Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | WGP Congress 2012 - Progress in Production Engineering |
| Herausgeber (Verlag) | Trans Tech Publications |
| Seiten | 463-473 |
| Seitenumfang | 11 |
| ISBN (Print) | 9783038350538 |
| Publikationsstatus | Veröffentlicht - 9 Apr. 2014 |
| Veranstaltung | WGP Congress 2012 - Berlin, Deutschland Dauer: 27 Juni 2012 → 28 Juni 2012 |
Publikationsreihe
| Name | Advanced Materials Research |
|---|---|
| Band | 907 |
| ISSN (Print) | 1022-6680 |
Abstract
The effectiveness of gas turbines can be improved significantly by decreasing the friction losses. Compared to smooth surfaces riblet-structures have been proven to reduce skin friction in turbulent flow up to 10%. For the technical application on compressor blades in turbo machines, micro riblet-structures with a riblet width between 20 μm and 120 μm and a depth of the half width are required. Furthermore, the application on compressor blades needs ideal riblet-geometries with an aspect ratio of 0.5, trapezoid groove geometry and a shape accuracy of the compressor blade about 10 μm. This paper presents the relevant influencing factors on the overall shape accuracy as well as the riblet geometry in five axes grinding of riblet-structures on double curved compressor blades. The results show, that the shape accuracy is affected by the CAD data and the macrogeometry of the grinding wheel. Therefore, specialized requirements on the CAD data were defined in order to increase the shape accuracy. To decrease the influence of the grinding wheel geometry on the overall shape geometry, a method adjusting the grinding wheel geometry on double curved surfaces was developed. Furthermore, the effect of the 5 axes kinematic on the aspect ratio and the profile wear was examined.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Allgemeiner Maschinenbau
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WGP Congress 2012 - Progress in Production Engineering. Trans Tech Publications, 2014. S. 463-473 (Advanced Materials Research; Band 907).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Grinding of Riblet Structures on Free Formed Compressor Blades
AU - Denkena, Berend
AU - Köhler, Jens
AU - Krawczyk, Thomas
PY - 2014/4/9
Y1 - 2014/4/9
N2 - The effectiveness of gas turbines can be improved significantly by decreasing the friction losses. Compared to smooth surfaces riblet-structures have been proven to reduce skin friction in turbulent flow up to 10%. For the technical application on compressor blades in turbo machines, micro riblet-structures with a riblet width between 20 μm and 120 μm and a depth of the half width are required. Furthermore, the application on compressor blades needs ideal riblet-geometries with an aspect ratio of 0.5, trapezoid groove geometry and a shape accuracy of the compressor blade about 10 μm. This paper presents the relevant influencing factors on the overall shape accuracy as well as the riblet geometry in five axes grinding of riblet-structures on double curved compressor blades. The results show, that the shape accuracy is affected by the CAD data and the macrogeometry of the grinding wheel. Therefore, specialized requirements on the CAD data were defined in order to increase the shape accuracy. To decrease the influence of the grinding wheel geometry on the overall shape geometry, a method adjusting the grinding wheel geometry on double curved surfaces was developed. Furthermore, the effect of the 5 axes kinematic on the aspect ratio and the profile wear was examined.
AB - The effectiveness of gas turbines can be improved significantly by decreasing the friction losses. Compared to smooth surfaces riblet-structures have been proven to reduce skin friction in turbulent flow up to 10%. For the technical application on compressor blades in turbo machines, micro riblet-structures with a riblet width between 20 μm and 120 μm and a depth of the half width are required. Furthermore, the application on compressor blades needs ideal riblet-geometries with an aspect ratio of 0.5, trapezoid groove geometry and a shape accuracy of the compressor blade about 10 μm. This paper presents the relevant influencing factors on the overall shape accuracy as well as the riblet geometry in five axes grinding of riblet-structures on double curved compressor blades. The results show, that the shape accuracy is affected by the CAD data and the macrogeometry of the grinding wheel. Therefore, specialized requirements on the CAD data were defined in order to increase the shape accuracy. To decrease the influence of the grinding wheel geometry on the overall shape geometry, a method adjusting the grinding wheel geometry on double curved surfaces was developed. Furthermore, the effect of the 5 axes kinematic on the aspect ratio and the profile wear was examined.
KW - Dressing
KW - Five axes grinding
KW - Micro pattern
UR - http://www.scopus.com/inward/record.url?scp=84901279647&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/amr.907.463
DO - 10.4028/www.scientific.net/amr.907.463
M3 - Conference contribution
AN - SCOPUS:84901279647
SN - 9783038350538
T3 - Advanced Materials Research
SP - 463
EP - 473
BT - WGP Congress 2012 - Progress in Production Engineering
PB - Trans Tech Publications
T2 - WGP Congress 2012
Y2 - 27 June 2012 through 28 June 2012
ER -