Abstract
This paper presents the results of research on the wet steam flow with spontaneous condensation in the de Laval nozzle. A comparison is made between the results of numerical modelling performed for two cases of boundary conditions obtained using an in-house CFD code and the Ansys CFX commercial package. The numerical modelling results are compared to the results of experimental testing carried out on an in-house laboratory steam tunnel. The differences between the numerical results produced by the two codes in terms of place and intensity of condensations of steam to water point to the difficulty in correct modelling of this type of flows and emphasize the need for further studies in this field.
Highlights
The wet steam flow field in convergent-divergent nozzles has been analysed continuously by many researchers since the early 1960’s
The earliest examples of experimental testing of steam condensing flows in the de Laval nozzle are described in the works published by Barschdorff [3, 4], Barschdorff and Filippov [5], Moses and Stein [6] or Puzyrewski and Król [7, 8]
Numerical modelling was carried out using an in-house Computational Fluid Dynamics (CFD) code and the commercial Ansys CFX program
Summary
The wet steam flow field in convergent-divergent (de Laval) nozzles has been analysed continuously by many researchers since the early 1960’s. Heat Mass Transfer (2018) 54:2675–2681 the wet steam condensation phenomenon in transonic flows and develop computational models offering an unequivocal flow field solution, regardless of the applied CFD numerical code. Revealing essential differences in the results of the flow field modelling carried out for wet steam flows with spontaneous condensation and performed by means of various numerical codes and models, both academic and commercial, the project proved that it was justified to continue works in this particular research area. It emphasized the need for collaboration between scientific centres to develop more reliable methods and numerical models
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