This work deals with the influence of roughness on high-pressure steam turbine stages. It is divided in three parts. In the first one, an experimental campaign on a linear cascade is described, in which blade losses are measured for different values of surface roughness and in a range of Reynolds numbers of practical interest. The second part is devoted to the basic aspects of the numerical approach, and consists of a detailed discussion of the roughness models used for computations. The fidelity of such models is then tested against measurements, thus allowing their fine-tuning and proving their reliability. Finally, comprehensive CFD analysis is carried out on a high-pressure stage, in order to investigate the influence of roughness on the losses over the entire stage operating envelope. Unsteady effects that may affect the influence of the roughness, such as the upcoming wakes on the rotor blade, are taken into account, and the impact of transition-related aspects on the losses is discussed.

The Influence of Roughness on a High-Pressure Steam Turbine Stage: an Experimental and Numerical Study / J Bellucci; F Rubechini; M Marconcini; A Arnone; L Arcangeli; N Maceli; V Dossena. - In: JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. - ISSN 0742-4795. - ELETTRONICO. - 137:(2015), pp. 012602-1-012602-9. [10.1115/1.4028205]

The Influence of Roughness on a High-Pressure Steam Turbine Stage: an Experimental and Numerical Study

BELLUCCI, JURI;RUBECHINI, FILIPPO;MARCONCINI, MICHELE;ARNONE, ANDREA;
2015

Abstract

This work deals with the influence of roughness on high-pressure steam turbine stages. It is divided in three parts. In the first one, an experimental campaign on a linear cascade is described, in which blade losses are measured for different values of surface roughness and in a range of Reynolds numbers of practical interest. The second part is devoted to the basic aspects of the numerical approach, and consists of a detailed discussion of the roughness models used for computations. The fidelity of such models is then tested against measurements, thus allowing their fine-tuning and proving their reliability. Finally, comprehensive CFD analysis is carried out on a high-pressure stage, in order to investigate the influence of roughness on the losses over the entire stage operating envelope. Unsteady effects that may affect the influence of the roughness, such as the upcoming wakes on the rotor blade, are taken into account, and the impact of transition-related aspects on the losses is discussed.
2015
137
012602-1
012602-9
Goal 7: Affordable and clean energy
J Bellucci; F Rubechini; M Marconcini; A Arnone; L Arcangeli; N Maceli; V Dossena
File in questo prodotto:
File Dimensione Formato  
gtp_137_01_012602.pdf

Accesso chiuso

Descrizione: Articolo principale.
Tipologia: Pdf editoriale (Version of record)
Licenza: Tutti i diritti riservati
Dimensione 1.57 MB
Formato Adobe PDF
1.57 MB Adobe PDF   Richiedi una copia

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/885918
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 17
  • ???jsp.display-item.citation.isi??? 14
social impact