In the present paper, a numerical model for the simulation of wet-steam flows has been developed and implemented within a commercial CFD code (ANSYS Fluent) via user defined functions. The scheme is based on a single-fluid approach and solves the transport equations for a homogeneous mixture coupled with conservation equations for the droplets number and liquid volume fraction. The model is validated against a steam nozzle test-case and then compared with experimental data from a steam ejector with a significant amount of generated liquid phase. The simulations show a good agreement both in terms of mass flow rates and pressure profile data. Some of the modeling assumptions are also reviewed and discussed.

CFD modeling of condensing steam ejectors: Comparison with an experimental test-case / Mazzelli, Federico*; Giacomelli, Francesco; Milazzo, Adriano. - In: INTERNATIONAL JOURNAL OF THERMAL SCIENCES. - ISSN 1290-0729. - ELETTRONICO. - 127:(2018), pp. 7-18. [10.1016/j.ijthermalsci.2018.01.012]

CFD modeling of condensing steam ejectors: Comparison with an experimental test-case

Mazzelli, Federico
;
Giacomelli, Francesco;Milazzo, Adriano
2018

Abstract

In the present paper, a numerical model for the simulation of wet-steam flows has been developed and implemented within a commercial CFD code (ANSYS Fluent) via user defined functions. The scheme is based on a single-fluid approach and solves the transport equations for a homogeneous mixture coupled with conservation equations for the droplets number and liquid volume fraction. The model is validated against a steam nozzle test-case and then compared with experimental data from a steam ejector with a significant amount of generated liquid phase. The simulations show a good agreement both in terms of mass flow rates and pressure profile data. Some of the modeling assumptions are also reviewed and discussed.
2018
127
7
18
Goal 7: Affordable and clean energy
Mazzelli, Federico*; Giacomelli, Francesco; Milazzo, Adriano
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1122145
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