发明名称 |
Method and device for low-noise underwater propulsion and for reducing hull drag |
摘要 |
A method and apparatus is disclosed for producing propulsion underwater with minimal acoustical emission. In basic concept, the method comprises the expulsion and sucking of liquid into and out of a liquid port of a watercraft in a manner generating compression and expansion waves adjacent the liquid port. Such expansion and compression waves generate a positive net thrust on the watercraft in a direction opposite that of their expulsion. Also disclosed is a method and apparatus for reducing the drag caused by hull skin friction by actively increasing the momentum of the liquid stream boundary layer adjacent a watercraft via the expulsion of fluid (liquid or gas) from ports in the hull of such a watercraft.
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申请公布号 |
US6860770(B2) |
申请公布日期 |
2005.03.01 |
申请号 |
US20030631125 |
申请日期 |
2003.07.31 |
申请人 |
THE BOEING COMPANY |
发明人 |
HASSAN AHMED A.;DOMZALSKI DAVID B. |
分类号 |
B63H11/06;F04B17/04;(IPC1-7):B63H11/00 |
主分类号 |
B63H11/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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