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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

A MODEL FOR TWO-PHASE CRITICAL FLOWS USING LENGTH TO DIAMETER RATIO AND FLOW REGIME AS EXPLICIT VARIABLES

Get access (open in a dialog) DOI: 10.1615/IHTC7.4710
pages 385-390

要約

A model is developed that is useful in predicting from stagnation conditions alone the adiabatic, one-component, two-phase, critical mass flow rate of fluids in circular tubes of length to diameter ratio greater than 8. This model emphasizes the flow regimes that are present and the phenomenological correctness of the model is demonstrated by using two other tests as well: first the prediction of critical mass flow rate for a given critical pressure and stagnation enthalpy and secondly, the prediction of the pressure profile in the long tube. Charts of the critical mass flow rate versus stagnation pressure with stagnation temperature as the second independent variable are obtained using the model. Separate charts are drawn for each fluid, pipe L/D ratio and shape of entrance. The agreement of the model for predictions of critical mass flow rate experimental data of five different investigators is for most part within ± 10%.