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L형 수제주변 흐름특성 변화에 대한 실험연구

Experimental Study on Flow Characteristic of L-type Groyne

  • 강준구 (한국건설기술연구원 하천.해안연구실) ;
  • 여홍구 (한국건설기술연구원 하천.해안연구실) ;
  • 김성중 (한국건설기술연구원 하천.해안연구실)
  • Kang, Joon-Gu (River & Coast Research Division, Korea Institute of Construction Technology) ;
  • Yeo, Hong-Koo (River & Coast Research Division, Korea Institute of Construction Technology) ;
  • Kim, Sung-Jung (River & Coast Research Division, Korea Institute of Construction Technology)
  • 발행 : 2008.07.31

초록

본 연구는 변형수제 중 하나로서 "ㄱ" 모양을 갖는 L형 수제(L-type Groyne)에 대한 수리실험 연구이다. 연구 목적은 수제설계를 위한 기초자료인 수제주변(수로부, 수제역)의 흐름특성을 파악하는 것이다. 이를 위해 수리실험을 통하여 수제설계의 주요 수리특성인 주수로의 유속변화, 흐름중심선의 변화 및 흐름분리영역을 분석하였다. 본 연구에서 흐름중심선은 수로내의 최대유속이 발생되는 유선으로 정의하였으며 흐름분리영역은 본류영역인 주흐름과 수제영역인 재순환영역(recirculation zone)의 경계를 나타낸다. 5가지 수제 팔길이 조건에 대하여 유속을 변화시키면서 수리실험을 수행하였고, LSPIV(Large Scale Particle Image Velocimetry)기법을 적용하여 수제주변 흐름장을 측정 및 분석하였다. 실험결과 주흐름의 유속은 최대 1.5배 증가되는 것으로 나타났으며 수제 팔길이의 영향은 적었다. 흐름중심선의 폭은 수로폭의 $55{\sim}58%$ 구간으로 변화되었으며 흐름중심선과 흐름분리영역은 Froude 수에 큰 변화를 보이지 않는 것으로 나타났다.

The hydraulic model test for the L-type Groynes with "ㄱ" shape were conducted to analyze flow characteristics around these groynes. The results of model tests should be used for the fundamental information to design the L-type Groyne constructed in the field. Main hydraulic factors such as the velocity and thalweg line changes in main channel and separation area were analyzed in this study. The thalweg line is stream line where the maximum velocity occurs, and the separation area is a boundary of main flow and recirculation zone. Model tests with 5 different arm-lengths of the L-type Groynes were conducted changing the velocity. The LSPIV(Large Scale Particle Image Velocimetry) technique was used to measure and analyze the flow variation around the L-type Groynes. The velocity in main channel was increased 1.5 times and there was no effects of different groyne arm-length on the velocity changes. The width of thalweg lines $(T_{CL})$ was changed to $55{\sim}58%$ of chanel width, and the Froude number did not affect on the thalweg line $(T_{CL})$ and separation line $(S_h)$ changes.

키워드

참고문헌

  1. 한국건설기술연구원 (2004). “다기능 하천실험검증 사업”
  2. 강준구, 여홍구, 김성중 (2005). “단일 횡수제 조건에 따른 선단부 유속과 재순환 영역에 대한 실험 연구.” 한국수자원학회논문집, 한국수자원학회, 제38권 2호, pp. 143-153 https://doi.org/10.3741/JKWRA.2005.38.2.143
  3. 여홍구, 노영신, 강준구, 김성중 (2006). “단일수제설치에 따른 흐름중심선과 흐름분리영역의 변화.” 한국수자원학회논문집, 한국수자원학회, 제39권 4호, pp. 313-320 https://doi.org/10.3741/JKWRA.2006.39.4.313
  4. Ettema, R. and Muste, M. (2004). "Scale effects in flume experiments on flow around a spur dike in flatbed channel." Journal of Hydraulic Engineering, ASCE, Vol. 130, No. 7, pp. 635-646 https://doi.org/10.1061/(ASCE)0733-9429(2004)130:7(635)
  5. Fujita, I. et al., 1998. "Large-Scale Particle Image Velocimetry for Flow Analysis in Hydraulic Applications," Journal of Hydraulic Research, 36(3), 397-414 https://doi.org/10.1080/00221689809498626
  6. Lloyd, M.P. et al., 1995. "Unsteady surface-velocity field measurement using particle tracking velocimery," Journal of Hydraulic Research, 33(4), 519-534 https://doi.org/10.1080/00221689509498658
  7. Muste, M. et al. 2000. "Large-Scale Particle Image Velocimetry: a Reliable Tool for Physical Modeling," Proceedings of ASCE 2000 Joint Conference on Water Resources Engineering and Water Resources Planning & Management, Minneapolis, MN
  8. Melville, B.W., and Coleman, S. (2000). Bridge scour, Water Resources Publications, Littleton, Colo
  9. Francis, J.R., Pattanick, A., and Wearne, S. (1968). "Observations of flow patterns around some simplified groyne structures in channels" Technical Note No. 8, Proc., Inst. of Civil Engineers, London, England, Dec., pp. 829-846
  10. Rajaratnam, N., and Nwachukwu, B. (1983). "Flow near groyne-dike structures." Journal of Hydraulic Div., ASCE, Vol. 109, No. HY3, pp. 463-480 https://doi.org/10.1061/(ASCE)0733-9429(1983)109:3(463)
  11. Schmidt, J.C., Rutin, D.H., and Ikeda, H. (1993). "Flume simulation of recirculating flow computation near groyne." Water Resources Research, Vol. 29, No. 8, pp. 2925-2939 https://doi.org/10.1029/93WR00770
  12. Tingsanchali, T., and Maheswaran, S. (1990). "2D depth-averaged flow computation near groyne." Journal of Hydraulic Engineering, ASCE, Vol. 116, No. 1, pp. 71-86 https://doi.org/10.1061/(ASCE)0733-9429(1990)116:1(71)
  13. Uijttewaal, W. S. J. (2005) "Effects of Groyne Layout on the Flow in Groyne Fields: Laboratory Experiments." Journal of Hydraulic Engineering, ASCE, Vol. 131, No. 9, pp. 782-791 https://doi.org/10.1061/(ASCE)0733-9429(2005)131:9(782)

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