Hull surface air lubrication structure for marine vehicles
Number of patents in Portfolio can not be more than 2000
United States of America
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May 3, 2022
Grant Date -
Oct 28, 2021
app pub date -
Apr 24, 2020
filing date -
Apr 24, 2020
priority date (Note) -
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Abstract
The present invention is a device to reduce the skin friction drag on the hull surface of a marine vehicle. The device is in a form of a channel having a wider portion facing an incoming water stream (inlet) and a narrower portion (outlet) installed over an air orifice on the hull surface, forming an array of channels. A stream of water, generated by a marine vehicle motion, enters the channels and creates a low pressure region that pulls the air into the stream of water through the air intake holes, creating a stream of air bubbles. This structure increases water flow velocity close to each air orifice, creates larger turbulent components passing through and over each channel, injects more bubbles, and avoids dispersion of air bubbles to improve the existing skin friction drag.
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