学术论文

      滑跃式甲板气流场数值模拟

      Numerical simulation of airwake around ski jump decks

      摘要:
      利用FLUENT软件对舰船进行数值模拟,与已有风洞实验数据对比分析,验证数值模拟的准确性.针对滑跃式舰船甲板,讨论不同网格形式对计算结果的影响,发现棱柱层网格可以改善计算过程的收敛特性,提高收敛速度,沿甲板边界的网格细化是采集船首和边界涡产生的关键.通过对全尺寸的滑跃式甲板舰船船型的计算,得到船首分离涡和岛型建筑后面复杂的涡旋结构.结果表明:岛型建筑分离涡计算的准确度直接影响了岛型建筑下游流场的整体特征;船体尺寸和岛形建筑的形状和位置会严重影响船后涡旋的强度和位置.
      Abstract:
      To simulate numerically airwake around ski jump decks, the LHA (landing helicopter as- sault) ship was calculated by FLUENT. The accuracy of numerical simulation was verified by the ex- perimental data in wind tunnel. Three different grids were generated to analyze the influence of the prismatic layer grid. The results show that, the presence of prismatic layer grid does not affect the re- sults. Grid refinement along the edges of the ship deck shape is critical to capture the generation of bow and edge vortices. With calculating the full-size aircraft carrier ship, the complex evolution of vortices in the ship deck airwake field is found. For separating vortex from superstructure, the accu- racy of calculation affects the overall characteristics of the downstream flow field. The overall size of the deck shape and the location of the superstructure affect the intensity and the location of the vorti- ces behind the deck.
      作者: 刘长猛 郜冶
      作者单位: 哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨,150001
      年,卷(期): 2012, 40(10)
      分类号: U674.771
      机标分类号: TP2 U66
      在线出版日期: 2012年12月21日
      基金项目: 国家自然科学基金资助项目