Enhancing low-pressure stage steam turbine using the TDLD criterion and the TOPSIS analysis-Reference-Cited by-同舟云学术

Enhancing low-pressure stage steam turbine using the TDLD criterion and the TOPSIS analysis

Published:2023-11-14 Issue: Volume: Page:
ISSN:0954-4062
Container-title:Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
language:en
Short-container-title:Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

Author:

Dolatabadi Reza¹,Lakzian Esmail¹²^ORCID,Masoumi Samaneh¹,Dykas Sławomir³,Karimi Nader⁴,Benkhaldoun Fayssal⁵,Vlaskin Mikhail S⁶

Affiliation:

1. Department of Mechanical Engineering, Center of Computational Energy, Hakim Sabzevari University, Sabzevar, Iran

2. Department of Mechanical Engineering, Andong National University, Andong, South Korea

3. Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Gliwice, Poland

4. School of Engineering and Materials Science, Queen Mary University of London, London, UK

5. LAGA, Sorbonne Paris Cité, Université Sorbonne Paris Nord, UMR 7539 Villetaneuse, France

6. Joint Institute for High Temperatures of the Russian Academy of Sciences, Moscow, Russia

Abstract

The liquid phase in the wet steam flow causes thermodynamics losses and affects steam turbine blade durability. The main objective of the present research is the design of the rotor stagger angle and different operating conditions in the low-pressure stage of the steam turbine. A two-phase Eulerian-Eulerian model and the SST k − ω model are used to simulate the viscous wet steam flow inside the steam turbine stage. Frozen rotor methodology is employed for modeling the stator-rotor interaction. The effects of different rotor stagger angles and different outlet pressure levels on the wet steam flow parameters are studied to introduce an improved case. The turbine stage efficiency, droplet average radius, liquid mass fraction, and degree of reaction (TDLD) are considered as design criteria. The search for the improved value of pressure ratio and rotor stagger angle is performed using the TDLD criterion by TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution). The improved case is selected with a rotor stagger angle of 64 degrees and outlet pressure of 6.5 kPa, at which the turbine stage efficiency (TSE) is increased by 21.3% compared to [Formula: see text]. Also, the liquid mass fraction (LMF) and the degree of reaction (DOR) reduced by 39.53 and 26% relative to [Formula: see text], and [Formula: see text], respectively. In addition, droplet average radius (DAR) increases by 26.14% compared to [Formula: see text].

Publisher

SAGE Publications

Subject

Mechanical Engineering

Link

http://journals.sagepub.com/doi/pdf/10.1177/09544062231211144

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