High fidelity replication of surface texture and geometric form of a high aspect ratio aerodynamic test component

Karl Walton, Leigh Fleming, Martin N. Goodhand, Radu Racasan, Wenhan Zeng

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper details, assesses and validates a technique for the replication of a titanium wind tunnel test aerofoil in polyurethane resin. Existing resin replication techniques are adapted to overcome the technical difficulties associated with casting a high aspect ratio component. The technique is shown to have high replication fidelity over all important length-scales. The blade chord was accurate to 0.02%, and the maximum blade thickness was accurate to 2.5%. Important spatial and amplitude areal surface texture parameter were accurate to within 2%. Compared to an existing similar system using correlation areal parameters the current technique is shown to have lower fidelity and this difference is discussed. The current technique was developed for the measurement of boundary layer flow 'laminar to turbulent' transition for gas turbine compressor blade profiles and this application is illustrated.

Original languageEnglish
Article number025003
Number of pages12
JournalSurface Topography: Metrology and Properties
Volume4
Issue number2
DOIs
Publication statusPublished - 2 Apr 2016

Fingerprint

Boundary layer flow
Titanium
high aspect ratio
blades
Airfoils
aerodynamics
Turbomachine blades
Polyurethanes
Wind tunnels
Gas turbines
Compressors
Aspect ratio
Aerodynamics
Casting
polyurethane resins
compressor blades
textures
Resins
Textures
wind tunnel tests

Cite this

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title = "High fidelity replication of surface texture and geometric form of a high aspect ratio aerodynamic test component",
abstract = "This paper details, assesses and validates a technique for the replication of a titanium wind tunnel test aerofoil in polyurethane resin. Existing resin replication techniques are adapted to overcome the technical difficulties associated with casting a high aspect ratio component. The technique is shown to have high replication fidelity over all important length-scales. The blade chord was accurate to 0.02{\%}, and the maximum blade thickness was accurate to 2.5{\%}. Important spatial and amplitude areal surface texture parameter were accurate to within 2{\%}. Compared to an existing similar system using correlation areal parameters the current technique is shown to have lower fidelity and this difference is discussed. The current technique was developed for the measurement of boundary layer flow 'laminar to turbulent' transition for gas turbine compressor blade profiles and this application is illustrated.",
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High fidelity replication of surface texture and geometric form of a high aspect ratio aerodynamic test component. / Walton, Karl; Fleming, Leigh; Goodhand, Martin N.; Racasan, Radu; Zeng, Wenhan.

In: Surface Topography: Metrology and Properties, Vol. 4, No. 2, 025003, 02.04.2016.

Research output: Contribution to journalArticle

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T1 - High fidelity replication of surface texture and geometric form of a high aspect ratio aerodynamic test component

AU - Walton, Karl

AU - Fleming, Leigh

AU - Goodhand, Martin N.

AU - Racasan, Radu

AU - Zeng, Wenhan

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AB - This paper details, assesses and validates a technique for the replication of a titanium wind tunnel test aerofoil in polyurethane resin. Existing resin replication techniques are adapted to overcome the technical difficulties associated with casting a high aspect ratio component. The technique is shown to have high replication fidelity over all important length-scales. The blade chord was accurate to 0.02%, and the maximum blade thickness was accurate to 2.5%. Important spatial and amplitude areal surface texture parameter were accurate to within 2%. Compared to an existing similar system using correlation areal parameters the current technique is shown to have lower fidelity and this difference is discussed. The current technique was developed for the measurement of boundary layer flow 'laminar to turbulent' transition for gas turbine compressor blade profiles and this application is illustrated.

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KW - Infrared thermography

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KW - Surface roughness replication

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