Discharge Measurements by Means of Venturi Tubes

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Abstract
An attempt is made to present a comprehensive idea of the actual stage of development of the method of flow measurement by means of Venturi tubes. Use has been made here of (a) the latest available American and European Standards, published by the various national associations: The American Society of Mechanical Engineers, 1937; Ente nazionale per l’Unificazione nell’ Industria, 1938; British Standards Institution, 1943; Verein deutscher Ingenieure, 1948; Association francaise de Normalisation, 1949. (b) The decisions taken at the international meetings of the Committees on Flow Measurement: ISA 30, Helsinki, 1939; ISO 30, Paris, 1948. (c) Published research reports. Both the nozzle-type and the Herschel-type Venturi are discussed from the viewpoints of discharge coefficient and pressure losses. The conclusions point out the need of further research and the necessity of an international standardization.

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