비평형 습증기 모델을 적용한 증기 응축 유동 해석

다국어 초록 (Multilingual Abstract)

When the steam is used as working fluid in fluid machinery, different from other gases as air, phase transition (steam condensation) can occur and it affects not only the flow fields, but also machine performance & efficiency. Therefore, considering phase transition phenomena in CFD calculation is required to achieve accurate prediction of steam flow and non-equilibrium wet-steam model is needed to simulate realistic steam condensing flow. In this research, non-equilibrium wet-steam model is implemented on in-house code(T-Flow), the flow fields including phase transition phenomena in convergent-divergent nozzle are studied and compared to results of advance researches.

참고문헌 (Reference)

1 박준영, "천음속 회전익에서의 누설유동" 대한기계학회 27 (27): 12-94, 2003

2 최민석, "입구 경계층 두께가 축류 압축기 내부 유동에 미치는 영향 (II)" 대한기계학회 29 (29): 956-962, 2005

3 Simpson, D. A., "Viscous and unsteady flow calculations of condensing steam in nozzles" 26 : 71-79, 2005

4 Grubel, M., "Two-phase flow modeling and measurements in low-pressure turbines - part 2: turbine wetness measurement and comparison to cfd-predictions" GT2014-GT25245, 2014

5 Grubel, M., "Two-phase flow modeling and measurements in low-pressure turbines - part 1: numerical validation of wet steam models and turbine modeling" GT2014-GT25244, 2014

6 Moore, M. J., "Two-phase Steam Flow in Turbines and Separators: Theory, Instrumentation, Engineering" Hemisphere Publishing Corporation 1976

7 Halama, J., "Transonic flow of wet steam-numerical simulation" 52 (52): 2012

8 Rajadurai, J. S., "Thermodynamics and Thermal Engineering" New Age International Publishers 2003

9 Park, J. Y., "Theree-Dimensional Flow Analysis under Stator/Rotor Interaction in One-Stage Turbine Using the Parralel Programming Method" 1500-1505, 2002

10 Dykas, S., "Single-and two-fluid models for steam condensing flow modeling" 37 (37): 1245-1253, 2011

11 Moore, M. J., "Predicting the fog-drop size in wet-steam turbines" Institute of Mechanical Engineers 1973

12 Halama, J., "Numerical simulation of transonic flow of wet steam in nozzles and turbines" 95 (95): S303-S318, 2013

13 Chandler, K., "Non-equilibrium wet-steam calculations of unsteady low-pressure turbine flows" 1-10, 2013

14 Gerber, A. G., "Inhomogeneous multifluid model for prediction of nonequilibrium phase transition and droplet dynamics" 130 (130): 1-10, 2008

15 Baek, J. H., "Effects of the Inlet Boundary Layer on the Flow in an Axial Compressor" 10 (10): 83-88, 2007

16 "ANSYS FLUENT 14.0 Theory Guide"

17 박종일, "1.5단 축류터빈에서의 Clocking 효과에 관한 수치적 연구" 한국전산유체공학회 11 (11): 1-8, 2006