| 引用本文: | 马晓冬,郭锐,刘荣忠,等.涡环旋转伞流固耦合特性分析.[J].国防科技大学学报,2015,37(1):84-89.[点击复制] |
| MA Xiaodong,GUO Rui,LIU Rongzhong,et al.Fluid-structure interaction characteristics analysis of vortex ring parachute[J].Journal of National University of Defense Technology,2015,37(1):84-89[点击复制] |
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| 涡环旋转伞流固耦合特性分析 |
| 马晓冬, 郭锐, 刘荣忠, 吕胜涛 |
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(南京理工大学 智能弹药技术国防重点实验室，江苏 南京 210094)
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| 摘要: |
| 以一种典型的涡环旋转伞为研究对象，采用任意拉格朗日-欧拉流固耦合方法模拟其在无限质量条件下的充气展开过程。计算得到了涡环旋转伞的充气展开和转速、开伞动载等时程变化曲线以及稳态阶段伞周围流场变化规律、伞衣织物的结构强度等流固耦合特性。结果表明：涡环旋转伞在来流12m/s时稳定转速约为3.1r/s，伞衣幅充满外形饱满，与伞塔试验结果吻合；稳态阶段涡环旋转伞上方产生大量涡核，涡核中心的连线类似于空间螺旋线；涡环旋转伞的阻力系数大于一般结构轴对称降落伞；伞衣幅与伞绳连接区域以及边缘区域应力明显高于伞衣幅平均应力水平。 |
| 关键词: 涡环旋转伞 充气展开 任意拉格朗日-欧拉方法 流固耦合 |
| DOI：10.11887/j.cn.201501014 |
| 投稿日期：2014-06-24 |
| 基金项目:国家自然科学基金资助项目（11102088）;江苏省研究生培养创新计划资助项目（CXLX12-0210） |
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| Fluid-structure interaction characteristics analysis of vortex ring parachute |
| MA Xiaodong, GUO Rui, LIU Rongzhong, LYU Shengtao |
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(National Defense Key Discipline Laboratory of Smart Ammunition Technology, Nanjing University of Science and Technology, Nanjing 210094, China)
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| Abstract: |
| Based on arbitrary Lagrange-Euler fluid-structure interaction method, the inflation process of a typical kind of vortex ring parachute in an infinite mass situation was simulated. The inflation process and the time-history changing curves of spinning rate and opening load were obtained, and the fluid-structure interaction characteristics at the steady stage, such as the change law of flow field around the canopy and the structural strength of the canopy fabrics, were analyzed. Results show that the stable spinning rate is about 3.1r/s and the canopy inflated shape is plump with the flow velocity of 12m/s, which are in good agreement with the tower test data. In steady state, there are a plenty of vortex cores above the parachute, and the ligature of the cores is similar to a spiral line. The drag coefficient of vortex ring parachute is greater than that of other typical parachutes with axial symmetry structure. The stress of the connected region of the canopy and the suspension lines and the canopy fringing field are obviously greater than the average stress of the canopy. |
| Keywords: vortex ring rotating parachute expansion inflation arbitrary Lagrange-Euler method fluid-structure interaction |
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