简介:TheReynolds-averagedNavier-Stokes(RANS)method,alongwiththeFluentsoftwarepackage,wasusedtostudythesteadyandunsteadyinteractionofpropellersandrudderswithadditionalthrustfins.Theslidingmeshmodelwasemployedtosimulateunsteadyinteractionsbetweentheblades,therudderandthethrustfins.Basedonthenumericalresults,thepressuredistributiononthepropellerandtheefficiencyofthefinswerecalculatedasafunctionoftheattackangle.TheRANSresultswerecomparedwithresultscalculatedbythepotentialmethod.ItwasfoundthattheresultsforthepotentialmethodandtheRANSmethodhavegoodconsistency,buttheyyieldmaximumefficienciesforthefins,andthuscorrespondingattackangles,thatarenotidentical.
简介:在前文讨论现代教学方法和手段在航海教育与培训中研究与应用的基础上,结合新型的现代化教学方式之一———多媒体计算机辅助教学的发展,阐述了航海教育与培训实施计算机辅助教学的必要性,并提出了航海类专业多媒体课件的开发与应用研究原则