CAJ | 학술논문

应用fluent软件，利用控制变量的方法，改变冲角和流速，对二维平板周围流态进行数值模拟仿真，揭示了二维平板在不同冲角及不同流速中周围流态的变化趋势：（1）平板置于定常流中，其两端会不断产生涡流，涡流会向后方漂移脱落，且前端产生的涡流中心速度大于后端产生的涡流中心速度；（2）平板后方形成的涡流中心流速随冲角的增大而增大，速度梯度更明显；平板前后端交替出现相反方向的涡流的现象更加明显和富有规律性；（3）流速（雷诺数）越大，涡流运动越剧烈，流线变化幅度越大，涡流中心间距越短。
응용fluent연건，이용공제변량적방법，개변충각화류속，대이유평판주위류태진행수치모의방진，게시료이유평판재불동충각급불동류속중주위류태적변화추세：（1）평판치우정상류중，기량단회불단산생와류，와류회향후방표이탈락，차전단산생적와류중심속도대우후단산생적와류중심속도；（2）평판후방형성적와류중심류속수충각적증대이증대，속도제도경명현；평판전후단교체출현상반방향적와류적현상경가명현화부유규률성；（3）류속（뢰낙수）월대，와류운동월극렬，류선변화폭도월대，와류중심간거월단。
By controlling variable and changing angle of attack and flow velocity, the numerical simulation study of flow status around two-dimension plate is carried out based on software Fluent. The variation tendency of flow status around the two-dimension plate with different angles of attack and flow velocities is showed as follows:(1)when plate is placed in steady current, there are vortexes generated from both ends, which will drift backward and then fall off. Center velocity of vortex generated from front end is greater than the one from back end;(2)the center velocity of vortex behind plate is increasing with the enlargement of angle of attack, meanwhile, velocity magnitude becomes more obvious, and the phenomenon that vortexes generate alternately from both ends with op-posite direction is more obvious and regular;(3)the larger the current velocity (Renolds number) is, the stronger the vortex movement is, the greater the variation amplitude of streamline is, the shorter the distance between center of vortex is.