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Errors in the basic diaphragm discharge coefficients

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Measurement Techniques Aims and scope

Summary

  1. 1.

    The values of the diaphragm discharge coefficients which have moduli between 0.4 and 0.6 and are adopted in the national standards are higher than the corresponding experimentally obtained values. The mean-square error of the mean value of the basic diaphragm discharge coefficient in the range of 0.35 to 0.8 moduli varies between 0.05 and 0.12%, and the mean-square error of a series of measurements varies between 0.23 to 0.59%

  2. 2.

    The investigation of discharge coefficients of restricting devices in precision discharge-meters by means of modern method of experimental data analysis remains a pressing problem.

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Literature cited

  1. Rules 27–54 on the use and checking of discharge meters with normal diaphragms, jets, and venturi tubes [In Russian] (Mashgiz, 1955).

  2. DIN 1952. VDI-Durchflussmessregeln, VI. Ausgabe (1948).

  3. R. Witte, Techn. Mechan. und Thermodynamik, 1, No. 1 (1930).

  4. R. Witte, Forsch. Gebiete der Ingenieurwes. 5, No. 5 (1934).

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  10. R. Witte, VDI-Z, 88, No. 3/4 (1944).

  11. A. Jorissen, Trans. ASME, No. 7 (1953).

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  15. R. Rousselet, Mesures et contrôle industriel, Nos. 137, 138 (1948).

  16. Regeln fur die Durchflussmessung mit Dusen und Blenden. Vorlaufige Empfehlungen. ISA Bulletin 9, (1935); ISA Bulletin 12 (1936).

  17. Ya. M. Rubinshtein, Norms (rules) for measuring discharges of liquids, gas, and vapor by means of throttle instruments (Project) [In Russian] (Gosénergoizdat, 1933).

  18. Rule No. 169 on measuring the discharge of liquids, gas, and vapor by means of jets and diaphragms, and general instructions for Rule No. 169 [In Russian] (Katalogizdat, NKM, 1938).

  19. S. S. Kivilis, “Reynolds limiting numbers in discharge-measuring constriction devices.” Proc. All-Union Sci. Research Institute of the Committee of Standards, Measures, and Measuring Instruments [In Russian] issue 4. (Standartgiz, in press).

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Authors
  1. S. S. Kivilis
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Kivilis, S.S. Errors in the basic diaphragm discharge coefficients. Meas Tech 2, 646–649 (1959). https://doi.org/10.1007/BF00977283

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  • DOI: https://doi.org/10.1007/BF00977283

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