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Effect of Air Layer on the Performance of an Open Ducted Cross Flow Turbine 원문보기

한국유체기계학회 논문집 = The KSFM journal of fluid machinery, v.18 no.1, 2015년, pp.11 - 19  

Wei, Qingsheng (Graduate school, Department of Mechanical Engineering, Mokpo National University) ,  Chen, Zhenmu (Graduate school, Department of Mechanical Engineering, Mokpo National University) ,  Singh, Patrick Mark (Graduate school, Department of Mechanical Engineering, Mokpo National University) ,  Choi, Young-Do (Department of Mechanical Engineering, Institute of New and Renewable Energy Technology Research, Mokpo National University)

Abstract ▼ AI-Helper 아이콘AI-Helper

Recently, the cross flow turbines attract more attention for their good performance over a large operating regime at off design point. This study employs a very low head cross flow turbine, which has open inlet duct and has barely been studied before, to investigate the performance of the cross flow...

주제어

#개방 덕트형 횡류수차   #공기층   #초저낙차   #성능   #내부유동  

AI 본문요약
AI-Helper 아이콘 AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

제안 방법

  • This study tries to employ an air suction pipe behind the rear part of the runner. The purpose of this study is not only to investigate the effect of air layer for a 1.5m head of cross flow turbine which is barely studied before, but also to verify the effectiveness of air layer formation in the runner passage. Two-phase flow transient analysis is conducted under the condition of gravity to embody the air-layer effect.
  • (6), Durgin(7) and Costa Pereira(8). The works included details concerning the influence of the number of blades, outside diameter of the runner and admission arc of the nozzle on the turbine efficiency, which offers a guideline for the turbine design. However, in this study, as this turbine has a very low head of below 1.

이론/모형

  • This study employs a commercial CFD code of ANSYS CFX(10) to conduct CFD analysis. Two-dimensional CFD analysis is applied to shorten the calculating time and reduce the computational cost, which means that the transverse flow along the thickness direction is not considered in this study.
본문요약 정보가 도움이 되었나요?

참고문헌 (13)

  1. Haimerl, L. A., 1960, The Cross-Flow Turbine, Water Power Engineering Magazine. 

  2. Andrade, J. D., Curiel, C., Kenyery, F., Aguillon, O., Vasquez, A., and Asuaje, M., 2011, "Numerical Investigation of the Internal Flow in a Banki Turbine," International Journal of Rotating Machinery, Vol. 2011, pp. 1-12. 

    상세보기

  3. Mockmore. C. A. and Merryfield, F., 1949, "The Banki Water Turbine," Bulletin Series, No. 25. 

  4. Chandran, A. T., Anil, G. and Chandapillai, J., 2010, "Development and Testing of a Cross Flow Turbine," International Group for Hydraulic Efficiency Measurement. 

  5. Nasir, B. A., 2013, "Design of High Efficiency Cross-Flow Turbine for Hydro-Power Plant," International Journal of Engineering and Advanced Technology, Vol. 2, No. 3, pp. 308-311. 

  6. Khosrowpanah, S., Fiuzat, A. and Albertson, M., 1988, "Experimental Study of Cross-Flow Turbine," Journal of Hydraulic Engineering, Vol. 114, No. 3, pp. 299-314. 

    상세보기 crossref

  7. Durgin, W. W. and Fay, W. K., 1984, "Some Fluid Flow Characteristics of a Cross Flow Type Hydraulic Turbine," Small Hydro Power Machinery. 

  8. Costa Pereira, N. H. and Borges, J. E., 1996, "Study of the Nozzle Flow in a Cross-Flow Turbine," International Journal of Mechanical Sciences, Vol. 38, No. 3, pp. 283-302. 

    상세보기 crossref

  9. Choi, Y. D., Shin, B. R. and Lee, Y. H., 2010, "Air Layer Effect on the Performance Improvement of a Cross-Flow Hydro Turbine," Journal of Fluid Machinery, Vol. 13, No. 4, pp. 37-43. 

  10. ANSYS Inc., ANSYS CFX Documentation,ver. 13, 2012, http://www.ansys.com. 

  11. Ariff, M., Salim, S. M. and Cheah, S. C., 2009, "Wall Y+ Approach for Dealing with Turbulent Flow Over a Surface Mounted Cube: Part 1 . Low Reynolds Number," Proceeding of Seventh International Conference on CFD in the Minerals and Process Industries, CSIRO, Melbourne, Australia. 

  12. Ariff, M., Salim, S. M. and Cheah, S. C., 2009, "Wall Y+ Approach for Dealing with Turbulent Flow Over a Surface Mounted Cube: Part 2 . High Reynolds Number," Proceeding of Seventh International Conference on CFD in the Minerals and Process Industries, CSIRO, Melbourne, Australia. 

  13. Verhaart, P., 1983, Blade Calculations for Water Turbines of the Banki Type, Eindhoven University of Technology. 

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