Design and development of a wind tunnel model for high angle of attack active control experiments

1997 ◽  
Author(s):  
G. Papageorgiou ◽  
K. Glover
Keyword(s):  
Wind Tunnel ◽  
Active Control ◽  
Angle Of Attack ◽  
High Angle ◽  
Design And Development ◽  
High Angle Of Attack ◽  
Wind Tunnel Model ◽  
Tunnel Model

scholarly journals Laser Displacement Sensors for Wind Tunnel Model Position Measurements

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4085 ◽  
Author(s):  
Matthew Kuester ◽  
Nanyaporn Intaratep ◽  
Aurélien Borgoltz
Keyword(s):  
Wind Tunnel ◽  
Angle Of Attack ◽  
Pitching Moment ◽  
Two Dimensional ◽  
Temperature Drift ◽  
Wind Tunnel Model ◽  
Multiple Sensors ◽  
Displacement Sensors ◽  
Tunnel Model ◽  
Linear Encoder

Wind tunnel measurements of two-dimensional wing sections, or airfoils, are the building block of aerodynamic predictions for many aerodynamic applications. In these experiments, the forces and pitching moment on the airfoil are measured as a function of the orientation of the airfoil relative to the incoming airflow. Small changes in this angle (called the angle of attack, or α ) can create significant changes in the forces and moments, so accurately measuring the angle of attack is critical in these experiments. This work describes the implementation of laser displacement sensors in a wind tunnel; the sensors measured the distance between the wind tunnel walls and the airfoil, which was then used to calculate the model position. The uncertainty in the measured laser distances, based on the sensor resolution and temperature drift, is comparable to the uncertainty in traditional linear encoder measurements. Distances from multiple sensors showed small, but statistically significant, amounts of model deflection and rotation that would otherwise not have been detected, allowing for an improved angle of attack measurement.

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