabilisation de la veine dans la chambre de tranquillisation et la performance d'un diffuseur reglable utilise aux nombres deMach ...
openaire   +1 more source

The Impact of Pressure Regulators on the Runtime and Energy Savings of Supersonic Blowdown Wind Tunnels

Applied Mechanics and Materials, 2016
Pressure regulators have a great impact on the runtime and energy savings of supersonic wind tunnels. In order to investigate this impact quantitatively the theoretical isentropic (ideal) equations for the supersonic wind tunnel flow were compared with viscous CFD computations.
Philipp Epple, Michael Steppert, Michael Steber   +2 more
openaire   +1 more source