Authors

Presenter(s)

Jielong "Jacky" Cai

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Description

We extend our recent propeller ground-effect study to consider a circular ground-plate, instead of planar-surface of assumed infinite extent. Parameter studies include propeller to plate diameter ratio, propeller diameter to ground-offset ratio, and propeller pitch to diameter ratio. As with classical ground effect, benefits of thrust-augmentation and/or power-reduction with proximity to the ground, depend on the propeller pitch to diameter ratio. Flow visualization suggests that for larger pitch to diameter ratio, the lack of conclusively large ground-effect benefits can be attributed to stalled flow about the blade, and spatially more diffuse tip-vortices. A circular ground-plate of half of the propeller diameter was found to have almost no distinction from that of an unimpeded free-stream, while when the plate and propeller have the same diameter, the resulting ground-effect already resembles that of the infinite-plate.

Publication Date

4-22-2020

Project Designation

Graduate Research

Primary Advisor

Sid Gunasekaran

Primary Advisor's Department

Mechanical and Aerospace Engineering

Keywords

Stander Symposium Posters, School of Engineering

Propeller Partial Ground Effect

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