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Investigation on Hydraulic Characteristics of Turbine-Type Manhole Cover

Department of Hydraulic Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Pezzinga
Water 2021, 13(11), 1530; https://doi.org/10.3390/w13111530
Received: 19 April 2021 / Revised: 26 May 2021 / Accepted: 26 May 2021 / Published: 29 May 2021
(This article belongs to the Section Hydraulics and Hydrodynamics)
Manhole cover is an important device of urban drainage infrastructures. The hydraulic characteristics of turbine-type manhole covers were studied through numerical simulations and physical experiments. The flow field characteristics and water surface were investigated. The drainage process is divided into two parts: free flow regime and submerged flow regime. Numerical and experimental results are in good agreement. It is indicated that the depth of water is constant in the later stage of unstable free drainage, while it changes with time and determines the discharge under the subsequent unstable submerged drainage condition. The influence of the depth on discharge is mainly reflected in the submerged drainage stage, in which period the discharge is linearly related to the square root of the depth. While in free flow regime, the discharge is affected by volume fraction of water with second order. The correlation between the depth and the discharge in the process of submerged flow is proposed based on dimensional harmony principle. With the characteristic of massive discharge, the design of turbine-type manhole cover provides one more choice in urban drainage construction. View Full-Text
Keywords: manhole cover; flow capacity; VOF model; physical experiment; numerical simulation manhole cover; flow capacity; VOF model; physical experiment; numerical simulation
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MDPI and ACS Style

Fan, L.; Zhan, H.; Zhang, B.; Bao, Z.; Wan, W. Investigation on Hydraulic Characteristics of Turbine-Type Manhole Cover. Water 2021, 13, 1530. https://doi.org/10.3390/w13111530

AMA Style

Fan L, Zhan H, Zhang B, Bao Z, Wan W. Investigation on Hydraulic Characteristics of Turbine-Type Manhole Cover. Water. 2021; 13(11):1530. https://doi.org/10.3390/w13111530

Chicago/Turabian Style

Fan, Leilei, Hang Zhan, Boran Zhang, Zhiren Bao, and Wuyi Wan. 2021. "Investigation on Hydraulic Characteristics of Turbine-Type Manhole Cover" Water 13, no. 11: 1530. https://doi.org/10.3390/w13111530

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