Experimental Study of Ground Effect on Horizontal Tail Effectiveness of a Conceptual Advanced Jet Trainer

AbstractThis research has provided the results for a static test of a conceptual advanced jet trainer (CAJT) aircraft in a low-speed wind tunnel within take-off and landing angle of attack limits. Test data includes longitudinal aerodynamic properties in take-off and landing phases. The analysis inc...

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Bibliographic Details
Published in:Journal of aerospace engineering 2020-07, Vol.33 (4)
Main Authors: Shams Taleghani, Arash, Ghajar, Arsalan, Masdari, Mehran
Format: Article
Language:English
Subjects:
Aerodynamic coefficients
Aerodynamic forces
Aerodynamics
Angle of attack
Case Studies
Case Study
Circuits
Fluid flow
Ground effect (aerodynamics)
Ground-based observation
Landing
Lift
Longitudinal stability
Low speed wind tunnels
Pitching moments
Reynolds number
Stability analysis
Static tests
Takeoff
Wind tunnel testing
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Summary:AbstractThis research has provided the results for a static test of a conceptual advanced jet trainer (CAJT) aircraft in a low-speed wind tunnel within take-off and landing angle of attack limits. Test data includes longitudinal aerodynamic properties in take-off and landing phases. The analysis includes characteristics for lift and longitudinal stability, horizontal tail effectiveness, and studying the ground effect on the longitudinal aerodynamic properties. The tests have a Reynolds number of more than 1 million. Experiments were conducted in a low-speed, closed-circuit wind tunnel with a test section of 2.2 m width and 2.8 m height. The tests consist of measuring aerodynamic forces and moments using the six-component balance for strain metering. The slope of lift coefficient curve, lift coefficient value, and maximum aerodynamic efficiency value increase due to the presence of the ground. Also, the total aerodynamic center location moves backward as a result of the presence of the ground. It was observed by comparing the data for ground effect with those for out-of-ground effect that ground proximity significantly increases horizontal tail effectiveness as a component of pitching moment control.
ISSN:0893-1321
1943-5525
DOI:10.1061/(ASCE)AS.1943-5525.0001140