Results 91 to 100 of about 309 (132)

An Evaluation of the Design, and A Theoretical Study of the Simulation Capabilty of an Eight-Megawatt Arc-Heated Hypersonic Wind Tunnel Facility, UARI Research Report No. 15

, 1964
The capabilities and limitations of an arc heated blowdown wind tunnel to simulate flow parameters of a re-entering ICBM are investigated theoretically. Particular numerical examples apply to the eight-megawatt tunnel of the Physical Sciences Laboratory,
Yalamanchili, Janardanaoo, Dowdle, Joseph C., Winter, Edgar R.F.   +2 more
core  

An Investigation of a Variable Geometry Diffuser for FTU\u27s Four Inch Supersonic Wind Tunnel

, 1977
The primary object of the investigation reported in this paper was to obtain information that would aid in the design of a more efficient diffuser for FTU\u27s tunnel, and thus increase the run time.
Freed, William Robert
core  

Performing Particle Image Velocimetry in a Supersonic Wind Tunnel Using Carbon Dioxide as the Seed Material

, 2007
Particle image velocimetry (PIV) was performed utilizing clean seed particles generated by injecting liquid carbon dioxide (CO2) directly into an open-circuit blowdown Mach 2.9 supersonic wind tunnel.
Peltier, Donald W., III
core  

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Supersonic Blowdown Wind Tunnel Control Using LabVIEW

46th AIAA Aerospace Sciences Meeting and Exhibit, 2008
A computer-based, proportional-integral control system for supersonic blowdown wind tunnels was developed in a LabVIEW environment. The control algorithm is based on numerically integrating the differential equations used to model a supersonic blowdown wind tunnel in which the proportional and integral control terms were added and tuned in a simulation
Frank K Lu
exaly   +2 more sources

Diagnostic simulation of a pneumatically controlled blowdown wind tunnel

Simulation, 1973
The nonlinear differential equations required to correctly model the plenum pressure history of a pneumatically controlled blowdown wind tunnel are derived,and arguments in favor of digital simulation of the full nonlinear equations as opposed to conven tional linearized analysis are presented.
exaly   +2 more sources

Basic Experiments on a Cryogenic Wind Tunnel of Flashing-Blowdown Type

Advances in Cryogenic Engineering, 1996
This paper deals with the experimental approach to a new concept of cryogenic wind tunnel of short duration. In the last two decades various closed-cycle and continuous operation (CCCO) cryogenic wind tunnels have been developed and they have shown many advantages for high Reynolds number experiments.
Maeno K
exaly   +2 more sources

Model sting support with hard metal core for measurement in the blowdown pressurized wind tunnel

Measurement: Journal of the International Measurement Confederation, 2016
Abstract The wind tunnel model, balance and sting are exposed to the large transient load in the blowdown wind tunnels. As part of the research, in order to improve wind tunnel testing, a new high stiffness sting for testing in the T-38 wind tunnel is developed.
Dušan Ćurčić, Marija Samardžić, Dragan Marinkovski, Zoran Rajić, Zoran Anastasijević   +4 more
exaly   +2 more sources

Advanced Flow Control for Supersonic Blowdown Wind Tunnel Using Extended Kalman Filter

Journal of Dynamic Systems, Measurement, and Control, 2013
Supersonic blowdown wind tunnels provide controlled test environments for aerodynamic research on scaled models. During the experiments, the stagnation pressure in the test section is required to remain constant. Due to nonlinearity and distributed characteristics of the controlled system, a robust controller with effective flow control algorithms is ...
Mian Li, Li Mian
exaly   +2 more sources

Apparatus for measurement of pitch and yaw damping derivatives in high Reynolds number blowdown wind tunnel

Measurement: Journal of the International Measurement Confederation, 2013
Abstract The pitch/yaw apparatus designed for the measurement of the moment derivative due to an aircraft or missile model angular oscillatory motion in a wind tunnel test section is presented. A model is forced to oscillate with the primary angular oscillation around its transversal axis (pitch or yaw).
Jovan Isakovic
exaly   +2 more sources

Flow Quality Improvements in a Blowdown Wind Tunnel

Journal of Aircraft, 2001
Rajan Kumar
exaly   +2 more sources