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undergraduate thesis
Istraživanje utjecaja ljuljnih kobilica na ukupni otpor broda
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. urn:nbn:hr:235:141360
Badrov, Frano
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Badrov, F. (2022). Istraživanje utjecaja ljuljnih kobilica na ukupni otpor broda (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:141360

Badrov, Frano. "Istraživanje utjecaja ljuljnih kobilica na ukupni otpor broda." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:141360

Badrov, Frano. "Istraživanje utjecaja ljuljnih kobilica na ukupni otpor broda." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:141360

Badrov, F. (2022). 'Istraživanje utjecaja ljuljnih kobilica na ukupni otpor broda', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 25 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:141360

Badrov F. Istraživanje utjecaja ljuljnih kobilica na ukupni otpor broda [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2022 [cited 2024 December 25] Available at: https://urn.nsk.hr/urn:nbn:hr:235:141360

F. Badrov, "Istraživanje utjecaja ljuljnih kobilica na ukupni otpor broda", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:235:141360

Metadata
TitleIstraživanje utjecaja ljuljnih kobilica na ukupni otpor broda
Title (english)An investigation into the effect of bilge keels on the total resistance of a ship
AuthorFrano Badrov
MentorNastia Degiuli (mentor)
MentorIvana Martić (mentor)
Committee memberIvan Ćatipović (predsjednik povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2022-03-04, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Shipbuilding
Hydromechanics of Floating and Maritime Structures
Abstract
U ovom radu provedene su numeričke simulacije pokusa otpora INSEAN 2340 modela broda američke ratne mornarice za goli trup te trup modela broda s privjescima odnosno ljuljnim kobilicama. Numeričke simulacije provedene su primjenom komercijalnog programskog paketa za računalnu dinamiku fluida (RDF) STAR-CCM+. Unutar numeričkih simulacija primijenjen je matematički model nestacionarnog trodimenzijskog viskoznog strujanja fluida sa slobodnom površinom na temelju Reynoldsovih osrednjenih Navier – Stokesovih jednadžbi (eng. Reynolds Averaged Navier -Stokes, RANS). Primijenjen je k - ω model turbulencije i metoda udjela fluida u volumenu (eng. Volume of Fluid, VOF) za praćenje i lociranje slobodne površine. Proveden je postupak verifikacije te je određena numerička nesigurnost rezultata dobivenih primjenom različite gustoće mreže i vremenskog koraka. Dobiveni numerički rezultati za koeficijent ukupnog otpora, uron/izron i trim uspoređeni su s eksperimentalno dobivenim podacima za goli trup. Numerička simulacija pokusa otpora provedena je i za model broda s ljuljnim kobilicama kako bi se odredilo povećanje ukupnog otpora uslijed ljuljnih kobilica te analiziralo strujanje oko njih.
Abstract (english)
In this study numerical simulations of resistance test for the INSEAN 2340 US Navy surface combatant ship model are carried out for bare hull and hull with bilge keels. Numerical simulations are performed within commercial software package for Computational Fluid Dynamics (CFD) STAR-CCM+. Within numerical simulations, a mathematical model of unsteady three-dimensional viscous flow with free surface based on Reynolds Averaged Navier-Stokes (RANS) equations is applied along with the k - ω turbulence model. The Volume of Fluid (VOF) method is used for tracking and locating the free surface. The verification study is performed and the numerical uncertainty of the results obtained using different grid densities and the time step is determined. The obtained numerical results for the total resistance coefficient, sinkage and trim are compared with the experimentally obtained data for the bare hull. Additionally, numerical simulation of the resistance test is performed for the ship model with bilge keels to determine the increase in the total resistance due to bilge keels and to analyze the flow around them.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:141360
Study programmeTitle: Naval Architecture
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka brodogradnje (sveučilišni prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka brodogradnje)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-03-02 09:13:23