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1979 - 197911980 - 19842

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Publication Type: search.filters.UBSTyp.KonferenzbeitragInstitute: search.filters.UBSInstitut.Institut für Wasser- und UmweltsystemmodellierungAuthor: search.filters.author.Westrich, Bernhard

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Now showing 1 - 3 of 3
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    An example of a combined discharge-control and aeration structure
    (1983) Kobus, Helmut; Westrich, Bernhard
    The design of a hydraulic structure in a cooling water circuit is described which serves the dual purpose of controlling the water levels in the system upstream and of providing a maximum oxygen uptake without discharging large amounts of air into the subsequent pressure duct in order to avoid blow-out problems.
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    ItemOpen Access
    Effects of model configuration, flow conditions and scale in modelling spillway aeration grooves
    (1984) Koschitzky, Hans-Peter; Westrich, Bernhard; Kobus, Helmut
    The hydraulic design of spillways, with high specific discharge usually requires model investigations. Whereas standard small-scale models are sufficient for the assessment of the general flow pattern, studies on cavitation control by means of aeration have to be conducted in detail models at considerably larger scales. Detail models of aeration grooves are studied in order to optimize the geometry and to determine the air entrainment of the grooves. The large model scale necessitates the use of models which represents only a small fraction of the width and length of the spillway. Such sectional models allow only an investigation of a single aeration groove in a given approach flow. This paper presents a hydraulic model study of the spillway of Laiban Dam on the Philippines, which is part of the Manila Water Supply Project III.
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    ItemOpen Access
    Hydraulic design considerations for cooling tower collector basins
    (1979) Kobus, Helmut; Westrich, Bernhard
    Conventional collector basins of natural draft cooling towers have a tendency towards rapid sedimentation. In order to avoid this problem, a shallow type of basin with a system of draining canals is developped. Numerical calculations supplemented by hydraulic model tests yield depths, velocities and energy losses in the system. Prototype measurements are shown to be in good agreement with numerical and experimental predictions for all modes of operation.