Relevant bibliographies by topics / BLADE ROUGHNESS

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'BLADE ROUGHNESS'

Author: Grafiati
Published: 11 September 2023
Last updated: 31 July 2025

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Journal articles on the topic "BLADE ROUGHNESS"

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Chen, Yan, Chunxiang Gao, and Wuli Chu. "Effect and Mechanism of Roughness on the Performance of a Five-Stage Axial Flow Compressor." Aerospace 9, no. 8 (2022): 428. http://dx.doi.org/10.3390/aerospace9080428.

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In order to prolong the service life of multistage axial compressors, it is increasingly important to study the influence of blade surface roughness on the compressor performance. In this paper, a five-stage axial compressor of a real aero-engine was selected as the research object, and an equivalent gravel roughness model was used to model the roughness based on measured blade surface roughness data. Furthermore, the impact of blade surface roughness on the performance at design rotational speed was studied by full three-dimensional numerical simulation, and the mechanism of performance varia
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Yun, Yong Il, Il Young Park, and Seung Jin Song. "Performance Degradation due to Blade Surface Roughness in a Single-Stage Axial Turbine." Journal of Turbomachinery 127, no. 1 (2005): 137–43. http://dx.doi.org/10.1115/1.1811097.

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Turbine blades experience significant surface degradation with service. Previous studies indicate that an order-of-magnitude or greater increase in roughness height is typical, and these elevated levels of surface roughness significantly influence turbine efficiency and heat transfer. This paper presents measurement and a mean-line analysis of turbine efficiency reduction due to blade surface roughness. Performance tests have been conducted in a low-speed, single-stage, axial flow turbine with roughened blades. Sheets of sandpaper with equivalent sandgrain roughnesses of 106 and 400 μm have be
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Liu, Chen, Yipeng Cao, Sihui Ding, Wenping Zhang, Yuhang Cai, and Aqiang Lin. "Effects of blade surface roughness on compressor performance and tonal noise emission in a marine diesel engine turbocharger." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 14 (2020): 3476–90. http://dx.doi.org/10.1177/0954407020927637.

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A numerical study was conducted to investigate the effects of blade surface roughness on compressor performance and tonal noise emission. The equivalent sand-grain roughness model was used to account for blade surface roughness, and a hybrid method that combines computational fluid dynamics and boundary element method was used to predict compressor performance and tonal noise. The numerical approach was validated against experimental data for a baseline compressor. Nine different cases with different blade surface roughness were studied in this paper, the global performance was analyzed under
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Tangler, J. L. "Influence of Pitch, Twist, and Taper on a Blade’s Performance Loss due to Roughness." Journal of Solar Energy Engineering 119, no. 3 (1997): 248–52. http://dx.doi.org/10.1115/1.2888027.

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The purpose of this study was to determine the influence of blade geometric parameters such as pitch, twist, and taper on a blade’s sensitivity to leading edge roughness. The approach began with an evaluation of available test data of performance degradation due to roughness effects for several rotors. In addition to airfoil geometry, this evaluation suggested that a rotor’s sensitivity to roughness was also influenced by the blade geometric parameters. Parametric studies were conducted using the PROP93 computer code with wind tunnel airfoil characteristics for smooth and rough surface conditi
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Özgen, Serkan, Eda Bahar Sarıbel, and Ali Rıza Yaman. "Effect of blade contamination on power production of wind turbines." Journal of Physics: Conference Series 2265, no. 3 (2022): 032012. http://dx.doi.org/10.1088/1742-6596/2265/3/032012.

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Abstract Wind turbines suffer from considerable power losses because of contamination on their blades, that can be due to erosion, wear, smog, insect, sand and dust particle impact. Blade contamination, its effects on the flows over the wind turbine blades and consequent power production losses form the main focus of the present study. These effects are mainly due to increased roughness on the blades leading to earlier laminar-turbulent transition and consequently, thicker boundary-layers on the blades. Early laminar-turbulent transition leads to a larger part of the flow over a blade being tu
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Mulleners, K., P. Gilge, and S. Hohenstein. "Impact of Surface Roughness on the Turbulent Wake Flow of a Turbine Blade." Journal of Aerodynamics 2014 (December 30, 2014): 1–9. http://dx.doi.org/10.1155/2014/458757.

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Roughened aeroengine blade surfaces lead to increased friction losses and reduced efficiency of the individual blades. The surface roughness also affects the wake flow of the blade and thus the inflow conditions for the subsequent compressor or turbine stage. To investigate the impact of surface roughness on a turbulent blade wake, we conducted velocity field measurements by means of stereo particle image velocimetry in the wake of a roughened turbine blade in a linear cascade wind tunnel. The turbine blade was roughened at different chordwise locations. The influence of the chordwise location
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Gutiérrez, R., E. Llorente, and D. Ragni. "Induced stalled flow due to roughness sensitivity for thick airfoils in modern wind turbines." Journal of Physics: Conference Series 2151, no. 1 (2022): 012001. http://dx.doi.org/10.1088/1742-6596/2151/1/012001.

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Abstract The mid-span region of wind turbine blades can be thickened to fulfil the structural requirements of the blade. Hence, thick airfoils, that were designed to operate at the root region of the blade, are moved to the mid-span region. This could not imply remarkable variations of the blade performance once its surface is smooth. However, the sensitivity of thick airfoils to roughness could cause significant aerodynamic impacts such as flow separation. This research aims to quantify the impact of the blade thickness, under smooth and rough conditions, in the annual energy production and t
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Caccia, Francesco, and Alberto Guardone. "Numerical simulations of ice accretion on wind turbine blades: are performance losses due to ice shape or surface roughness?" Wind Energy Science 8, no. 3 (2023): 341–62. http://dx.doi.org/10.5194/wes-8-341-2023.

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Abstract. Ice accretion on wind turbine blades causes both a change in the shape of its sections and an increase in surface roughness. These lead to degraded aerodynamic performances and lower power output. Here, a high-fidelity multi-step method is presented and applied to simulate a 3 h rime icing event on the National Renewable Energy Laboratory 5 MW wind turbine blade. Five sections belonging to the outer half of the blade were considered. Independent time steps were applied to each blade section to obtain detailed ice shapes. The roughness effect on airfoil performance was included in com
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Gilge, Philipp, Andreas Kellersmann, Jens Friedrichs, and Jörg R. Seume. "Surface roughness of real operationally used compressor blade and blisk." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 14 (2019): 5321–30. http://dx.doi.org/10.1177/0954410019843438.

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Deterioration of axial compressors is in general a major concern in aircraft engine maintenance. Among other effects, roughness in high-pressure compressor reduces the pressure rise and thus efficiency, thereby increasing the specific fuel consumption of an engine. Therefore, it is important to improve the understanding of roughness on compressor blading and their impact on compressor performance. To investigate the surface roughness of rotor blades of a compressors, different stages of an axial high-pressure compressor and a first-stage blisk (BLade–Integrated–dISK) of a regional aircraft eng
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Hamed, Awatef A., Widen Tabakoff, Richard B. Rivir, Kaushik Das, and Puneet Arora. "Turbine Blade Surface Deterioration by Erosion." Journal of Turbomachinery 127, no. 3 (2004): 445–52. http://dx.doi.org/10.1115/1.1860376.

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This paper presents the results of a combined experimental and computational research program to investigate turbine vane and blade material surface deterioration caused by solid particle impacts. Tests are conducted in the erosion wind tunnel for coated and uncoated blade materials at various impact conditions. Surface roughness measurements obtained prior and subsequent to the erosion tests are used to characterize the change in roughness caused by erosion. Numerical simulations for the three-dimensional flow field and particle trajectories through a low-pressure gas turbine are employed to
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Dissertations / Theses on the topic "BLADE ROUGHNESS"

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Vigueras, Zuniga Marco Osvaldo. "Analysis of gas turbine compressor fouling and washing on line." Thesis, Cranfield University, 2007. http://hdl.handle.net/1826/2448.

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This work presents a model of the fouling mechanism and the evaluation of compressor washing on line. The results of this research were obtained from experimental and computational models. The experimental model analyzed the localization of the particle deposition on the blade surface and the change of the surface roughness condition. The design of the test rig was based on the cascade blade arrangement and blade aerodynamics. The results of the experiment demonstrated that fouling occurred on both surfaces of the blade. This mechanism mainly affected the leading edge region of the blade. The
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Wammack, James Edward. "Evolution of Turbine Blade Deposits in an Accelerated Deposition Facility: Roughness and Thermal Analysis." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1067.pdf.

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Fritzsche, Jörg. "Haftkräfte zwischen technisch rauen Oberflächen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2017. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-217698.

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Die eingereichte Dissertation beschäftigt sich mit der messtechnischen Erfassung sowie der Modellierung von Haftkräften zwischen rauen Oberflächen. Dabei wurden durch Variation von Flüssigkeiten sowie dem Nutzen beschichteter Oberflächen verschiedene Benetzungseigenschaften eingestellt und untersucht. Zusätzlich wurden neben dem Kontaktwinkel der untersuchten Systeme die freien Ober- und Grenzflächenenergien bestimmt und mit den Kräften korreliert. Es zeigte sich, dass Haftkräfte auf rauen Oberflächen stets über mehrere Größenordnungen verteilt vorliegen. Die Beschreibung der ermittelten Verte
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SATYAVANA, DAMYANTI. "EFFECT OF LOCALIZED BLADE ROUGHNESS WITH DIFFERENT VELOCITIES IN AN AXIAL FLOW COMPRESSOR CASCADE." Thesis, 2014. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15620.

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A computational study has been conducted for different inlet velocities in linear axial flow Compressor Cascade focusing mainly on analysis of the effect of Localized blade roughness with different velocities on the aerodynamic performance of the Cascade. Measurement of pressure loss was carried out for various values of velocities with different Localized roughness on the blades of Cascade because the roughness on the blade surfaces can never be same. Except this the effect of different inlet velocities on pressure losses are also analyzed. The Gambit 2.4.6® was used for creating geome
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"Effect of blade surface roughness on profile loss and exit angle in a rectilinear steam turbine cascade." Thesis, 2002. http://localhost:8080/iit/handle/2074/5137.

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Wu, Jhih-Wei, and 吳志偉. "Numerical Study on the Aerodynamic Characteristics and Performance of the Roughness Applied on Blade in the Vertical Axis Wind Turbine." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/36nh42.

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碩士<br>國立虎尾科技大學<br>航空與電子科技研究所<br>102<br>The vertical axis wind turbines have an advantage over the horizontal axis wind turbines such as easy installation, less susceptibility to wind shift and low noise. They are very suitable to be installed in urban and suburban region. The vertical axis-wind turbine has great potential for promoting green energy in residential life. Since the stall angle can be enhanced by increasing the roughness appropriately on blade surface. This study integrated the SST k-ω turbulence module into the computational fluid finite volume method to explore the aerodynamic c
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Chen, Yi-Hsiang, and 陳益祥. "The Effect of Blade Type and Roughness of Rear Wall on the Performance and the Acoustic Noise of the Cross Flow Fan." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/269nvk.

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碩士<br>國立臺北科技大學<br>冷凍空調工程系所<br>93<br>In order to improve the noise characteristics in the flow field of the cross flow fan (CFF), the present study adopted the CFD software-FLUENT to simulate the internal flow field of CFF and the sound pressure level by changing the blade type and wall roughness. Under the same of the rotational speed, the effects of different blade type and roughness on the fan performance and the characteristics of eccentric vortex were investigated. From the numerical results, it is found that: (1) the blade frequency tone for the fan can be significantly reduced by using t
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SINGORIA, VINOD KUMAR. "STUDY OF EFFECT OF GAS TURBINE AND COMPRESSOR BLADES DETERIORATION ON THE PERFORMANCE OF GAS TURBINE POWER PLANT." Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15015.

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The efficiency of gas turbines used in power plants is largely dependent on their aerodynamic performance. The components like stators and rotors of the turbines and compressor are subject to abrasive and erosive wear. There are various contaminants which get deposited over the blades and produce roughnesses. The roughness magnitude both in turbines & compressors varies along the height and chord of blade and also over different stages of turbine. In actual turbines and compressors, roughness is not only found over entire surfaces of the blades but over a small portion of the surface of
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Fritzsche, Jörg. "Haftkräfte zwischen technisch rauen Oberflächen." Doctoral thesis, 2016. https://tubaf.qucosa.de/id/qucosa%3A23101.

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Die eingereichte Dissertation beschäftigt sich mit der messtechnischen Erfassung sowie der Modellierung von Haftkräften zwischen rauen Oberflächen. Dabei wurden durch Variation von Flüssigkeiten sowie dem Nutzen beschichteter Oberflächen verschiedene Benetzungseigenschaften eingestellt und untersucht. Zusätzlich wurden neben dem Kontaktwinkel der untersuchten Systeme die freien Ober- und Grenzflächenenergien bestimmt und mit den Kräften korreliert. Es zeigte sich, dass Haftkräfte auf rauen Oberflächen stets über mehrere Größenordnungen verteilt vorliegen. Die Beschreibung der ermittelten Verte
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Books on the topic "BLADE ROUGHNESS"

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Turbine Blade Surface Roughness Effects on Shear Drag and Heat Transfer. Storming Media, 2001.

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Book chapters on the topic "BLADE ROUGHNESS"

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Seehausen, Hendrik, and Joerg R. Seume. "Influence of Complex Surface Structures on the Aerodynamic Loss Behaviour of Blades." In Regeneration of Complex Capital Goods. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-51395-4_9.

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AbstractOperating airfoils under mechanical stress in combination with oxidation and corrosion, abrasion wear, and subsequent regeneration results in complex surface structures that influence the performance of aircraft engines. For predicting this impact on performance the authors propose a reduced order model capable of assessing the effect of surface roughness as a basis for making decisions before or during the regeneration process. The accuracy of this model is increased by using improved roughness sensitive transition and turbulence models created for Reynolds-Averaged Navier–Stokes simu
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Munoz Lopez, Edwin J., and Alexander Hergt. "Experimental and Numerical Investigations of SBLI and Flow Control on a Transonic Compressor Cascade." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-86605-0_14.

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Abstract The flow through a transonic compressor cascade is inherently unsteady due to the shock-boundary layer interactions (SBLI) on the blade. Despite decades of research, few details are known about the mechanisms that cause such behavior. This chapter presents a multidisciplinary study aiming to elucidate these mechanisms and optimize flow control methods to mitigate their effects. For this purpose, the Transonic Cascade TEAMAero was first optimized and its performance was validated experimentally. The cycle of shock oscillation was then compared using advanced experimental measurement te
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Undreiner, S., and E. Dueymes. "Influence of the Blade Roughness on the Hydraulic Performance of a Mixed-Flow Pump. A Viscous Analysis." In Hydraulic Machinery and Cavitation. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_43.

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Kondus, Vladyslav, Vladyslav Andrusiak, Mykola Sotnyk, Vadym Polkovnychenko, and Maksym Mushtai. "The Influence of the Impeller Inter-blade Channels Roughness on the Energy Parameters of the Submersible Pump." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-63720-9_22.

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Hanfy, Ahmed H., Pawel Flaszyński, Piotr Kaczyński, and Piotr Doerffer. "Surface Roughness Effect on Shock Boundary Layer Interaction on Compressor Rotor Profile." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-86605-0_15.

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Abstract High-pressure ratios in transonic compressor rotors and fan blades pose challenges such as supersonic speeds and shock waves, which can result in boundary layer separation and potential performance issues. This study presents experimental research exploring the effect of surface roughness on shockwave-boundary layer interaction (SBLI). By employing various measurement techniques, the study provides a comprehensive overview of how surface roughness affects SBLI, enriching the dataset for internal flows across four specimens with different roughness parameters. The findings indicate tha
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Vel, E. Karthik, Sanchay Vandish, Mugil Ramesh, Samar Pratap Rai, and S. Nadaraja Pillai. "Experimental Investigation of Trailing Edge Surface Roughness on the Aerodynamic Characteristics of the Wind Turbine Blades." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1033-1_4.

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Ky, Le Hong, and Tran Vinh Hung. "The Effects of Technological Parameters on the Accuracy and Surface Roughness of Turbine Blades When Machining on CNC Milling Machines." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99666-6_42.

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Xu, Zhi. "Numerical Simulation of Icing Characteristics on a Blade Airfoil for Vertical-axis Wind Turbine under Various Icing Conditions." In Wind Turbine Icing [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112398.

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The phenomenon of icing on wind turbines gives rise to significant liability concerns in regions characterized by cold and humid climates, especially those with extreme climatic conditions. Accordingly, investigating the icing characteristics is essential for the safety operation of wind turbines. In this chapter, an icing model coupling water film flow with water film evaporation considering airfoil surface roughness is developed to investigate the effect of icing conditions on the icing characteristics of a blade airfoil for vertical-axis wind turbines by numerical simulation. The mechanism
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"The Mechanisms and Manifestations of Friction." In Tribomaterials. ASM International, 2021. http://dx.doi.org/10.31399/asm.tb.tpsfwea.t59300013.

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Abstract This chapter reviews the types of friction that are of concern in tribological systems along with their associated causes and effects. It discusses some of the early discoveries that led to the development of friction laws and the understanding that friction is a system effect that can be analyzed based on energy dissipation. It describes the stick-slip behavior observed in wiper blades, the concept of asperities, and the significance of the shape, lay, roughness, and waviness of surfaces in sliding contact. It explains how friction forces are measured and how they are influenced by s
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Antolin, William P., Aurélien Costes, Mélanie C. Rochoux, and Patrick Le Moigne. "Accounting for the canopy drag effects on wildland fire spread in coupled atmosphere/fire simulations." In Advances in Forest Fire Research 2022. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_145.

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While near-surface wind is the main influential parameter governing the fire rate of spread (ROS), its characterization remains key to simulate wildland fire behavior. The correct repre- sentation of the intensity and variability of the near-surface wind under complex terrain and vegetation remains an open problem but is essential to make a coupled atmosphere-fire model applicable to actual wildfires. In this work, we study the impact of canopy drag effects on the near-surface flow and the fire behavior simulated by the coupled Meso-NH/BLAZE model in the context of the FireFlux I experimental
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Conference papers on the topic "BLADE ROUGHNESS"

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Cheng, Baofeng, Kenneth Brentner, Yiqiang Han, Jose Palacios, and Philip Morris. "Quantification of Rotor Surface Roughness due to Ice Accretion via Broadband Noise Measurement." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9411.

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The change of rotor broadband noise due to different surface roughness heights is investigated. The goal of the present work is to quantify the surface roughness at the early stage of helicopter rotor ice accretion through acoustic measurement. Proof-of-concept measurements have been performed in the Adverse Environment Rotor Test Stand (AERTS) facility at The Pennsylvania State University to explore the effect of different surface roughness heights on rotor broadband noise. First, sand paper with different grit sizes is applied to the leading edge of the blade to represent different surface r
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Lyu, Yang, Yushan Lyu, and Xingshan Li. "Study on milling surface roughness of a milling cutter with the cutter blade arranged according to phyllotactic pattern." In International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2024), edited by Liang Hu. SPIE, 2025. https://doi.org/10.1117/12.3065209.

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Back, Seung Chul, In Cheol Jeong, Jeong Lak Sohn, and Seung Jin Song. "Influence of Surface Roughness on the Performance of a Compressor Blade in a Linear Cascade: Experiment and Modeling." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59703.

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Compressor blades experience significant surface degradation with service. Elevated levels of surface roughness reduce compressor efficiency and mass flow rate. This paper presents measurement and a new model of compressor blade performance degradation due to blade surface roughness. Performance tests have been conducted in a low-speed, linear cascade with roughened compressor blades. Equivalent sandgrain roughnesses of 12, 180, 300, 425, and 850 microns have been tested. These roughness values are representative of compressor blade roughnesses found in actual gas turbines in service. Flow ang
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Yun, Yong Il, Il Young Park, and Seung Jin Song. "Performance Degradation Due to Blade Surface Roughness in a Single-Stage Axial Turbine." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53094.

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Turbine blades experience significant surface degradation with service. Previous studies indicate that an order of magnitude or greater increase in roughness height is typical, and these elevated levels of surface roughness significantly influence turbine efficiency and heat transfer. This paper presents measurement and a mean line analysis of turbine efficiency reduction due to blade surface roughness. Performance tests have been conducted in a low speed, single-stage, axial flow turbine with roughened blades. Sheets of sandpaper with equivalent sandgrain roughnesses of 106 and 400 μm have be
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Hummel, Frank, Michael Lo¨tzerich, Pasquale Cardamone, and Leonhard Fottner. "Surface Roughness Effects on Turbine Blade Aerodynamics." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53314.

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The aerodynamic performance of a turbine blade was evaluated via total pressure loss measurements on a linear cascade. The Reynolds number was varied from 600,000 to 1,200,000 to capture the operating regime for heavy-duty gas turbines. Four different types of surface roughness on the same profile were tested in the High Speed Cascade Wind Tunnel of the University of the German Armed Forces Munich and evaluated against a hydraulically smooth reference blade. The ratios of surface roughness to chord length for the test blade surfaces are in the range of Ra/c = 7.6×10−06 – 7.9×10−05. The total p
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Rooij, R. P. J. O. M., and W. A. Timmer. "Roughness Sensitivity Considerations for Thick Rotor Blade Airfoils." In 41st Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-350.

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van Rooij, R. P. J. O. M., and W. A. Timmer. "Roughness Sensitivity Considerations for Thick Rotor Blade Airfoils." In ASME 2003 Wind Energy Symposium. ASMEDC, 2003. http://dx.doi.org/10.1115/wind2003-350.

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In modern wind turbine blades airfoils of more than 25% thickness can be found at mid-span and inboard locations. In particular at mid-span aerodynamic requirements dominate, demanding a high lift-to-drag ratio, moderate to high lift and low roughness sensitivity. Towards the root srtuctural requirements become more important. In this paper the performance for the airfoil series DU, FFA, S8xx, AH, Riso̸ and NACA are reviewed. For the 25% and 30% thick airfoils the best performing airfoils can be recognized by a restricted upper surface thickness and a S-shaped lower surface for aft-loading. Di
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McIlroy, Hugh M., Ralph S. Budwig, and Donald M. McEligot. "Scaling of Turbine Blade Roughness for Model Studies." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42167.

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The purpose of this note is to provide an approach to scaling turbine blade roughness so a large-scale experiment will yield useful results despite lack of detailed knowledge about the application. In the process, an apparently new approach for scaling of actual turbine blade roughness on an experimental model of a rough turbine blade is presented. Rough surface data from a first-stage high-pressure turbine rotor, estimates of engine operating conditions representative of high-performance aircraft, and assumed matches of the Reynolds number and acceleration parameter ranges are used. A scaling
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Gregg, Jason R., and Kenneth W. Van Treuren. "Experimental Testing of Periodic Roughness Elements on a Small Scale Wind Turbine Blade." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38863.

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When studied in large wind turbines, roughness on wind turbine blades has been shown to decrease wind turbine performance by up to 50%. However, during wind turbine testing in the Baylor University Subsonic Wind Tunnel, roughness effects that were an artifact of the blade manufacturing process led to a significant power increase over smooth blades at the design wind speed of 10 mph. These results have led to an investigation of the effects of roughness on wind turbine performance under a flow condition with local Reynolds numbers ranging from 14,200 to 58,800. It was found that under these flo
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Boynton, J. L., R. Tabibzadeh, and S. T. Hudson. "Investigation of Rotor Blade Roughness Effects on Turbine Performance." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-297.

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The cold air test program was completed on the SSME (Space Shuttle Main Engine) HPFTP (High Pressure Fuel Turbopump) turbine with production nozzle vane rings and polished coated rotor blades with a smooth surface finish of 30 microinch (0.76 micrometer) RMS (Root Mean Square). The smooth blades were polished by an abrasive flow machining process. The test results were compared with the air test results from production rough coated rotor blades with a surface finish of up to 400 microinch (10.16 micrometer) RMS. Turbine efficiency was higher for the smooth blades over the entire range tested.
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Reports on the topic "BLADE ROUGHNESS"

1

Wilcox, Benjamin J., Edward B. White, and David Charles Maniaci. Roughness Sensitivity Comparisons of Wind Turbine Blade Sections. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1404826.

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2

Raben, Sam, Pavlos Vlachos, and Wing Ng. Effects of Leading Edge Film-Cooling and Surface Roughness on the Downstream Film-Cooling Along a Transonic Turbine Blade for Low and High Free-Stream Turbulence. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada479415.

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