대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제31권6호
  • /
  • Pages.460-466
  • /
  • 2009
  • /
  • 1225-5025(pISSN)
  • /
  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
권호 표지

간이상수도에서의 혼합유동에 대한 수치해석

Numerical Analysis of Mixing Flow in a Small-Scale Water Supply System

  • 유영현 (순천대학교 대학원 기계공학과) ;
  • 기현 (순천대학교 대학원 기계공학과) ;
  • 최종욱 (순천대학교 기계우주항공공학부) ;
  • 김성초 (순천대학교 기계우주항공공학부) ;
  • 김용선 (석성기업(주)) ;
  • 이용호 (전남대학교 기계자동차공학부)
  • Yoo, Young-Hyun (Department of Mechanical Engineering, Graduate School, Sunchon National University) ;
  • Ki, Hyun (Department of Mechanical Engineering, Graduate School, Sunchon National University) ;
  • Choi, Jong-Wook (School of Mechanical and Aerospace Engineering, Sunchon National University) ;
  • Kim, Sung-Cho (School of Mechanical and Aerospace Engineering, Sunchon National University) ;
  • Kim, Yong-Seon (Suck sung Co., LTD) ;
  • Lee, Yong-Ho (Department of Mechanical-Automotive Engineering, Chonnam National University)
  • 발행 : 2009.06.30
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초록

간이상수도 시스템에서 공급하는 식수는 일정한 잔류 약품(염소)량을 유지해야 하기 때문에 물과 약품의 혼합방법은 매우 중요하다. 본 연구에서는 물과 약품의 혼합방법을 최적화하기 위하여, 4가지 모델에 대한 농도분포 및 혼합지수를 구하였다. 그중 2가지 모델에 대해서는 혼합효과가 높게 나타났다. 하나는 지하수 공급 파이프 중앙에 약품을 공급하는 모델이고, 또 다른 하나는 약품공급 파이프 하류에 반원형태의 블록을 설치한 모델이다. 이러한 모델들은 유동의 확산 및 교란을 야기시켜 혼합효과를 증가시키는 결과를 가져왔다. 이와 같은 수치해석 결과는 최적의 혼합효과를 얻기 위한 시스템을 설계하는데 도움이 될 것으로 기대된다.

The mixing method of water and chemicals is significant in a small-scale water supply system because drinking water should be supplied with a certain quantity of remaining chemicals maintained. In the present study, the concentration distribution and the mixing index were obtained from four models, which were to find out the optimal mixing method of water and chemicals. The two models brought the good mixing effects out of the four, one for providing chemicals from the center of water supply pipe and the other for setting up the semicircle block at the downstream of the chemicals-providing pipe. As a result, the mixing effect was found out to be increased due to the diffusion and the disturbance of flows. In conclusion, these numerical results are expected to contribute to designing the optimal mixing system.

키워드

참고문헌

  1. Song, H. S., Kim, J. W., and Bae, B. W., "Chlorine Disinfection for Inactivating Indicator Microorganisms for Wastewater Treatment," Proceedings of the Korean Society of Environmental Engineers, Korean Society of Environmental Engineers, Daejeon, pp. 527-530(2003)
  2. Jeong, E. H., Yoon, S. Y., and Kim, K. C., "Simultaneous Measurement of Velocity and Concentration Field in a Stirred Mixer using PIVILIF Technique," Trans. of the KSME(B), 27(4), 504-510(2003)
  3. Cho, I. Y., Kim, B. K., Lee, 1. P., Lee, H. D., and Kim, S. H., "Comparison of the Dynamic Inverse Chlorine Models Considering the Diffusion Effect," J. Kor. Soc. Environ. Eng., 25(6), 716-722(2003)
  4. Kim, D. K., Bae, S. T., Kim, J. H., Kim, O. K., and Lee, Y. H., "A Study about Choice of Industrial Mixer's Impeller Type for Concentration Measurement Method and PIV," J. Kor. Soc. Marine Eng., 30(3), 413-419 (2006)
  5. Costin, D. C. and Synovec, E. R., "Measuring the transverse concentration gradient between adjacent laminar flows in a microfludic device by a laser-based refractive index gradient detector," Talanta, 58(3), 551-560(2002) https://doi.org/10.1016/S0039-9140(02)00321-1
  6. Beebe, J. D., Adrian, J. R., Olsen, G. M, Stremler, A. M., Aref, H., and Jo, B., "Passive mixing in microchannels: Fabrication and flow experiments," Mec. Ind., 2, 343-348(2001)
  7. Suh, Y. K., "On the Problem of Using Mixing Index Based on the Concentration Dispersion," Trans. of the KSME(B), 30(8), 796-805(2006)
  8. Kim, Y., An, S., and Maeng, J., "The Effect of Karman Vortex for Mixing in a Micro-channel with an Oscillating Micro-stirrer," Trans. of the KSME(B), 30(2), 144-152(2006)
  9. Lee, D. S., Kim, H. G., Ha, M. Y., Park, Y. H., and Park, I. M., "Mixing Effect by the Geometry of Static Mixer with Turbulent In-Situ Mixing," Trans. of the KSME(B), 29(12), 1307-1312(2005)
  10. Maeng, J., Cho, I., and Kim, B., "Prediction of Degree of Mixing for Insoluble Solution with Vortex Index in a Passive Micromixer," Trans. of the KSME(B), 29(2), 232-238(2005)
  11. Shin, M. S., Kim, H. S., Jang, D. S., Lee, S. N., and Lee, Y. S., "A Numerical and Experimental Study on the Mixing Characteristics of Stratified Thermal Storage," Environ. Eng. Res., 8(1), 41-47(2003) https://doi.org/10.4491/eer.2003.8.1.041
  12. Ansys CFX-Solver, Release 10.0 : Theory(2005)
  13. Ansys CFX-Solver, Release 10.0 : modeling(2005)