Hydrocyclone has a good prospect in the treatment of ballast water due to its unique advantages such as handiness and safety in operation, cost effective and no pollution associated.

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Sandbars swirl beneath Oregon Inlet in Cape Hatteras National Seashore on North Carolina's Outer Banks.

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Boundary value problems in classical hydrodynamics are usually transformed from the physical plane to velocity plane by hodograph method.

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The sensitivity of parameters are analyzed, and results show that the hydrocyclone, acting as an energy divider, is the core of downhole oil water separation system, and the production of oil formation as well as the injectivity of injection zone have great impact on the designing result.

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These results will provide some theoretical basis for design and optimization of the swirl injector.

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The influences of the shape of intake port and offset of valve on the characteristics of flow field and swirl ratio were analyzed.

計(jì)算表明：螺旋氣道斜坡段產(chǎn)生的氣流角動量是氣流在氣缸內(nèi)形成旋流的主要原因。

In sum, in the case of laminar flow, the outside helical flow would have a little influence on MF of purity water.

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For the filtration of suspension, on the other hand, it does enhance the MF flux.

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The cyclones with short cone are used for crude grading of minerals with heavier specific gravity in gold mines, sand gold mir.es and sulphur ore mines and have such advantages as small ground occupation, high capacity, high operating flexibility, low energy consumption and high movability etc.

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In recent years, with the development of large capacity and high parameter unit of power station in our country, and the introduction of advanced large boiler manufacture, some new technology of swirling burners are used much more in the power stations.

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