Laminar-to-turbulent transition on a rotor blade in hover has been imaged using an area-scan infrared camera. A new method for tracking a blade using a rotating mirror was employed. The mirror axis of rotation roughly corresponded to the rotor axis of rotation and the mirror rotational frequency is 1/2 that of the rotor. This permitted the use of cameras whose integration time was too long to prevent image blur due to the motion of the blade. This article will show the use of this method for a rotor blade at different collective pitch angles.
Boundary Layer Transition Detection on a Rotor Blade Using Rotating Mirror Thermography
AHS Decenial Specialist Meeting, Aeromechanics ; 2014 ; San Francisco, CA, United States
2014-01-22
Conference paper
No indication
English
Unsteady Boundary Layer Transition Measurements by Differential Infrared Thermography
British Library Conference Proceedings | 2014
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