Surface Roughness Effects on Turbine Blade Aerodynamics

Hummel, Frank; Lötzerich, Michael; Cardamone, Pasquale; Fottner, Leonhard

doi:10.1115/1.1860377

Cited by 49 publications

(16 citation statements)

References 5 publications

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“…In the study of El-Batsh and Haselbacher [4], an increase in the total pressure loss coefficient of about 0.03 was observed only after 36 hours of working of turbine blades in a cascade due to fouling of ash particles suspended in the inlet air. Hummel et al [5] studied the aerodynamic performance of a turbine blade through measurements of total pressure loss on a linear cascade. In this study, the Reynolds number was chosen between 0.6  10 6 and 1.2  10 6 to capture the operating condition for heavy-duty gas turbines.…”

Section: Experimental Workmentioning

confidence: 99%

Development of a Numerical Based Correlation for Performance Losses due to Surface Roughness in Axial Turbines

et al. 2014

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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.

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Section: Experimental Workmentioning

confidence: 99%

Development of a Numerical Based Correlation for Performance Losses due to Surface Roughness in Axial Turbines

et al. 2014

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“…Third, an experimental test was presented by Hummel et al [28] to evaluate the aerodynamic performance of a rough blade surface. Four different heights of surface roughness were added for a Reynolds number range from 60 × 10 4 to 120 × 10 4 .…”

Section: Experimental Studies On the Effect Of Wind Turbine Blade Surmentioning

confidence: 99%

On the role of surface roughness in the aerodynamic performance and energy conversion of horizontal wind turbine blades: a review

Zidane

Saqr

Swadener

et al. 2016

Int. J. Energy Res.

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Summary Renewable energy is one of the main pillars of sustainable development, especially in developing economies. Increasing energy demand and the limitation of fossil fuel reserves make the use of renewable energy essential for sustainable development. Wind energy is considered to be one of the most important resources of renewable energy. In North African countries, such as Egypt, wind energy has an enormous potential; however, it faces quite a number of technical challenges related to the performance of wind turbines in the Saharan environment. Seasonal sand storms affect the performance of wind turbines in many ways, one of which is increasing the wind turbine aerodynamic resistance through the increase of blade surface roughness. The power loss because of blade surface deterioration is significant in wind turbines. The surface roughness of wind turbine blades deteriorates because of several environmental conditions such as ice or sand. This paper is the first review on the topic of surface roughness effects on the performance of horizontal‐axis wind turbines. The review covers the numerical simulation and experimental studies as well as discussing the present research trends to develop a roadmap for better understanding and improvement of wind turbine performance in deleterious environments. Copyright © 2016 John Wiley & Sons, Ltd.

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“…A high roughness of the blade surface leads to earlier boundary layer transition [6], increase in friction factor [7], decrease in heat transfer efficiency [8] and total pressure [9]. Boynton, et al [10] reported that smooth blades yield a turbine efficiency of 87.92%.Compared with rough blades, this was a 2.5% improvement of the efficiency, which reduced the turbine inlet temperature by 32 K and increased turbine durability.…”

Section: Introductionmentioning

confidence: 97%

Machining the Integral Impeller and Blisk of Aero-Engines: A Review of Surface Finishing and Strengthening Technologies

Gao

Wang

et al. 2017

Chin. J. Mech. Eng.

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The integral impeller and blisk of an aero-engine are high performance parts with complex structure and made of difficult-to-cut materials. The blade surfaces of the integral impeller and blisk are functional surfaces for power transmission, and their surface integrity has significant effects on the aerodynamic efficiency and service life of an aero-engine. Thus, it is indispensable to finish and strengthen the blades before use. This paper presents a comprehensive literature review of studies on finishing and strengthening technologies for the impeller and blisk of aero-engines. The review includes independent and integrated finishing and strengthening technologies and discusses advanced rotational abrasive flow machining with back-pressure used for finishing the integral impeller and blisk. A brief assessment of future research problems and directions is also presented.

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Surface Roughness Effects on Turbine Blade Aerodynamics

Cited by 49 publications

References 5 publications

Development of a Numerical Based Correlation for Performance Losses due to Surface Roughness in Axial Turbines

Development of a Numerical Based Correlation for Performance Losses due to Surface Roughness in Axial Turbines

On the role of surface roughness in the aerodynamic performance and energy conversion of horizontal wind turbine blades: a review

Machining the Integral Impeller and Blisk of Aero-Engines: A Review of Surface Finishing and Strengthening Technologies

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