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Publication Type: search.filters.UBSTyp.KonferenzbeitragAuthor: search.filters.author.Kobus, HelmutAuthor: search.filters.author.Koschitzky, Hans-Peter

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Now showing 1 - 3 of 3
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    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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    VEGAS - Versuchseinrichtung zur Grundwasser- und Altlastensanierung
    (1993) Kobus, Helmut; Teutsch, Georg; Koschitzky, Hans-Peter; Cirpka, Olaf
    Die Versuchseinrichtung zur Grundwasser- und Altlastensanierung VEGAS, die derzeit an der Universität Stuttgart gebaut wird, wird aus einer Versuchshalle mit mehreren großmaßstäblichen Versuchsständen bestehen. Der Bau von VEGAS wird vom Bundesminister für Forschung und Technologie BMFT und vom Umweltministerium des Landes Baden-Württemberg im Rahmen des Projektes Wasser-Abfall-Boden PWAB finanziert und steht allen interessierten Forschungsnahmern aus der Bundesrepublik offen. VEGAS verfolgt im wesentlichen zwei Ziele: 1) Entwicklung und Optimierung von in-situ Sanierungsverfahren, 2) Prozeßforschung zum Schadstoffverhalten im Untergrund.
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    Hydraulics and design of spillway aerators for cavitation prevention in high speed flows
    (1988) Koschitzky, Hans-Peter; Kobus, Helmut
    The controlling factors for spillway aeration are discussed in view of their relevance to the design of aerators. The air entrainment results from the interaction of the water flow and the air flow in the supply system. An empirical two dimensional air entrainment function for various aerator geometries is presented. The subatmospheric pressure distribution in the aerator is calculated by an iterative method. The combination of both yields the total air entrainment rate. The air entrainment leads to an increase of the water flow velocity.