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Numerical modelling of spray sheet deflection on planing hulls
KTH. (Centre for Naval Architecture, KTH Royal Institute of Technology, Sweden)
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0001-6242-4739
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems. (Centre for Naval Architecture, KTH Royal Institute of Technology, Sweden)ORCID iD: 0000-0002-8343-5098
2017 (English)In: Journal of Engineering for the Maritime Environment (Part M), ISSN 1475-0902, E-ISSN 2041-3084, Vol. 231, no 4, p. 811-817Article in journal (Refereed) Published
Abstract [en]

This paper considers the modelling of spray formation on planing hulls. The focus is on assessing the applicability of the prevailing theories and two-dimensional and three-dimensional Computational Fluid Dynamics (CFD) simulations in the investigation of different design factors for a novel spray deflection concept. The spray deflection concept is presented and its performance is evaluated by comparison with traditional spray rails. It is found that the prevailing theory where the spray field of a planing hull is represented by a two-dimensional flat planing plate will overestimate the spray thickness, whereas the theories that are based on wedge impact are correlating well with the results from the CFD simulations. Compared to a bare hull, adding spray deflectors reduces the viscous resistance by 28% for the studied cases. The spray deflectors further redirect the spray aftwards which reduce the total drag an additional 4%. The paper also discusses various aspects on CFD modelling of spray formation.

Place, publisher, year, edition, pages
SAGE PUBLICATIONS LTD , 2017. Vol. 231, no 4, p. 811-817
Keywords [en]
Planing hulls, spray formation, spray deflection, resistance reduction, CFD
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-217735DOI: 10.1177/1475090216682838ISI: 000414468700001Scopus ID: 2-s2.0-85032952538OAI: oai:DiVA.org:kth-217735DiVA, id: diva2:1159373
Note

QC 20171122

Available from: 2017-11-22 Created: 2017-11-22 Last updated: 2017-11-22Bibliographically approved

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Altimira, MireiaRosén, Anders

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