Utilizza questo identificativo per citare o creare un link a questo documento:
|Titolo:||Dissipation and Cavitation Characteristics of Single-Hole Orifices|
|Autori interni:||MALAVASI, STEFANO|
MESSA, GIANANDREA VITTORIO
|Data di pubblicazione:||2011|
|Rivista:||JOURNAL OF FLUIDS ENGINEERING|
|Abstract:||The purpose of this work is to study the dependence of the pressure losses through sharp-edged oriﬁces with respect to the most signiﬁcant parameters and to ﬁnd an efﬁcient way to check whether cavitation is likely to occur. Computational ﬂuid dynamics was used to simulate the ﬂow through oriﬁces with different geometrical characteristics for various incoming ﬂow velocities. In particular, the diameter ratio was varied between 0.39 and 0.70, the relative thickness between 0.30 and 1.40, and the pipe Reynolds number between 3.85x10^4 and 1.54x10^5. The computed pressure drop coefﬁcient in the region of self-similarity with respect to the pipe Reynolds number was ﬁrst compared to that obtained from some literature models. Afterwards, the comparison with experimental data revealed that an extended pressure criterion is suitable to predict the presence of cavitating conditions. A dimensionless minimum pressure coefﬁcient was then deﬁned, and its dependence upon the above mentioned geometrical and ﬂow parameters was investigated. Finally, a practical formula for the prediction of cavitation was provided. [DOI: 10.1115/1.4004038]|
|Appare nelle tipologie:||01.1 Articolo in Rivista|
File in questo prodotto:
|Malavasi&Messa2011-monoforo_JFG051302.pdf||1.45 MB||Adobe PDF||Post-print||Accesso riservato|
- PubMed Central loading...
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.