Sage Journals: Discover world-class research

Abstract

Turbine blades deteriorate over operation and overall performance of turbine decreases due to dust entry, fuel impurities, chemical reactions with air impurities, sulphur in the fuel, incomplete combustion and unburned carbon production. In this article, the effects of blade surface roughness and geometry changes caused by operation conditions on turbine performance were numerically calculated. Numerical calculations were carried out for the fourth stage of an axial turbine which was experimentally tested in the Technical University of Hannover, Germany. Results showed a good agreement with the previous measurements. To find out the effect of blade deteriorations on turbine stage performance and flow field, blade deteriorations including blade surface roughness, tip clearance increment and fouling on vane and blade of turbine were applied in four different mass flow rates to the three-dimensional numerical model.

Keywords

Computational fluid dynamics in turbomachinery blade deteriorations turbine flow-field computational fluid dynamics analysis gas turbine performance blade roughness

Get full access to this article

View all access options for this article.

References

Tumer IY and Bajwa A. Learning about how aircraft engines work and fail. AIAA paper 99–2850, 1999.

Kurz

Brun

. Gas turbine tutorial maintenance and operating practices effects on degradation and life, San Antonio, TX: Southwest Research Institute, 2007.

Diakunchak IS. Performance deterioration in industrial gas turbines. In: International gas turbine and aero-engine congress and exposition, 3–6 June 1991, New York, USA.

Fiala A and Kugeler E. Roughness modelling for turbomachinery. In: ASME turbo expo 2011, Vancouver, BC, Canada, 6–10 June 2011.

Kang YS, Yoo J-C and Kang S-H. Numerical study of roughness effects on a turbine stage performance. In: ASME turbo expo 2004 on power for land, sea, and air, Vienna, Austria, 14–17 June 2004.

Bammert

Sandstede

. Measurements of the boundary layer development along a turbine blade with rough surface. ASME J Turbomach 1980; 102: 978–983.

Soltani

Birjandi

Seddighi Moorani

. Effects of surface contamination on the performance of a section of a wind turbine blade. Sci Iran 2011; 18: 349–357.

Vázquez R, Torre D, Partida F, et al. Influence of surface roughness on the profile and end-wall losses in low pressure turbines. In: ASME turbo expo 2011, Vancouver, BC, Canada, 6–10 June 2011.

Hamed

Tabakoff

. Erosion and deposition in turbomachinery. J Propul Power 2006; 22(2): 350–360.

10.

Ghenaiet

Tan

Elder

. Prediction of an axial turbomachine performance degradation due to sand ingestion. IMechE, Part A: J Power Energy 2005; 219: 273–287.

11.

Lakshminarayana

. Fluid dynamics and heat transfer of turbomachinery, New York, NY: Wiley, 1996.

12.

Cohen

. Rogers GFC and Saravanamuttoo HIH. Gas turbine theory, 3rd ed. New York, NY: Wiley, 1987.

13.

Groschup

. Strömungstechnische Untersuchungeiner Turbinenstufeim Vergleichzum Verhalten der ebenen Gitterihrer Beschaufelung, Hanover: University of Hanover, 1977.

14.

White

. Viscous fluid flow, McGraw-Hill Education, 2005.

15.

Montis M, Niehuis N and Fiala A. Effect of surface roughness on loss behaviour, aerodynamic loading and boundary layer development of a low-pressure gas turbine airfoil. In: ASME turbo expo 2010, Glasgow, UK, 14–18 June 2010.

16.

Ivanov S. A numerical simulation of particle laden flow through airfoil cascade. In: International conference on computer systems and technologies, Vienna, Austria, 2005.

17.

Yun Y, Park Y and Song SJ. Performance degradation due to blade surface roughness in a single-stage axial turbine. In: ASME turbo expo 2004, power for land, sea, and air, Vienna, Austria, 14–17 June 2004.

18.

Acharya

Mahmood

. The gas turbine handbook, Section 4.3- Turbine blade aerodynamics, US department of Energy, 2006.

19.

Basson

Lakshminarayana

. Numerical simulation of tip clearance effects in turbomachinary. J Turbomach 1995; 117: 348–359.

20.

Osvaldo M and Zuñiga V. Analysis of gas turbine compressor fouling and washing on line. PhD Thesis, Cranfield University, UK, 2007.

Numerical study of blade deterioration effects on an industrial gas turbine stage performance and flow field

Abstract

Keywords

Get full access to this article

References