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1、扭曲舵的水動(dòng)力性能研究摘要近些年來(lái),國(guó)際能源局勢(shì)越來(lái)越嚴(yán)重,節(jié)能已經(jīng)成為我國(guó)經(jīng)濟(jì)發(fā)展中的長(zhǎng)期戰(zhàn)略任務(wù),船舶作為當(dāng)今的主要運(yùn)輸工具,其節(jié)能技術(shù)備受關(guān)注。節(jié)能附體因成本較低,安裝簡(jiǎn)便等優(yōu)點(diǎn),已得到廣泛使用。扭曲舵是一種新型節(jié)能附體,可通過(guò)扭曲舵葉剖面束適應(yīng)螺旋槳尾流,以進(jìn)一步提高推進(jìn)效率。本文對(duì)扭曲舵進(jìn)行了研究,主要的工作有:介紹了CFD方法的基本理論,并用CFD軟件FLUENT計(jì)算了敞水槳和槳舵干擾的水動(dòng)力性能,與實(shí)驗(yàn)值進(jìn)行了比較,驗(yàn)證了CFD方法定常和非定常計(jì)算的有效性,并對(duì)槳舵干擾的流場(chǎng)特性進(jìn)行了研究;介紹了基于面元法的螺旋槳和槳舵干擾問(wèn)題求解方法,以此方法預(yù)報(bào)了敞
2、水槳和槳一舵系統(tǒng)性能,計(jì)算值與實(shí)驗(yàn)值及CFD結(jié)果吻合良好,并研究了舵敝水和在槳后情況的舵前流場(chǎng);根據(jù)扭曲舵的工作原理和螺旋槳后的流場(chǎng)特性,對(duì)扭曲舵進(jìn)行了設(shè)計(jì)和建模,分別應(yīng)用CFD方法和面元法對(duì)槳與扭曲舵相互干擾水動(dòng)力性能進(jìn)行了計(jì)算與比較。同時(shí),研究了扭曲舵和普通舵在螺旋槳后的空泡性能。結(jié)果表明,扭曲舵的節(jié)能效果較普通舵為佳,且具有較好的空泡性能。關(guān)鍵詞:節(jié)能;扭曲舵;螺旋槳;水動(dòng)力性能;空泡手H曲舵的水動(dòng)力性能研究AbstractRecently,withtheinternationalenergysourceprobleminseriouslack,Energy-s
3、avingbecomesalong—rangestrategicmissionintheeconomydevelopment.Shipistheoneofthemaintransports,whoseenergy—savingtechnologieshavebeenpaidmoreattention.Withlowcost,easyinstallationandetc,Energy—savingappendagesarewidelyapplied.Anewenergy-savingappendage---skewrudderwasstudiedinthethesisw
4、hichcanimprovepropeleffectbyskewingtheprofileofruddertofitthevelocityfieldafterpropeller.Themaincontentsofthethesisareasfollows:ThebasictheoryofCFDmethodwasintroduced.ThesteadyandunsteadyperformancesofopenpropellerandpropellerrudderinterferencewerecalculatedbyFLUENT.Comparingwithtestval
5、ues,themethodwasconfirmed.Thevelocityfieldofpropellerandruddersystemwasstudiedatthesametime;Surfacepanelmethodwasintroducedtosolvepropellerandpropeller-ruddersystemproblem.OpenpropellerperformanceandpropellerrudderinterferenceperformanceⅥ撇calculatedagainbythismethod.Thecomputedresultsag
6、reefairlywell、柝tllCFDresultsandtheexperimentaldata.ThevelocityfieldofopenrudderandrudderafterpropellerⅥ陀.reanalyzed;Accordingtotheworkingprincipleofskewrudderandthevelocityfieldafterpropeller,skewruddermodelWasdesigned.TheCFDmethodandsurfacepanelmethodwereappliedtopredictthehydrodynamic
7、performanceofpropellerandskewruddersystem.Meanwhile,thecavitationperformanceofnormalrudderandskewrudderwerestudied.Theoreticalstudieshaveshownthattheenergy—savingeffectandcavitationperformanceofskewrudderarebetterthannormalrudder.Keywords:energy-saving;skewrudder;propeller;hydr