세척파를 이용한 하수관거 퇴적토의 침식비 해석
Erosion Ratio Analysis of Sewer Sediment Deposits Using Flushing Waves
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초록
본 연구에서는 세척파를 이용한 하수관거 퇴적토의 침식비를 해석하기 위하여 수치모의를 이용하였다. 고정상 수로에 형성되는 세척파의 진폭과 전파속도의 모의결과는 실험결과를 잘 재현하였으며, 세척파에 의한 하수관거 퇴적토의 침식 양상 또한 모의결과는 실험결과를 잘 재현하였다. 저류탱크의 초기저류수두를 높임에 따라 퇴적토의 침식비가 점차 증가하는 합리적인 모의결과를 얻을 수 있었다. 그리고 동일한 조건에서 수문의 개방고를 조절함으로써 퇴적토의 침식비를 높일 수 있었다. 즉, 세척파를 이용하여 하수관거 퇴적토를 효과적으로 제거하기 위해서는 저류탱크의 초기저류수두와 함께 주어진 조건에 적절한 수문 개방고를 결정하는 것이 중요하며, 이러한 해석에 수리실험과 함께 수치모의를적절히 활용할 수 있음을 보였다.
Abstract
The present study used numerical simulation to analyze the erosion ratio of sewer sedimentdeposits using flushing waves. The results of simulations of the amplitude and wave speed offlushing waves formed in fixed bed channels reproduced the experiment results, and the results ofsimulations of the erosion of sewer sediment deposits due to flushing waves likewise reproducedthe experiment results well. By raising the initial storage water head of the flushing tank, it waspossible to obtain rational simulation results where the erosion ratio of deposits increasedgradually. In addition, under identical conditions, it was possible to raise the erosion ratio ofdeposits by adjusting the opening height of gates. In other words, it is important to determine thegate opening height appropriate to the given conditions as well as the initial storage water head ofthe flushing tank to eliminate sewer sediment deposits by using flushing waves. The present studydemonstrated that numerical simulation could be appropriately used for such an analysis in additionto hydraulic experiments
참고문헌 (12)
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