[article] in Transactions of the ASME . Journal of fluids engineering > Vol. 132 N° 6 (Juin 2010) . - 06 p. | Titre : | Impact of surface roughness on compressor cascade performance | | Type de document : | texte imprimé | | Auteurs : | Seung Chul Back, Auteur ; June Hyuk Sohn, Auteur ; Seung Jin Song, Auteur | | Année de publication : | 2010 | | Article en page(s) : | 06 p. | | Note générale : | fluids engineering | | Langues : | Anglais (eng) | | Mots-clés : | pressure; compressors; surface roughness; cascades (fluid dynamics); chords (trusses); blades | | Résumé : | This paper presents an experimental investigation of roughness effects on aerodynamic performance in a low-speed linear compressor cascade. Equivalent sandgrain roughnesses of 12 μm, 180 μm, 300 μm, 425 μm, and 850 μm have been tested. In nondimensional terms, these roughnesses represent compressor blade roughnesses found in actual gas turbines. Downstream pressure, velocity, and angle have been measured with a five-hole probe at 0.3 chord downstream of the blade trailing edge. For the tested roughnesses of 180 μm, 300 μm, 425 μm, and 850 μm, the axial velocity ratio across the blade row decreases by 0.1%, 2.1%, 2.5%, and 5.4%, respectively. For the same cases, the exit flow angle deviation increases by 24%, 38%, 51%, and 70%, respectively. Finally, the mass-averaged total pressure loss increases by 12%, 44%, 132%, and 217%, respectively. Also, the loss increases more rapidly in the transitionally rough region. Thus, among the three parameters, the loss responds most sensitively to changes in compressor blade roughness. | | DEWEY : | 620.1 | | ISSN : | 0098-2202 | | En ligne : | http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] |
[article] Impact of surface roughness on compressor cascade performance [texte imprimé] / Seung Chul Back, Auteur ; June Hyuk Sohn, Auteur ; Seung Jin Song, Auteur . - 2010 . - 06 p. fluids engineering Langues : Anglais ( eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 132 N° 6 (Juin 2010) . - 06 p. | Mots-clés : | pressure; compressors; surface roughness; cascades (fluid dynamics); chords (trusses); blades | | Résumé : | This paper presents an experimental investigation of roughness effects on aerodynamic performance in a low-speed linear compressor cascade. Equivalent sandgrain roughnesses of 12 μm, 180 μm, 300 μm, 425 μm, and 850 μm have been tested. In nondimensional terms, these roughnesses represent compressor blade roughnesses found in actual gas turbines. Downstream pressure, velocity, and angle have been measured with a five-hole probe at 0.3 chord downstream of the blade trailing edge. For the tested roughnesses of 180 μm, 300 μm, 425 μm, and 850 μm, the axial velocity ratio across the blade row decreases by 0.1%, 2.1%, 2.5%, and 5.4%, respectively. For the same cases, the exit flow angle deviation increases by 24%, 38%, 51%, and 70%, respectively. Finally, the mass-averaged total pressure loss increases by 12%, 44%, 132%, and 217%, respectively. Also, the loss increases more rapidly in the transitionally rough region. Thus, among the three parameters, the loss responds most sensitively to changes in compressor blade roughness. | | DEWEY : | 620.1 | | ISSN : | 0098-2202 | | En ligne : | http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] |
|
Affiner la rechercheImpact of surface roughness on compressor cascade performance / Seung Chul Back in Transactions of the ASME . Journal of fluids engineering, Vol. 132 N° 6 (Juin 2010)
