Numerical simulation of heat and mass transfer processes in the nozzle and expansion unit of the separator-steam-generator system in waste-heat utilization complex
Abstract
Homogeneous equilibrium and nonequilibrium (relaxation) models are used to simulate flash boiling flows in nozzles. The simulation were performed using the author's CFD-code ANES. Existing experimental data are used to test the realized mathematical model and the modified algorithms of ANES CFD-code. The results of test calculations are presented, together with data obtained for the nozzle and expansion unit of the steam generator and separator in the waste-heat system at ZAO NPVP Turbokon. The SIMPLE algorithm may be used for the transonic and supersonic flashing liquid flow. The relaxation model yields better agreement with experimental data regarding the distribution of void fraction along the nozzle axis. For the given class of flow, the difference between one- and two-dimensional models is slight.
- Publication:
-
Thermal Engineering
- Pub Date:
- December 2015
- DOI:
- 10.1134/S0040601515120010
- Bibcode:
- 2015ThEng..62..897A
- Keywords:
-
- computer simulation;
- supersonic nozzle;
- equilibrium model;
- nonequilibrium model;
- flash boiling flows;
- one-dimensional case;
- two-dimensional case;
- critical flow