英语文章总结范文Word文件下载.docx
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英语文章总结范文Word文件下载.docx
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(4)本课题的局限性、不足之处,还有哪些尚待解决的问题。
(5)展望前景,或指出进一步研究的方向。
Conclusion通常使用现在时态Result和Conclusion本次选取5篇文章,第一篇,论文中的主要Result已在第2部分和第三部分中叙述,在Conclusion又重新总结了一下。
第二篇,论文中的主要Result写在Conclusion中。
第三篇,论文中的主要Result写在第3部分(3.CASESTUDIESANDRESULTS)中,Result和Conclusion是分开的。
第四篇,论文中的主要Result已第4部分的(IV.
ResultsandDiscussion)中进行叙述,Result和Conclusion是分开的。
第五篇,论文中的主要Result已第4部分的Resultsanddiscussion)(4.
中进行叙述,Result和Conclusion是分开的。
第1篇题目:
AnoverviewofNACA6-digitairfoilseriescharacteristicswithreferencetoairfoilsforlargewindturbinebladesIV.
ConclusionsThetwo-dimensionalaerodynamicscharacteristicsoftheNACA63and64six-digitseriesofairfoilsmeasuredintheNASALTPThavebeeninvestigated,withaviewtoverifyRFOILcalculationsathighReynoldsnumbers.
Thefollowingconclusionscanbedrawn
-Thezero-liftangleoftheNACA64-618airfoilneedstobeadjustedwith-0.4degrees.
-Thezero-liftangleofTheNACA63-615needstobecorrectedwith-0.87degreesinthesmoothcaseandwith+1degreeincaseofwraparoundroughness.
-ThemaximumliftcoefficientspredictedwithRFOILmatchtheLTPTdatawellatRe=3x106,butunderpredicttheCl,maxatRe=6x106by3.5%,upto6.5%atRe=9x106.
-ItisuncertainiftheestablisheddifferencesinliftbetweenexperimentandcalculationsarecausedbyaconstantbiasinthemeasurementsorbythefactthattheRFOILcodefailstopredicttherightlevelofmaximumlift.
-RFOILconsistentlyunderpredictsthedragcoefficient.
Thedifferenceisabout9%forawiderangeofairfoilsandReynoldsnumbers-NACAstandardroughnesscausesareductionintheliftcoefficientof18%to20%formostairfoilsfromtheNACA64series-Thezero-liftangleofairfoilNACA64-418withwrap-aroundroughnessneedsacorrectionof+0.54degrees.
-Windtunnelexperimentsandside-by-sidetestsinthefieldwithonecleanrotorneedtobedonetobeabletobetterpredicttheeffectsofroughness.
写作特点
内容:
第1句,概括了文章的的主要研究内容。
第2句至第8句逐条的列出了文章的得出结论。
使用了被动语态,Thetwo-dimensionalaerodynamicscharacteristicsoftheNACA63and64six-digitseriesofairfoilsmeasuredintheNASALTPThavebeeninvestigatedhavebeeninvestigated.
主要时态为一般现在时态第2篇题目
HIGH-LIFTENHANCEMENTUSINGACTIVEFLOWCONTROLV.
CONCLUSIONSThehigh-liftperformanceofanairfoilwithasingle-elementflapisenhancedsignificantlyusinganactiveflowcontrolsystemconsistingofspanwisefluidicactuatorsthatareintegratedneartheseparationpoint.
Spanwisearraysofspanwise-oscillatingornon-oscillatingjetsissuetangentiallytothelocalsurfacefromaminiaturedownstreamfacingsurfacestep.
Jetactuationleadstoflowattachmentofvaryingstreamwiseextentthatdependsonthejetmomentumcoefficientandtheformationofalowpressuredomainnearthejuncturebetweenthemainbodyandtheflap.
Asaresult,liftisincreasedsubstantially,byasmuchas?
CL=1.40,1.22and1.04atRec=6.7?
105,8.3?
105and1.0?
106,respectively,forα=4?
.
Inthepresentexperiments,threespanwiserowsoffluidicjetsareplacedinthevicinityofthejunctureandoperatedinvariousbinationsleadingtosignificantincreasesinlift.
Theupstream(x/c=0.59)andmiddle(x/c=0.61)actuators,whichareclosesttoseparation(x/c=0.62)aremosteffective,whilethedownstreamactuator(x/c=0.64)onlyproducesasignificantliftincrementwhenoperatedinconjunctionwithoneoftheotheractuators.
Thedegreeofflowattachmentincreaseswithjetmomentumcoefficientandsimultaneousoperationofmultipleactuatorscanincreasetheliftincrementfurtherevenwhentheflowisattached.
Actuationresultsinastrongsuctionpeaknearthejuncture(Cp~?
7.5)andalsoleadstoincreasesinsuctiononthemainbodyoftheairfoilandneartheleadingedge.
Theliftincrementismeasuredoverarangeofanglesofattack(0?
<
α<
12?
)andisacpaniedbyanincreaseinlift-inducedpressuredragandanincreaseinnose-downpitchingmoment.
Itisshownthatthehigh-liftperformancecanbeimprovedsignificantlybydesignmodificationsofthesurfaceinterfacebetweenthejetactuatorsandthesurroundingflow.
Inparticular,modifyingthejetorificesfroma“stepped”toa“recessed”configurationenhancestheinteractionofthejetswiththecrossflow,resultinginincreasedliftforagivenmomentumcoefficient,particularlyatlowerlevelsofC?
Therecesseddesignalsoreducesthelossinliftcausedbythepresenceoftheorificesandtheattachedflowexhibitssignificantlystrongersuctionpeaksneartheflapjunctureandtheleadingedge.
AtC?
=0.36%theupstreamactuatoryields?
CL=0.
and0.79forthesteppedandrecessed57configurations,respectively,andoperatingthebinationofupstreamandmiddleactuatorsatC?
=0.36%eachyields?
CL=0.78and0.92,respectively.
TheeffectoftheactuatorjetsontheattachedflowischaracterizedusingPIVmeasurementsoftheflowfieldovertheflapandadditionalhigh-magnificationmeasurementsinthevicinityoftheactuators.
Intheabsenceofactuation,theflowseparatesnearthejuncturebetweentheflapandthemainbody(x/c=0.62),formingarecirculatingdomainovertheflapandadetachedvorticitylayer.
Actuationleadstopleteflowattachmentthroughthetrailingedgewithsignificantaccelerationoftheflowwithintheattachedboundarylayerdownstreamoftheactuatorsandoutsideoftheboundarylayeralongmostoftheflap.
AtC=1.6%aninteractiondomaincontainingacross-streamvelocitypeak(~2.3timesthemaximumspeedofthejetunderquiescentconditions)isformedalongtheflapbetweentheactuatorjetandthefreestreamflowthatisparticularlyapparentusingtherecessedconfiguration.这篇文章的结论部分很特殊,统计的结果为565个单词,包含了4个段落。
第1段概括了文章的主要研究内容(activeflowcontrolsystem),第2段到第4段主要说明了文章的研究方法(experiment,PIV),以及一些具体的结果。
主要时态为一般现在时态第3篇题目
REPRESENTATIONMETHODEFFECTSONGENETICALGORITHMIN2-DAIRFOILDESIGNVIBRATIONAL4.
CONCLUSIONInthisarticle,BezierandParsecrepresentationmethodsaretestedintwodifferentflowconditions;
subsonicandtransonicflows.
InthefisttestcasebothrepresentationmethodsareparedviaVGAoptimizationtoolunderthesubsonicflowconditions.
TheparisonbetweenBezierandParsecrepresentationmethodsisshowninFig.
8.
ThisplotemphasizesthesuperiorityofParsecrepresentationmethod.
InthesecondtestcasebothrepresentationmethodsareparedviaVGAoptimizationtoolunderthetransonicflowconditions.
11.
ThisplotemphasizesthesuperiorityofBezierrepresentationmethod.
FromthesecasesitisconcludedthatParsecmethodismoreglobalandmoreefficientthanBeziermethodinsubsonicflows.
However,BeziermethodismoreflexiblethanParsecmethodwithintransonicflows.本篇文章相比于上篇文章内容上比较简短:
统计结果为134个单词,包含1个段落第1句,概括了文章的的主要研究内容。
第2句至第7句回顾了文章中的两个算例。
第8句说明了本文方法的优越性,最后一句说明了本文方法的不足。
主要时态为一般现在时态句型
Inthisarticle,TheparisonbetweenisshowninFig.
FromthesecasesitisconcludedthatHowever,第4篇题目
UnsteadyFlowSimulationofaHigh-LiftconfigurationusingaLatticeBoltzmannApproachV.
ConclusionsSimulationsofagenerichigh-liftgeometrywerecarriedoutusingtheLatticeBoltzmannbasedcodePowerFLOWwiththeframeworkofthe1stAIAACFDHighLiftPredictionWorkshopheldin20XX.
Theresultsshownhereweretheonlyunsteadysimulationsamongallworkshopparticipantsandshowexcellentagreementofdragandliftforcesaswellascpdistributionsforallworkshopcases.
GoodpredictionsintheregionofmaximumliftwereaparticularlydistinguishingfeatureoftheLatticeBoltzmannsimulations,indicatingtheimportanceofunsteadysimulationsincorrectlycapturingstronglyseparatedflowstructures.
Theslightover-predictionofcL,maxobservedforthebaselinecasewasshowntobelargelyattributabletotheabsenceofslatandflapbracketsinthesimulations.
Addingthesebrackets(Case3oftheworkshop)showsasignificantreductionofliftinparticularatthehigherangleofattack,bringingthesimulationresultstoalmostperfectagreementwithmeasuredresults.
Theeffectofchangingflapangleswasalsowellcapturedbythesimulations.
Thepositionoflaminar-to-turbulencetransitionwassetformostofthesimulationspresentedherebasedonpublishedexperimentalresultssincethemethodusedforthecurrentstudyusesawallmodelratherthanfullyresolvingtheboundarylayer.
Fullyturbulentsimulationswerecarriedoutforselectedconfigurationsandshowedasignificantreductionoflift.
Inadditiontotheworkshopcasesastudyofwindtunnelblockageeffectsisshownhere.
Addingwallsinthesimulationcorrespondingtothedimensionsofthewindtunnelledtoachangeofpredictedforcesconsistentwiththecorrectionsappliedtotheexperimentalresults.
ComputationaltimesrequiredfortheunsteadysimulationsweregenerallyinthesameorderofmagnitudeorevenslightlybelowastheRANSsimulationspresentedbyotherworkshopparticipants,confirmingthehighlevelofefficiencyoftheunsteadyLatticeBoltzmannmethod.
Overall,thismethodwasshowntobeaninterestingandviablealternativetothepredominantlyusedRANSmethodsforthesimulationofhigh-liftwings.本篇文章的结论也相对较长,统计结果为329个单词,包含4个段落第1段概括了文章的的主要研究内容。
第2段对文章中的使用的计算方法中的laminar-to-turbulencetransition进行了说明。
第3段文章中的使用的计算方法中的一点(Addingwallsinthesimulation)进行了说明。
第4段对文章的计算效率进行了说明。
进一步说明文章方法的优越性。
主要时态为一般现在时态第5篇题目
Designofanewurbanwindturbineairfoilusingapressure-loadinversemethod5.
ConclusionsApressure-loadinversedesignmethodwassuccessfullyappliedtothedesignofahigh-loadedairfoilforapplicationinasmallwindturbineforurbanenvironment.
Thepressuredistributionofthedesignedbladesectionshowsasmoothincreaseofthebladepressure-load,definedasthepressuredifferencebetweentheupperandthelowersidesofthesection,fromtheleadingedgeupto20%oftheaxialchord.
From20%upto80%oftheaxialchord,thepressure-loadisalmostconstantanditreducessmoothlytowardthetrailingedge.
Theexperimentaltestingofthenewbladesection,asanisolatedairfoil,confirmedthehighmaximumliftandamoderatedrag.
Futuredevelopmentswillconsidertheappl
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