1,2,3，1,2,31.（交通大學工程力學系，3.（交通大學與千葉大學國際合作， 因此整個模型和厚度為0.2L。1。本文的運動波長為1，使蝌蚪以C型運動。1基金項目:國家自然科學基金項目 2.55π/s 0.875L、1L的數值模擬。圖5給出了對應的平均阻力系數和相對功率系數。 力系數Cd0組成了兩組交織的軌跡。負渦-V1在尾流中的運動已標注在圖中，-V11則是上一個周期中同一條蝌蚪脫落的負渦，可以看到明顯-V1向圖6上方運動。部，尾部正在向反向運動產生與此頭部渦相反的渦。在頭部渦影響下，細長的尾渦成一強一弱1.25Hz1.4Hz（2.5π/s2.8π/s）下0.5L、0.625L、0.75L、0.875L、1L8為并列反向位游動的的平均阻力2.8π/s0.75時阻力系數開始為負，即此時運動使蝌蚪整體產生向前的推力，并 力系數Cd00.5L時的渦量分布（9）0.5L時，頭部仍然產生了很強的頭部一個運動周期形成四個渦，是由原本的一對尾渦受頭部渦影響后產生的。1.275倍于來流速度時達到平衡。頭部產生了一對渦，沿蝌0.75L以內，阻力系數會迅速增大，伴隨著功率消耗的減少。雖然消耗1WassersugRJ,HoffK.Thekinematicsofswimminginanuranlarvae.J.exp.biol,1985,119:1-2DongG.J,LuX.Y.Characteristicsofflowovertravelingwavyfoilsinaside-by-sidearrangement.PHYSICSOFFLUIDS,2007,4LiuH,WassersugR,KawachiK.Thethree-dimensionalhydrodynamicsoftadpole 1997,200:2807-2819.1996,199:1245-1260NumericalstudyontheparallelswimmingofChen Hu(1DepartmentofEngineeringMechanics,ShanghaiJiaoTongUniversity,No.800DongchuanRoad,Shanghai200240,(2ShanghaiJiaoTongUniversityandChibaUniversityInternationalCooperativeResearchCenter,No.800DongchuanRoad,Shanghai200240,)（3MOEKeyLaboratoryofHydrodynamics,ShanghaiJiaoTongUniversity,No.800DongchuanRoad,Shanghai200240,Inthispaper,anumericalsimulationofsame-phaseandanti-phasetadpolesswimmingside-by-sideiscarriedout.Theresultiscomparedwithasingletadpolesswimming,andwiththeside-by-sideswimmingstreamlinebody.Thecharacteristicoftadpoleschoolingswimmingisrevealedbyyzingthedifferentdragcoefficientsandflowfieldsunderdifferentswimmingfrequencyanddistancethe andflowfields.Differentfromstreamlinedandobjectssuchasfish,tadpolesproducesastrongvortexaftertherearpartofhead,theheadvortexoftadpolesissignificantlyenhancedwhenthedistancebetweentadpolesdecreasing, ethemainfactorsaffectingtadpole.Andmaketheresultsignificantlydifferentfromstreamlineobject.Intheanti-phaseswimmingcondition,drag coefficientsincreases(thrustdecreases),whilepowerconsumptionreduces,whendistancebetweentadpolesdecreasesatrelativelyclosedistance.Atrelativelyfardistance,thrustandpowerconsumptionincreasewithdecreasingofdistancebetween