Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2008.11b
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- Pages.2682-2687
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- 2008
Study on the unsteady characteristics of depressurized drainage system
부압을 이용한 배수시스템의 비정상상태 유동특성해석
Abstract
Depressurized drainage systems have been used for more than 30 years and are becoming a common part of urban drainage infrastructures. The hydraulic principles governing the operation of the depressurized drainage systems were studied in this paper and particularly, focused on the analysis of unsteady characteristics of the two-phase flow. A definition of the filling ratio was outlined and types of flow pattern were classified according to the filling ratio. Experiments were conducted to investigate the main features of pressure fluctuation. All results were found to depend on the filling ratio of the upstream pipe flow as well as the upstream Froude number.