Numerical study on the transient behavior of water-entry supercavitating flow around a cylindrical projectile influenced by turbulent drag-reducing additives
Numerical study on the transient behavior of water-entry supercavitating flow around a cylindrical projectile influenced by turbulent drag-reducing additives
复制标题
湍流减阻添加剂影响圆柱弹丸周围入水超空泡流瞬态行为的数值研究
DOI：
10.1016/j.applthermaleng.2016.05.102
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发表时间：
2016-07
影响因子：
6.4
通讯作者：
Li, Feng-Chen
中科院分区：
文献类型：
--
作者：
Shuai, Zhi-Jun;Zhang, Xiang-Yuan;Li, Wan-You;Li, Feng-Chen
湍流减阻剂对入水超空泡流动非定常特性的影响是一个非常复杂的问题。本文试图介绍一种数值模拟程序来模拟粘性不可压缩两相和三相介质中的这类问题，分别。首先，我们进行了数值研究的入水超空泡在水中和湍流减阻解决方案，分别在28.4 m/s的冲击速度，以确认的数值方法的准确性。在此基础上，模拟了弹丸在142.7m/s相对高速（考虑相变）下的入水和湍流减阻问题。采用Cross粘度方程来表征减阻添加剂水溶液的剪切变稀特性。分别讨论了入水超空泡的形态和动力学特性、流动阻力和空泡边界径向速度。结果表明，数值模拟结果与实验数据吻合较好，验证了所建立的数值计算方法的正确性。数值结果表明，减阻溶液中的超空泡长度大于水中的超空泡长度;高撞击速度下的速度衰减比低撞击速度下快。湍流减阻添加剂具有增强超空泡和进一步减阻的潜力。
Simulation of the unsteady behavior of water-entry supercavitating flows influenced by turbulent drag-reducing additives is very complicated. This paper attempts to introduce a numerical simulation procedure to simulate such problems in viscous incompressible two-phase and three-phase media, respectively. Firstly we performed a numerical investigation on water-entry supercavities in water and turbulent drag-reducing solution, respectively, at an impact velocity of 28.4 m/s to confirm the accuracy of the numerical method. Based on the verification, projectile entering water and turbulent drag-reducing solution at relatively high velocity of 142.7 m/s (phase transition is considered) is simulated. The Cross viscosity equation was adopted to represent the shear-thinning characteristic of aqueous solution of drag-reducing additives. The configuration and dynamic characteristics of water-entry supercavity, flow resistance and the radial velocity of cavity boundary were discussed respectively. It was obtained that the numerical simulation results are in consistence with experimental data, verifying the established numerical procedures. Numerical results show that the supercavity length in drag-reducing solution is larger than that in water; the velocity attenuates faster at high impact velocity than at low impact velocity. Turbulent drag-reducing additives have the potential in enhancement of supercavitation and further drag reduction.
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影响因子：
3.9
作者：
Shanshan Xu;Y. Qiao;Xiaodong Liu;C. Church;M. Wan
通讯作者：
Shanshan Xu;Y. Qiao;Xiaodong Liu;C. Church;M. Wan
DOI：
10.1098/rsta.1900.0016
发表时间：
--
期刊：
Philosophical Transactions of the Royal Society B
影响因子：
--
作者：
A. M. Worthington;R. S. Cole
通讯作者：
A. M. Worthington;R. S. Cole
影响因子：
2.4
作者：
M. Mehrabadi;K. Sadeghy
通讯作者：
M. Mehrabadi;K. Sadeghy
DOI：
10.2478/v10254-012-0010-3
发表时间：
2012-06
期刊：
--
影响因子：
--
作者：
R. Panahi
通讯作者：
R. Panahi
影响因子：
2.4
作者：
Lili Feng
通讯作者：
Lili Feng