CAJ | 학술논문

潜艇脉动压力与流激噪声的数值预报与分析已经成为流声耦合研究领域的重要课题。文章对于潜艇围壳进行了前缘加装填角以及三维座舱型围壳的线型优化，并采用大涡模拟与声学类比方法对于原围壳、带填角围壳与三维围壳的涡旋流场（马蹄涡）和声学特征进行了数值计算评估，分析了围壳线型优化对于壁面脉动压力和流激噪声的定量影响与抑制效果，研究表明直立型围壳加装填角或者进行三维流线型设计，可以明显改善围壳区域特别是围壳与艇体交接部的流动品质，使得脉动压力与流激噪声显著下降。文中工作有益于潜艇流声耦合学术研究以及未来新型潜艇设计。
잠정맥동압력여류격조성적수치예보여분석이경성위류성우합연구영역적중요과제。문장대우잠정위각진행료전연가장전각이급삼유좌창형위각적선형우화，병채용대와모의여성학류비방법대우원위각、대전각위각여삼유위각적와선류장（마제와）화성학특정진행료수치계산평고，분석료위각선형우화대우벽면맥동압력화류격조성적정량영향여억제효과，연구표명직립형위각가장전각혹자진행삼유류선형설계，가이명현개선위각구역특별시위각여정체교접부적류동품질，사득맥동압력여류격조성현저하강。문중공작유익우잠정류성우합학술연구이급미래신형잠정설계。
Numerical simulation of wall pressure fluctuations and flow induced noise of submarine has be-come vigorous in the field of flow-acoustic coupling. The fairwater of a submarine is optimized by two shapes, one is the fairwater with fillet, and another is three-dimensional canopy-like fairwater. Numerical investigation by LES and acoustic analogy is carried out to analyze the vortical flow fields (horse-shoe vor-tex) and acoustic characteristics of the three fairwaters, and the effect of optimization is studied to describe the quantitative change of pressure fluctuations and flow induced noise. This study shows that the optimiza-tion of fairwater is able to improve the flow quality around fairwater especially in the junction of fairwater and hull, and the wall pressure fluctuations and flow induced noise can be suppressed obviously. The work is beneficial to the research in the field of flow-acoustic coupling and the design of the submarine with a new type.