Hydraulic Characteristics of a Drop Square Manhole with a Downstream Control Gate

摘要: AbstractManhole drops in drainage systems are often designed for providing energy dissipation, controlling high velocities and minimizing sewers structural damage. The flow is characterized by excessive air-entrainment turbulence. manhole geometry, the upstream downstream characteristics possible transitions between control inside manhole. This experimental research aims to investigate effects of a free jet square drop with gate analyzing conditions, discharge coefficients, turbulence downstream, dissipation three different regimes, R1, R2, R3. propose (1) adjust limits existing regimes classification including new impact number based on opening, (2) obtain empirical equations predicting coefficients regime. Non dimensional discharges were better predicted R1 using crit...