SPIV measurements around the DELFT 372 catamaran in steady drift

被引：35

作者：

Falchi, M. ^{[1
]}

Felli, M. ^{[1
]}

Grizzi, S. ^{[1
]}

Aloisio, G. ^{[1
]}

Broglia, R. ^{[1
]}

Stern, F. ^{[2
]}

机构：

[1] CNR, Maritime Res Ctr, CNR INSEAN, I-00128 Rome, Italy

[2] Univ Iowa, IIHR Hydrosci & Engn, Iowa City, IA 52241 USA

来源：

EXPERIMENTS IN FLUIDS | 2014年 / 55卷 / 11期

关键词：

URANS SIMULATIONS; PIV; VALIDATION; VERIFICATION; BEHAVIOR;

D O I：

10.1007/s00348-014-1844-z

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present work concerns the experimental measurements of the velocity field around a catamaran advancing in static drift. The main aim of the paper was to investigate the dynamics of the vortices generated by catamaran hulls with particular emphasis on the mechanisms of generation, detachment, downstream evolution and destabilization. In this context, a Stereo-PIV campaign has been performed to map the velocity fields on some cross-planes along and downstream of the catamaran. Froude numbers equal to 0.4 and 0.5 at drift angles as large as 6 degrees and 9 degrees have been selected as testing conditions. In all the tests, the model has been fixed at the dynamical values of trim and sinkage, measured in a preliminary static drift experiments. Major geometrical and kinematical characteristics of the keel vortices have been documented in the paper through the analysis of the mean and fluctuating components of the velocity and vorticity field. Vortex interaction with the wave pattern has been investigated as well through the use of a conditional average technique of the velocity snapshots with the free surface elevation. As a secondary, but important, outcome, a valuable experimental dataset for CFD benchmarking in severe off-design conditions has been collected.

引用

页数：20

共 52 条

[11] High-fidelity global optimization of shape design by dimensionality reduction, metamodels and deterministic particle swarm [J].

Chen, Xi ;

Diez, Matteo ;

Kandasamy, Manivannan ;

Zhang, Zhiguo ;

Campana, Emilio F. ;

Stern, Frederick .

ENGINEERING OPTIMIZATION, 2015, 47 (04) :473-494

[12]

Di Felice F, 2008, TOP APPL PHYS, V112, P475, DOI 10.1007/978-3-540-73528-1_26

[13] Uncertainty quantification of Delft catamaran resistance, sinkage and trim for variable Froude number and geometry using metamodels, quadrature and Karhunen-LoSve expansion [J].

Diez, Matteo ;

He, Wei ;

Campana, Emilio F. ;

Stern, Frederick .

JOURNAL OF MARINE SCIENCE AND TECHNOLOGY, 2014, 19 (02) :143-169

[14]

DiFelice F., 2012, 29 S NAV HYDR GOTH S

[15]

Egeberg TF, 2014, P ASME 2013 33 INT C

[16]

El-Lababidy S, 2004, P 25 S NAV HYDR ST J

[17]

Etebari A., 2008, P 27 S NAV HYDR SEOU

[18]

Falchi M, 2013, P 10 INT S PART IM V

[19]

Felli M, 2003, P INT S PART IM VEL

[20] Distance effect on the behavior of an impinging swirling jet by PIV and flow visualizations [J].

Felli, Mario ;

Falchi, Massimo ;

Pereira, Francisco Jose Alves .

EXPERIMENTS IN FLUIDS, 2010, 48 (02) :197-209

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