資源描述:
《射流角度對(duì)平板橫向射流的影響》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、2013年9月北京航空航天大學(xué)學(xué)報(bào)September2013第39卷第9期JournalofBeijingUniversityofAeronauticsandAstronauticsV01.39No.9射流角度對(duì)平板橫向射流的影響吳盟額日其太王猛杰杜江毅(北京航空航天大學(xué)能源與動(dòng)力工程學(xué)院,北京100191)摘要:采用數(shù)值和試驗(yàn)方法研究了射流角度對(duì)平板橫向射流流動(dòng)結(jié)構(gòu)和工作特性的影響,將得出的規(guī)律應(yīng)用于射流控制矢量噴管上.在小型風(fēng)洞試驗(yàn)臺(tái)上進(jìn)行試驗(yàn),用紋影方法來觀察實(shí)驗(yàn)?zāi)P偷牧鲌?chǎng)結(jié)構(gòu),通過靜壓測(cè)點(diǎn)來測(cè)量實(shí)驗(yàn)?zāi)P偷谋诿鎵毫Γ芯拷Y(jié)果表明:數(shù)值與試驗(yàn)結(jié)果吻合
2、較好;對(duì)平板橫向射流,增大射流角度能增大射流上游的分離區(qū),弓形激波位置更靠前,角度增加到一定大小,流場(chǎng)結(jié)構(gòu)變化不再明顯;對(duì)射流控制矢量噴管進(jìn)行數(shù)值模擬得出,增大射流角度能有效提高噴管的推力矢量性能,在NPR為4.6,SPR為0.7條件下,射流角度從90。增加到130。,推力矢量性能提高28.3%.關(guān)鍵詞:橫向射流;流體控制;推力矢量;射流角度;紋影中圖分類號(hào):V231.1文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1001—5965(2013)09—1254-05EffectsofjetinjectionangleinaflattransverseflowWuMengEri
3、qitaiWangMengjieDuJiangyi(SchoolofEnergyandPowerEngineering,BeijingUniversityofAeronauticsandAstronautics,Beijing100191,China)Abstract:Thecomputationalandexperimentalstudieswereconductedtoinvestigatetheeffectsofthejetinjectionangleontheflatflowstructureanditsoperatingcharacterist
4、ics,theconclusionsweremadetoapplyonthefluidiccontrolvectoringnozzle.Theexperimentswereperformedinasmallwindtunneltestbed.Theschlierenmethodwasusedtoobservetheflowstructureandthewallpressuredistributionofthetestmodelwasmeasuredbythestaticpressuremeasuringpoint.Theresultsshowthatth
5、ecomputationalandexperimentalre—suhsareingoodagreement.Increasingthetransverseinjectionanglecanimprovethejetupstreamofthesepa—rationzone,andmakethebowshockpositionclosertothetop.However,thechangeoftheflowstructureisnolongerobviouswhenthetransverseinjectionanglebigenough.Thenumeri
6、calsimulationoffluidiccontrolvectoringnozzleindicatesthattheincreaseofthetransverseinjectionanglecanimprovethethrustvectoringperformanceeffectively.Tobespecific.thethrustvectoringperformanceraisesby28.3%whenthetransverseinjectionanglechangefrom90。to130。,ontheconditionsthatNPRequa
7、led4.6andSPRequaled0.7.Keywords:tansverseinjection;fluidiccontrol;thrustvectoring;injectionangle;schlieren推力矢量控制技術(shù)通過控制發(fā)動(dòng)機(jī)尾噴流方向來控制飛機(jī)機(jī)動(dòng)飛行,它可補(bǔ)充或取代常規(guī)飛行控制面產(chǎn)生的氣動(dòng)力來對(duì)飛機(jī)進(jìn)行飛行控制.大量研究表明,采用推力矢量控制技術(shù)能實(shí)現(xiàn)過失速機(jī)動(dòng),改進(jìn)飛機(jī)性能和機(jī)動(dòng)性,縮短起落滑跑距離,減小飛機(jī)阻力和重量,從而提高飛機(jī)的作戰(zhàn)效能和生存力,降低其全壽命周期成本¨。3。.推力矢量控制技術(shù)的核心是矢量噴管,主要包括機(jī)械調(diào)節(jié)式
8、矢量噴管和射流控制矢量噴管.機(jī)械式矢量噴管由于其復(fù)雜的作動(dòng)部件和管壁結(jié)構(gòu),增加了