Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of manhole molds and inlet alignment on the hydraulics of circular manhole at changing surcharge
Head loss coefficient of a manhole is dependent on various hydraulic and structural characteristics. This study analyses the effect on manhole head loss coefficients using numerical VOF model due to three factors: manhole structural mold shapes, small changes in inlet orientations and changes in the manhole to inlet pipe ratios. Head loss coefficients showed a strong dependence on the available surcharge. Presence of sump created the maximum head loss while benching provided the best efficiency. Within small deviation of inlet pipe orientations, two different hydraulic regimes were observed indicating effects on both head loss coefficients and threshold surcharge heights. Change of manhole to inlet pipe diameter ratios (Φm/Φp) showed three head loss characteristics. Head loss in small manholes (Φm/Φp<3) did not change with surcharge. Medium manholes (3 < Φm/Φp< 4.0) showed high head losses up to a specific surcharge. Big manholes (Φm/Φp>4.5) showed a high head loss at all the surcharges.
Effect of manhole molds and inlet alignment on the hydraulics of circular manhole at changing surcharge
Head loss coefficient of a manhole is dependent on various hydraulic and structural characteristics. This study analyses the effect on manhole head loss coefficients using numerical VOF model due to three factors: manhole structural mold shapes, small changes in inlet orientations and changes in the manhole to inlet pipe ratios. Head loss coefficients showed a strong dependence on the available surcharge. Presence of sump created the maximum head loss while benching provided the best efficiency. Within small deviation of inlet pipe orientations, two different hydraulic regimes were observed indicating effects on both head loss coefficients and threshold surcharge heights. Change of manhole to inlet pipe diameter ratios (Φm/Φp) showed three head loss characteristics. Head loss in small manholes (Φm/Φp<3) did not change with surcharge. Medium manholes (3 < Φm/Φp< 4.0) showed high head losses up to a specific surcharge. Big manholes (Φm/Φp>4.5) showed a high head loss at all the surcharges.
Effect of manhole molds and inlet alignment on the hydraulics of circular manhole at changing surcharge
Beg, Md Nazmul Azim (Autor:in) / Carvalho, Rita F. (Autor:in) / Leandro, Jorge (Autor:in)
Urban Water Journal ; 16 ; 33-44
02.01.2019
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
CFD , head loss coefficient , manholes , OpenFOAM® , urban drainage , VOF
MANHOLE OPENING FRAME, MANHOLE STRUCTURE, AND MANHOLE OPENING STRUCTURE
| Europäisches Patentamt | 2018
RAISING MEMBER OF MANHOLE, RAISING METHOD OF MANHOLE AND MANHOLE
| Europäisches Patentamt | 2018