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Co-Flow Studies ar Subsonic Speeds

Marks, Aryeh

[Thesis]. Manchester, UK: The University of Manchester; 2011.

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Abstract

This report investigates the effect of a coflow on the aerodynamic performance of a flat plate. The aim is to achieve an increase in the performance of the baseline plate. Variations in the angle of attack are used to determine the affect of the pressure gradient on the results of the pressure distribution along the suction side of the plate. Hot wire anemometry is used to determine the velocity profile at specific locations along the plate.A discussion on the current state of the art is included as a backgrounf to the work and the clear aerodynamic benefits of thsi form of active flow control are explained.Results are shown for various values of injection momentum coefficient and a discussion follows with regards to the suitability of using this value as a sole parameter when choosing a coflow system since the benefits are only realised when the injected flow is at a higher velocity than the free stream.A section on future work is included which outlines basic modifications to the current equipment and provides suggections for more advanced setups in the future.Full CAD drawings of the experimental apparatus are provided as an appendix.