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Evaluation for the Numerical Model of a Micro-Bubble Pump

미세버블펌프 수치모델평가 및 검증

LEE, SANG-MOON;JANG, CHOON-MAN
이상문;장춘만

  • Received : 2015.12.02
  • Accepted : 2016.02.28
  • Published : 2016.02.29

Abstract

Hydraulic performance of a micro-bubble pump has been analyzed by numerical simulation and experimental measurements. Flow recirculation apparatus between the pump inlet and outlet reserviors has been adopted to measure pump performance according to flow conditions sequentially. To analyze three-dimensional flow field in the micro-bubble pump, general analysis code, CFX, is employed. SST turbulence model is employed to estimate the eddy viscosity and compared the pump performance to k-${\varepsilon}$ model. Unstructured grids are used to represent a composite grid system including blade, casing and inlet casing. It is found that the numerical model used in the present study is effective to evaluate the pump performance. From the numerical simulation, low velocity region due to pressure loss is decreased where pump efficiency has maximum value. Detailed flow field inside the micro-bubble pump is also analyzed and compared.

Keywords

Micro-bubble pump;Numerical model;Experimental apparatus;Performance curve;Turbulence model

References

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Acknowledgement

Supported by : 한국건설기술연구원