The Use of an Intertial-Gyro System for Model Attitude Measurement in a Blow-Down Wind Tunnel

2005 ◽  
Author(s):  
Mathew Rueger
Keyword(s):  
Wind Tunnel ◽  
Attitude Measurement ◽  
Blow Down ◽  
Gyro System

Design of a continuous portable indraft supersonic wind tunnel

2020 ◽  
pp. 030641902090734
Author(s):  
Monty Bruckman II ◽  
Lance W Traub
Keyword(s):  
Mach Number ◽  
Wind Tunnel ◽  
Sound Level ◽  
Wind Tunnels ◽  
Supersonic Wind Tunnel ◽  
Blow Down ◽  
Hands On ◽  
Compressible Fluid Flow ◽  
Aeronautical Engineering ◽  
Design And Manufacture

Programs in mechanical and aeronautical engineering commonly include courses in compressible fluid flow. As such, learning can be greatly enhanced if theory is taught in conjunction with hands on experimentation. While supersonic wind tunnels are not uncommon at many universities, such facilities are generally of the blow down configuration. Consequently, run time is very short and ear protection is required during operation, potentially hindering instruction. Furthermore, blow down configurations are typically expensive and large. This article presents the design and manufacture of a continuous, indraft, miniature supersonic wind tunnel. The tunnel was designed for a nominal test section Mach number of 2; validation indicated a Mach number of 1.96 was achieved. Vacuum was provided by a regenerative blower. The facility is portable and quiet; measurements indicated that the sound level around the tunnel when operational was less than 81 dB (compared to 119dB generated by the department’s blow down supersonic wind tunnel).

Investigation of OpenCV Image Processing Technique Applied in Wind Tunnel Ice-Shape Measurement

2012 ◽  
Vol 220-223 ◽  
pp. 1350-1355
Author(s):  
Long Zhang ◽  
Jian Jun Yang ◽  
Jun Zhang
Keyword(s):  
Image Processing ◽  
Wind Tunnel ◽  
Camera Calibration ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Shape Measurement ◽  
Attitude Measurement ◽  
Good Reproducibility ◽  
Research Model ◽  
Post Processing

Model ice-shape measurement is an essential part in the icing test in wind tunnel. The principle investigation of camera calibration and image processing technology based on OpenCV library which apply to ice-shape measurement in wind tunnel is presented in this paper. A kind of software with perfect function and good reproducibility was successfully developed. Ice-shape measurement test was conducted in wind tunnel and the application of OpenCV library in image post-processing was proved to be practical. This program can also be effectively used in aero-optics research, model attitude measurement and model deformation measurement in wind tunnel.

Development of the Reattached Flow Behind Surface-Mounted Two-Dimensional Prisms

1988 ◽  
Vol 110 (2) ◽  
pp. 127-133 ◽  
Author(s):  
J. Antoniou ◽  
G. Bergeles
Keyword(s):  
Boundary Layer ◽  
Wind Tunnel ◽  
Open Circuit ◽  
Two Dimensional ◽  
Blow Down ◽  
Length Scales ◽  
Turbulent Eddies ◽  
Flow Parameters ◽  
Varying Length ◽  
Dimensional Surface

Velocity and turbulence measurements are presented for the region after reattachment behind a two dimensional surface-mounted prism of varying length. The prism is mounted on the floor of an open circuit blow down wind tunnel and flow parameters for the developing boundary layer are deduced from the measurements; longitudinal integral time and length scales are estimated through autocorrelations. Reattchment on top of the prism, due to its increased length, affects the characteristics of the developing boundary layer; in this case the shear layer originating from the up-stream edge of the prism splits twice at reattachment points on top and behind the prism and the integral length scales of the turbulent eddies are found to be smaller due to the splitting.

CVL application for supersonic wind tunnel of blow-down type

1994 ◽  
Author(s):  
T. Fujimoto ◽  
S. Sawaguchi ◽  
K. Hanawa
Keyword(s):  
Wind Tunnel ◽  
Supersonic Wind Tunnel ◽  
Blow Down
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