Journal
FLUIDS
Volume 8, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/fluids8050146
Keywords
aerodynamics; sensor; nature inspired
Categories
Ask authors/readers for more resources
This paper introduces a novel approach to sense and characterize flow over an aerofoil using arrays of flexible wind-hair-like sensors. The sensors provide real-time readings of local flow information with high temporal resolution, and were tested in a wind tunnel with varying angles of attack. The sensors were able to detect low-frequency oscillations, potentially linked to the breathing modes of the laminar separation bubble.
A novel approach for sensing and characterising the flow over an aerofoil is introduced. Arrays of flexible wind-hair-like sensors distributed over an aerofoil, which are tracked remotely using high-speed imaging and processing, acting as digital tufts, are used to provide real-time readings of local flow information with high temporal resolution. The use case presented in this paper has the sensors embedded within the suction side of a NACA0012 aerofoil and tested in a wind tunnel for varying angles of attack in static and dynamic tests. The time-averaged signals were able to provide information pertaining to the free-stream velocity and instantaneous angle of attack. The capability of the sensor type to provide temporal flow information is also explored. The sensors were used to detect low-frequency oscillations, which are pre-cursory to stall. These are hypothesised to be linked to breathing modes of the laminar separation bubble, causing a shear-layer flapping observed on the sensors. Such low-frequency oscillations were also detected shortly before separation in the ramp-up studies.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available