CAJ | 학술논문

　　壁面脉动压力是湍流非定常特性的重要表征，而且是重要的流体动力声源，所以对于脉动压力的研究已经成为流声耦合研究领域的重要课题。文章采用大涡模拟方法结合动态Smagorinsky亚格子涡模型，数值计算了两型翼/板结合部在不同流速下的湍流脉动压力，并展示了结合部马蹄涡流动结构。通过将计算结果与试验结果进行对比分析可知，数值计算方法能准确地预报湍流脉动压力，从而为理解翼/板结合部非定常流动的物理机理奠定了基础。
　　벽면맥동압력시단류비정상특성적중요표정，이차시중요적류체동력성원，소이대우맥동압력적연구이경성위류성우합연구영역적중요과제。문장채용대와모의방법결합동태Smagorinsky아격자와모형，수치계산료량형익/판결합부재불동류속하적단류맥동압력，병전시료결합부마제와류동결구。통과장계산결과여시험결과진행대비분석가지，수치계산방법능준학지예보단류맥동압력，종이위리해익/판결합부비정상류동적물리궤리전정료기출。
Wall Pressure Fluctuations (WPF) represent the unsteady feature of turbulence. It is a significant hydrodynamic acoustic source. The study of WPF has become vigorous in the field of flow-acoustic cou-pling. The wall pressure fluctuations of wing/plate junctions (two shapes) under different velocities are sim-ulated numerically by large eddy simulation with dynamic Smagorinsky subgrid model. And the horse-shoe vortical field around wing/plate junction is captured and displayed. It shows that the computed wall pres-sure fluctuations agree well with experimental measurements. And the numerical computation approach for WPF is validated. These works are beneficial for understanding the physical mechanism of unsteady flow around wing/plate junction.