Excrescence Drag on Aircraft Skin Repairs

by Laksham, Sanassee
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Laksham, Sanassee Excrescence Drag on Aircraft Skin Repairs
Laksham, Sanassee - Excrescence Drag on Aircraft Skin Repairs

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This report describes the computational study of excrescence drag caused by repair patches mounted on a 2D M2822 aerofoil section at different position along the chord and the results are then compared with the semi-empirical methods used by Aviation companies. A comparison is also studied to compare the approach from the CVGKE calculation method which is used in this report with the BVGKE calculation method that is used to derive the empirical charts for both flow with and without shock wave. The tests have been carried out with high subsonic and transonic flow and the effect of geometry type is also taken into consideration. It is observed that the increment in boundary layer displacement thickness suggested to be implemented at the excrescence location by Patel and Lock was not high enough and therefore resulted to a higher drag magnification factor than the empirical data. Excrescences placed at the location of the shock wave caused a significant reduced in the overall drag coefficient and the interaction between the shock and the excrescence placed upstream of the shock could lead to either a decrease or increase in wave drag depending on its location.


Laksham, Sanassee

Further information

Biography Artist:
Mr Sanassee Laksham, Bachelor of Engineering in Aeronautical Engineering and a Master of Science in Structural Engineering has a keen interest in structural, stress analysis and finite element modelling of thin-walled structures. He also maintains a strategic interest in the commercial application of Computational Fluid Dynamics.
Number of Pages:
Media Type:
Éditions universitaires européennes

Master Data

Product Type:
Paperback book
Release date:
December 1, 2016
Package Dimensions:
0.22 x 0.15 x 0.008 m; 0.245 kg
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