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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Performance of a new micro-bubble generator with a spherical body in a flowing water tube
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Performance of a new micro-bubble generator with a spherical body in a flowing water tube

机译：新型微气泡发生器在流水管中具有球形体的性能

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摘要

A new micro-bubble generator with a spherical body in a flowing water tube has been invented, and its trial products have been tested. In the generator, pressurized water is introduced into a pipe with a spherical body in the core. From conservation equations of mass and energy, the water velocity around the body especially in a downstream region becomes higher than the inlet velocity, and thus the pressure there becomes lower. If the pressure becomes less than atmospheric pressure, air is automatically sucked into the water stream through a number of small holes drilled on the pipe wall in the lower pressure region downstream from the center of the body. Since the water flow there is highly-turbulent and shear flow, the air sucked is well broken into a great number of micro-bubbles. In the tests of its trial products, experimental data on air suction rate, hydraulic power needed to introduce water, bubble generation efficiency, and variation of dissolved oxygen in water after bubbling were obtained by changing water supply rate systematically. From the tests, we found an optimum diameter ratio of spherical body to pipe, and confirmed that the generator could generate micro-bubbles with a lesser energy consumption rate within 40W and raise effectively the dissolved oxygen, etc. (c) 2004 Elsevier Inc. All rights reserved.
机译：已经发明了一种新的在流动水管中具有球形主体的微气泡发生器，并且已经对其试验产品进行了测试。在发生器中，将加压水引入到芯为球形的管道中。根据质量和能量的守恒方程，身体周围的水流速度（尤其是在下游区域）变得高于入口速度，因此那里的压力变得更低。如果压力小于大气压，空气会通过在机体中心下游的低压区域中的管道壁上钻出的多个小孔自动吸入水流中。由于那里的水流湍流和剪切流很大，因此吸入的空气被很好地分解成大量的微气泡。在其试验产品的测试中，通过系统地改变供水速度，获得了有关吸气速率，引入水所需的水力，气泡产生效率以及鼓泡后水中溶解氧的变化的实验数据。通过测试，我们发现了球体与管道的最佳直径比，并确认该发生器可以在40W以内以较小的能量消耗率产生微气泡并有效地提高溶解氧等。（c）2004 Elsevier Inc.版权所有。

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