A4 Conference proceedings

Nanosecond Laser Ablation of the Trapezoidal Structures for Turbomachinery Applications


Open Access publication

Publication Details
Authors: Kaakkunen Jarno, Tiainen Jonna, Jaatinen-Värri Ahti, Grönman Aki, Lohtander Mika
Publisher: Elsevier: Creative Commons Attribution Non-Commercial No-Derivatives License
Publication year: 2018
Language: English
Related Journal or Series Information: Procedia Manufacturing
Title of parent publication: Proceedings of the 8th Swedish Production Symposium (SPS 2018)
Start page: 435
End page: 442
Number of pages: 8
ISSN: 2351-9789
eISSN: 2351-9789
JUFO-Level of this publication: 1
Open Access: Open Access publication

Abstract

Correctly designed nature inspired micrometer size grooves i.e. riblets
can be used to reduce drag. There exist several methods to manufacture
these structures but all of them have their own problems and
disadvantages, wherefore they are not perfectly suitable for all real
industrial applications. Aim of this paper is to show how a short
nanosecond pulse laser ablation can be applied in a micrometer size
trapezoidal shape structures i.e. riblets manufacturing for a
turbomachinery applications. It is shown that although the quality of
the riblets, fabricated with this method, is not as good as with the
best possible manufacturing methods, it is still enhancing the
properties. Added to this, the processing speed is fast enough and
acquisition costs of the system are economic so that method is suitable
for the real industrial application. The wind tunnel studies indicate
that the fabricated riblets on an airfoil reduce wall shear stress
compared to a smooth airfoil without structuring.


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Last updated on 2019-13-03 at 12:00