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1、2014年12月北京航空航天大學(xué)學(xué)報(bào)December2014第40卷第12期JournalofBeijingUniversityofAeronauticsandAstronauticsV01.40No.12質(zhì)心位置對(duì)超空泡射彈尾拍運(yùn)動(dòng)影響分析趙成功王聰魏英杰馬慶鵬(哈爾濱工業(yè)大學(xué)航天學(xué)院,哈爾濱150001)摘要:基于均質(zhì)平衡流理論,通過(guò)求解混合介質(zhì)的RANS(Reynolds.AveragedNavi.er—Stokesequations)方程、SST(ShearStressTransport)湍流方程和不同介質(zhì)之間的質(zhì)量輸運(yùn)方程,結(jié)合剛體運(yùn)動(dòng)方程和網(wǎng)格變形方法,
2、研究了不同質(zhì)心位置的超空泡射彈尾拍運(yùn)動(dòng)特性以及尾拍運(yùn)動(dòng)下超空泡形態(tài)特性,對(duì)比分析了不同質(zhì)心位置的超空泡射彈尾拍運(yùn)動(dòng)的剛體運(yùn)動(dòng)和尾拍力的變化特征.結(jié)果表明,射彈尾拍運(yùn)動(dòng)對(duì)空泡形態(tài)的對(duì)稱性有較大影響,發(fā)生碰撞處的空泡壁面朝著彈體轉(zhuǎn)動(dòng)的方向發(fā)展;射彈尾拍運(yùn)動(dòng)的轉(zhuǎn)動(dòng)角度、角速度、角加速度以及尾拍阻力和尾拍升力等都表現(xiàn)出周期性變化規(guī)律,且隨著質(zhì)心與射彈頭部距離的增加,轉(zhuǎn)動(dòng)慣量增大,變化周期也增大.關(guān)鍵詞:多相流;超空泡射彈;尾拍運(yùn)動(dòng);質(zhì)心位置;尾拍力中圖分類號(hào):0351文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1001-5965(2014)12.1754-07Analysis0ftheeffe
3、ctofmasscenterpositionontailslap0fsupercaVitatingprojectileZhaoChenggongWangCongWeiYingjieMaQingpeng(SchoolofAstronautics,HarbinInstituteofTechnology,Harbin150001,China)Abstract:Thenumericalsimulationofthecavitymorphologyinsupercavitatingprojectiletailslapwasstudiedandtherigidbodymotio
4、nparametersandtail—slappingforcesvariationswerecomparativelyanalyzedunderdifferentmasscentrepositionsofthesupercavitatingprojectile,basedonthetheoryofhomogeneousequilibriumflows,bysolvingtheReynolds—averagedNavier.Stokesequations(RANS)ofmixturefluid,shearstresstransport(SST)turbulencet
5、ransportequationsandthemasstransportequationsbetweeneachphase.combinedwithrigidbodymotionequationsandmeshdeformationmethod.TheresuItshowsthatthetail.slap.pingofthesupercavitatingprojectiledestroysthesymmetryofcavitymorphology,thecavitywalloftheimpactpositiondevelopsalongthedirectionoft
6、heprojectilemotion;therotationangle,angularvelocity,angularac.celerationandtailslapforcechangeperiodically,andwiththecentroidpositionawayfromtheheadofthepro.jectile,thelargerthemomentofinertia,thegreatertheperiod.Keywords:multiphaseflow;supercavitatingprojectile;tailslap;masscentreposi
7、tion;tail.slappingforce航行體在水下高速運(yùn)動(dòng)時(shí),其表面附近的水因?yàn)榈蛪憾l(fā)生空化現(xiàn)象.當(dāng)航行體速度很高時(shí),空泡會(huì)完全包裹航行體,形成超空泡‘1
8、.超空泡的形成使得航行體在水下運(yùn)動(dòng)的阻力明顯減小,從而可大幅度提高航行體的水下航行速度‘21.當(dāng)超空泡射彈在水中運(yùn)動(dòng)時(shí),任何微小的擾收稿13期:2014-01-14;網(wǎng)絡(luò)出版時(shí)間:2014-05-2915:28;DOI:10.13700/j.bh.1001-5965.2014.0014網(wǎng)絡(luò)出版地址:WWW.cnki.net/kcms/doi/lO.13700/j.bh.1001-5965.2014.