ZrB2-SiC Sharp Leading Edges in High Enthalpy Supersonic Flows (Articolo in rivista)

Type
Label
  • ZrB2-SiC Sharp Leading Edges in High Enthalpy Supersonic Flows (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1111/j.1551-2916.2012.05226.x (literal)
Alternative label
  • Monteverde, Frederic; Savino, Raffaele (2012)
    ZrB2-SiC Sharp Leading Edges in High Enthalpy Supersonic Flows
    in Journal of the American Ceramic Society
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Monteverde, Frederic; Savino, Raffaele (literal)
Pagina inizio
  • 2282 (literal)
Pagina fine
  • 2289 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • ID_PUMA: cnr.istec/2012-A0-022. Area di valutazione: 15d - Scienze e tecnologie aerospaziali. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://onlinelibrary.wiley.com/doi/10.1111/j.1551-2916.2012.05226.x/pdf (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 95 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ISTEC; Università di Napoli Federico 2, Dipartimento Ingegneria Aerospaziale (literal)
Titolo
  • ZrB2-SiC Sharp Leading Edges in High Enthalpy Supersonic Flows (literal)
Abstract
  • Aero-thermodynamic tests have been carried out in an arc-jet supersonic plasma wind tunnel using a very sharp wedge made of ultra-high temperature ceramic (UHTC)in the ZrB2-SiC system. The comparison with a lower thermal conductivity ceramic material (Si3N4-MoSi2) with the same sharp shape,pointed out at the performance advantages of the UHTC material. When subjected to heat fluxes in the order of 7 MW/m2,the surface temperature of the UHTC wedge increased up to 2450°C near the leading edge. The present study demonstrated that the high thermally conductive UHTC survived such extreme conditions by re-distributing heat over colder regions downstream of the sharp tip. As a consequence, radiative equilibrium temperatures in the range 1400°C-1650°C were established over 85% of the exposed surface. On the other hand, the less thermally conductive Si3N4-MoSi2 material failed to withstand the same heat flux and underwent partial melting with significant mass loss. The post-test microstructural observations of the UHTC wedge proved to be a fundamental source of information which was input into a Computational Fluid Dynamics (CFD) code and by a thermal simulation software to simulate the experimental tests and correlate the in situ observations of the material evolution during testing. (literal)
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