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    • 3. 发明授权
    • Controlled passive porosity systems to mitigate cavitation
    • 控制的被动孔隙系统以减轻气蚀
    • US06368059B1
    • 2002-04-09
    • US09627636
    • 2000-07-28
    • Brant H. Maines
    • Brant H. Maines
    • B64C1130
    • B63H1/15B63H1/26B63H1/28B64C11/18B64C21/025B64C2230/06B64C2230/14B64C2230/20B64C2230/22B64C2230/28Y02T50/166Y10S415/914
    • A controlled passive porosity system includes a lifting device for operation in a multi-phase liquid, the lifting device having a low pressure surface with a plurality of holes and a high pressure surface with a plurality of holes. A common plenum is disposed within the lifting device and allows fluid communication between liquid adjacent the high pressure surface and liquid adjacent the low pressure surface. When cavitation occurs adjacent to the low pressure surface, a series of valves associated with the holes allows selective and localized fluid communication between the surfaces. The fluid communication has the effect of raising the pressure of the liquid in the area of cavitation, thereby eliminating the cavitation. In an alternate embodiment, the lifting device includes a first plenum, a second plenum, and an intermediate fluid passage, the fluid passage fluidly connecting the first plenum and the second plenum. A valve disposed in the fluid passage selectively blocks or allows fluid communication between the high pressure surface and the low pressure surface to eliminate cavitation.
    • 受控的被动孔隙系统包括用于在多相液体中操作的提升装置,提升装置具有具有多个孔的低压表面和具有多个孔的高压表面。 在提升装置内设置有一个共同的通风室,并允许在邻近高压表面的液体和邻近低压表面的液体之间流体连通。 当气蚀邻近低压表面发生时,与孔相关联的一系列阀允许表面之间的选择性和局部流体连通。 流体通信具有在空化区域中提高液体的压力的效果,从而消除空化。 在替代实施例中,提升装置包括第一增压室,第二增压室和中间流体通道,流体通道流体连接第一增压室和第二增压室。 设置在流体通道中的阀选择性地阻挡或允许高压表面和低压表面之间的流体连通以消除气蚀。