Development of a numerical based correlation for performance losses due to surface roughness in axial turbines

S. A. Moshizi; M. H. Nakhaei; M. J. Kermani; A. Madadi

doi:10.1017/jmech.2014.10

Development of a numerical based correlation for performance losses due to surface roughness in axial turbines

S. A. Moshizi^*, M. H. Nakhaei, M. J. Kermani, A. Madadi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In the present work, a recently developed in-house 2D CFD code is used to study the effect of gas turbine stator blade roughness on various performance parameters of a two-dimensional blade cascade. The 2D CFD model is based on a high resolution flux difference splitting scheme of Roe (1981). The Reynolds Averaged Navier-Stokes (RANS) equations are closed using the zero-equation turbulence model of Baldwin-Lomax (1978) and two-equation Shear Stress Transport (SST) turbulence model. For the smooth blade, results are compared with experimental data to validate the model. Finally, a correlation between roughness Reynolds number and loss coefficient for both turbulence models is presented and tested for three other roughness heights. The results of 2D turbine blade cascades can be used for one-dimensional models such as mean line analysis or quasi-three-dimensional models e.g. streamline curvature method.

Original language	English
Pages (from-to)	631-642
Number of pages	12
Journal	Journal of Mechanics
Volume	30
Issue number	6
DOIs	https://doi.org/10.1017/jmech.2014.10
Publication status	Published - Dec 2014
Externally published	Yes

Keywords

Surface roughness
Gas turbine cascade
Roe scheme
Shear stress transport
Baldwin-Lomax model

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10.1017/jmech.2014.10

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title = "Development of a numerical based correlation for performance losses due to surface roughness in axial turbines",

abstract = "In the present work, a recently developed in-house 2D CFD code is used to study the effect of gas turbine stator blade roughness on various performance parameters of a two-dimensional blade cascade. The 2D CFD model is based on a high resolution flux difference splitting scheme of Roe (1981). The Reynolds Averaged Navier-Stokes (RANS) equations are closed using the zero-equation turbulence model of Baldwin-Lomax (1978) and two-equation Shear Stress Transport (SST) turbulence model. For the smooth blade, results are compared with experimental data to validate the model. Finally, a correlation between roughness Reynolds number and loss coefficient for both turbulence models is presented and tested for three other roughness heights. The results of 2D turbine blade cascades can be used for one-dimensional models such as mean line analysis or quasi-three-dimensional models e.g. streamline curvature method.",

keywords = "Surface roughness, Gas turbine cascade, Roe scheme, Shear stress transport, Baldwin-Lomax model",

author = "Moshizi, {S. A.} and Nakhaei, {M. H.} and Kermani, {M. J.} and A. Madadi",

year = "2014",

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doi = "10.1017/jmech.2014.10",

language = "English",

volume = "30",

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journal = "Journal of Mechanics",

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TY - JOUR

T1 - Development of a numerical based correlation for performance losses due to surface roughness in axial turbines

AU - Moshizi, S. A.

AU - Nakhaei, M. H.

AU - Kermani, M. J.

AU - Madadi, A.

PY - 2014/12

Y1 - 2014/12

N2 - In the present work, a recently developed in-house 2D CFD code is used to study the effect of gas turbine stator blade roughness on various performance parameters of a two-dimensional blade cascade. The 2D CFD model is based on a high resolution flux difference splitting scheme of Roe (1981). The Reynolds Averaged Navier-Stokes (RANS) equations are closed using the zero-equation turbulence model of Baldwin-Lomax (1978) and two-equation Shear Stress Transport (SST) turbulence model. For the smooth blade, results are compared with experimental data to validate the model. Finally, a correlation between roughness Reynolds number and loss coefficient for both turbulence models is presented and tested for three other roughness heights. The results of 2D turbine blade cascades can be used for one-dimensional models such as mean line analysis or quasi-three-dimensional models e.g. streamline curvature method.

AB - In the present work, a recently developed in-house 2D CFD code is used to study the effect of gas turbine stator blade roughness on various performance parameters of a two-dimensional blade cascade. The 2D CFD model is based on a high resolution flux difference splitting scheme of Roe (1981). The Reynolds Averaged Navier-Stokes (RANS) equations are closed using the zero-equation turbulence model of Baldwin-Lomax (1978) and two-equation Shear Stress Transport (SST) turbulence model. For the smooth blade, results are compared with experimental data to validate the model. Finally, a correlation between roughness Reynolds number and loss coefficient for both turbulence models is presented and tested for three other roughness heights. The results of 2D turbine blade cascades can be used for one-dimensional models such as mean line analysis or quasi-three-dimensional models e.g. streamline curvature method.

KW - Surface roughness

KW - Gas turbine cascade

KW - Roe scheme

KW - Shear stress transport

KW - Baldwin-Lomax model

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DO - 10.1017/jmech.2014.10

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SP - 631

EP - 642

JO - Journal of Mechanics

JF - Journal of Mechanics

IS - 6

ER -

Development of a numerical based correlation for performance losses due to surface roughness in axial turbines

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Keywords

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