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1、第38卷第4期航天返回與遙感2017年8月SPACECRAFTRECOVERY&REMOTESENSING47不同攻角下超聲速降落傘傘繩的影響研究1233薛曉鵬溫志湧汪運(yùn)鵬張德良(1中南大學(xué)航空航天學(xué)院,長(zhǎng)沙410083)(2香港理工大學(xué)深圳研究院,深圳518057)(3中國(guó)科學(xué)院力學(xué)所高溫氣體動(dòng)力學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室,北京100190)摘要文章基于一種簡(jiǎn)易“浸入邊界技術(shù)”與流固耦合方法對(duì)超聲速來(lái)流條件下的三維降落傘系統(tǒng)進(jìn)行了數(shù)值模擬。研究中,降落傘系統(tǒng)包括前體和傘體,兩者通過(guò)傘繩連接。文章的研究目的是分析不同攻角下降落傘傘繩對(duì)于降落
2、傘系統(tǒng)周圍復(fù)雜非定常流場(chǎng)的影響,以及對(duì)降落傘性能表現(xiàn)的影響。結(jié)果表明:在較小的前體和傘體距離下,由于攻角的影響,非定常流場(chǎng)結(jié)構(gòu)呈現(xiàn)上下不對(duì)稱,并且上下傘繩激波形成時(shí)間不同步。隨著攻角的增加,上下面的傘繩激波形成時(shí)間出現(xiàn)推遲,并且有變?nèi)醯内厔?shì)。另外,由于攻角與傘繩的綜合影響,傘內(nèi)表面的時(shí)間平均壓力分布在5o攻角時(shí)最小,而在10o攻角時(shí)最大,阻力系數(shù)卻隨著攻角的增加而增加。關(guān)鍵詞超聲速降落傘傘繩攻角數(shù)值模擬著陸中圖分類號(hào):V445文獻(xiàn)標(biāo)志碼:A文章編號(hào):1009-8518(2017)04-0047-08DOI:10.3969/j.is
3、sn.1009-8518.2017.04.006EffectsofSuspensionLinesontheSupersonicParachuteSystematDifferentAnglesofAttack1233XUEXiaopengWENChihyungWANGYunpengZHANGDeliang(1SchoolofAeronauticsandAstronautics,CentralSouthUniversity,Changsha410083,China)(2ShenzhenResearchInstitute,TheHong
4、KongPolytechnicUniversity,Shenzhen518057,China)(3TheStateKeyLaboratoryofHighTemperatureGasdynamics,InstituteofMechanics,ChineseAcademyofSciences,Beijing100190,China)AbstractInthepresentstudy,athree-dimensionalparachutesysteminsupersonicflowisnumericallysi-mulatedusing
5、asimple“immersedboundarytechnique”togetherwiththefluid-structurecouplingscheme.Theparachutesystememployedhereconsistsofacapsuleandacanopy,wherethesuspensionlinesareappliedtoconnectthem.Theobjectiveofthisstudyistoinvestigatetheeffectsofsuspensionlinesonthecomplexunstea
6、dyflowstructuresaroundtheparachutesystem,andtheperformanceofthesupersonicparachuteatdifferentanglesofattack.Asaresult,sincethedistancebetweenthecapsuleandcanopyisrathersmall,theaerodynamicinterac-tionsaroundtheparachutesystemexhibitmoreapparentasymmetricflow/shockfeat
7、ureswhentheangleofattackincreases,andthesuspensionlineshocksontheupper/lowersurfacesareformedatdifferenttime.Astheangleofattackisincreased,thesuspensionlineshocksarepostponedtoform,andbecomeweaker.Inaddition,becauseofthecouplingeffectsoftheangleofattackandsuspensionli
8、neshocks,thetime-averagedpressuredistributionon收稿日期:2016-12-1948航天返回與遙感2017年第38卷thecanopyinnersurfacebecomessmallestat5degre