한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제41권7호
  • /
  • Pages.669-679
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  • 2008
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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댐 붕괴흐름의 해석해(Ritter의 해)를 이용한 월파유속 분석

Analyses of Overtopping Velocity using Analytical Solution(Ritter's Solution) of Dam-Break Flow

  • 유용욱 (한국건설기술연구원 하천.해안연구실) ;
  • 이종인 (한국건설기술연구원 하천.해안연구실) ;
  • 김영택 (한국건설기술연구원 하천.해안연구실)
  • Ryu, Yong-Uk (River and Coast Research Division, Korea Institute of Construction Technology) ;
  • Lee, Jong-In (River and Coast Research Division, Korea Institute of Construction Technology) ;
  • Kim, Young-Taek (River and Coast Research Division, Korea Institute of Construction Technology)
  • 발행 : 2008.07.31
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초록

본 연구는 수리실험으로 얻어진 권파에 의한 월파수괴의 유속을 댐붕괴흐름과 비교하여 거동의 유사성을 검토하였다. 댐붕괴흐름은 해석해가 간략하고 월파 거동과 유사함으로 인해 월파의 유속산정에 이용되어왔다. 월파는 일반적으로 많은 연행기포로 인해 기존의 유속측정기법을 적용하는데 제한을 받게 되므로, 본 실험에서는 기포나 기포조직모양을 이용한 기포영상유속계를 이용하여 월파 유속을 측정하였다. 실험결과로부터 월파의 유속단면을 검토하였고, 단면의 최대유속과 수심평균유속을 댐붕괴흐름의 1차원 해석해인 Ritter의 해와 비교하였다. 해석해와의 비교를 위해 댐붕괴 전 초기수심을 파랑조건과 월파의 측정값으로부터 유도하였다. 파랑조건으로부터 추정된 붕괴 전 초기 수심을 이용한 해석해는 측정된 유속의 분포형태에 있어서는 차이를 보였으나, 월파수괴의 전면속도로부터 산정된 초기수심을 이용한 해석해는 유속크기의 비교에서 좋은 일치를 보였다.

The present study examines similarity of behavior between an overtopping wave generated by a plunging wave and a dam-break flow through hydraulic model tests. The dam-break flow has been employed to estimate the overtopping effect on the basis of the dam-break flow's behavior similar to the overtopping. In this study, the overtopping velocity was measured by a modified image technique using bubble and bubble texture images called bubble image velocitmetry. From the measurements, the vertical profiles of horizontal overtopping velocity at cross-sections along the deck were presented and discussed. Maximum velocity and depth-averaged velocity at each cross-section were compared with an analytical solution solving the dam-break flow, Ritter's solution. The initial water depth of importance for the solution was determined from the tested wave condition and the overtopping measurements. The comparison shows that the solution with the initial water depth estimated using the front velocity of the overtopping wave is in good agreements with the measurements.

키워드

참고문헌

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