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Paper Information

Journal:   JOURNAL OF APPLIED FLUID MECHANICS (JAFM)   2016 , Volume 9 , Number 4; Page(s) 1627 To 1639.
 
Paper: 

EFFECTS OF NON-EQUILIBRIUM CONDENSATION ON DEVIATION ANGLE AND PERFORMANCE LOSSES IN WET STEAM TURBINES

 
 
Author(s):  BAGHERI ESFE H., KERMANI M.J.*, SAFFAR AVVAL M.
 
* DEPARTMENT OF MECHANICAL ENGINEERING, AMIRKABIR UNIVERSITY OF TECHNOLOGY (TEHRAN POLYTECHNIC), TEHRAN, IRAN, P. CODE 15875- 4413
 
Abstract: 

In this paper, effects of non-equilibrium condensation on deviation angle and performance losses of wet stages of steam turbines are investigated. The AUSM-van Leer hybrid scheme is used to solve the two-phase turbulent transonic steam flow around a turbine rotor tip section. The dominant solver of the computational domain is the non-diffusive AUSM scheme (1993), while a smooth transition from AUSM in regions withlarge gradients (e.g. in and around condensation- and aerodynamic-shocks) to the diffusive scheme by van Leer (1979) guarantees a robust hybrid scheme throughout the domain. The steam is assumed to obey nonequilibrium thermodynamic model, in which abrupt formation of liquid droplets produces a condensation shock. To validate the results, the experimental data by Bakhtaret al. (1995) has been used. It is observed that as a result of condensation, the aerothermodymics of the flow field changes. For example for supersonic wet case with back pressurePb=30 kPa, the deviation angle and total pressure loss coefficient change by 65% and 200%, respectively, with respect to that in dry case.

 
Keyword(s): CONDENSATION SHOCK, DEVIATION ANGLE, PERFORMANCE LOSS, STEAM TURBINE
 
 
References: 
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+ Click to Cite.
APA: Copy

BAGHERI ESFE, H., & KERMANI, M., & SAFFAR AVVAL, M. (2016). EFFECTS OF NON-EQUILIBRIUM CONDENSATION ON DEVIATION ANGLE AND PERFORMANCE LOSSES IN WET STEAM TURBINES. JOURNAL OF APPLIED FLUID MECHANICS (JAFM), 9(4), 1627-1639. https://www.sid.ir/en/journal/ViewPaper.aspx?id=570839



Vancouver: Copy

BAGHERI ESFE H., KERMANI M.J., SAFFAR AVVAL M.. EFFECTS OF NON-EQUILIBRIUM CONDENSATION ON DEVIATION ANGLE AND PERFORMANCE LOSSES IN WET STEAM TURBINES. JOURNAL OF APPLIED FLUID MECHANICS (JAFM). 2016 [cited 2021August04];9(4):1627-1639. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=570839



IEEE: Copy

BAGHERI ESFE, H., KERMANI, M., SAFFAR AVVAL, M., 2016. EFFECTS OF NON-EQUILIBRIUM CONDENSATION ON DEVIATION ANGLE AND PERFORMANCE LOSSES IN WET STEAM TURBINES. JOURNAL OF APPLIED FLUID MECHANICS (JAFM), [online] 9(4), pp.1627-1639. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=570839.



 
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