水下高速燃气射流及复杂波系二维数值仿真

侯子伟; 黄孝龙; 李 宁; 翁春生

doi:10.11993/j.issn.2096-3920.2020.01.010

水下高速燃气射流及复杂波系二维数值仿真

doi: 10.11993/j.issn.2096-3920.2020.01.010

南京理工大学瞬态物理国家重点实验室, 江苏南京, 210094

基金项目: 中央高校基本科研业务费专项资金资助(30919011258).

详细信息

通讯作者:
翁春生(1964-), 男, 教授, 博士生导师, 主要研究方向为水下推进技术.

中图分类号: TJ630.32; O358
计量
- 文章访问数: 301
- HTML全文浏览量: 1
- PDF下载量: 145
- 被引次数: 0
出版历程
- 收稿日期: 2019-07-09
- 修回日期: 2019-08-05
- 刊出日期: 2020-02-29

Two-Dimensional Numerical Simulation of Underwater High-Speed Gas Jet and Complex Wave System

National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing, 210094

摘要

摘要: 文中针对水下高速燃气射流的形成与发展问题, 基于Euler双流体模型和时-空守恒元解元方法, 建立了射流管高速高压射流在自由水域中的喷射模型, 对水下射流管外流场进行了气液两相数值仿真, 研究了射流的形成和发展过程, 以及射流初期的流场特性, 分析了水下高速燃气射流喷射过程中出现的复杂波系及形态, 并初步讨论了射流内部的“回击”现象。研究结果表明: 水下燃气射流在高速喷出后, 由于水的阻滞作用, 流场呈现出轴向发展较慢、径向扩张迅速的特征; 燃气前沿高压区内形成前导激波、反射激波和拦截激波互相交叉的复杂波系; 复杂波系间的相互作用使射流不断向下游发展的同时出现轴向内凹的形态, 且射流主体界面呈现不规则形状; 射流在传播过程中会产生气体回溯现象并使射流中出现“钻石型”形态。文中对波系传播和相互作用引起射流管出口流场压力复杂变化的研究, 可为水下发动机工作性能的提高提供一定参考。
- 水下发动机 /
- 燃气射流 /
- 双流体模型 /
- 时-空守恒元解元方法 /
- 复杂波系
Abstract: Aiming at the generation and development of underwater high-speed gas jet, based on the Euler two-fluid model and the space-time conservation element and solution element(CE/SE) method, a model of jet with high speed and high pressure in free water is established, and the gas-liquid two-phase numerical simulation of the external flow field of underwater nozzle is carried out to analyze the flow field characteristics of initial jet, as well as the complex wave systems and shapes in the process of underwater high-speed gas jet injection. And the phenomenon of “hitting back” inside the jet is preliminarily discussed. The results show that the flow field presents slow axial development and rapid radial expansion due to the blocking effect of water after the underwater gas jet injection at high speed. A complex wave system in which the leading shock wave, the reflected shock wave and the intercept shock wave cross each other is formed in the high pressure zone of the gas front. The interaction of complex wave systems makes the jet develop downstream continuously with an axial concave shape, and irregular shape of the main jet interface appears. The gas retrospecting phenomenon occurs in the process of jet propagation, which leads to the “diamond” shape in the jet. The complex change of the flow field pressure at nozzle outlet caused by propagation of wave systems and their interaction has an important effect on the propulsion performance of underwater engines.
- underwater engine /
- gas jet /
- two-fluid model /
- space-time conservation element and solution element(CE/SE) /
- complex wave system

HTML全文

参考文献(13)

[1]	Frolov S M, Avdeev K A, Aksenov V S, et al. Experimental and Computational Studies of Shock Wave-to-bubbly Water Momentum Transfer[J]. International Journal of Multiphase Flow, 2017, 92: 20-38.
[2]	Yagla J J, Busic J, Koski S, et al. Launch Dynamics En-vironment of a Water Piercing Missile Launcher[J]. Journal of Hepatology, 2013, 52(10): S406.
[3]	Ma D, Liu M, Zu Y, et al. Two-dimensional Volume of Fluid Simulation Studies on Single Bubble Formation and Dynamics in Bubble Columns[J]. Chemical Engineering Science, 2012, 72: 61-77.
[4]	Nabavi M, Siddiqui K, Chishty W A. 3-D Simulations of the Bubble Formation from a Submerged Orifice in Liquid Cross-Flow[C]//Asme 2009 Fluids Engineering Division Summer Meeting, 2009-Vail. Colorado, USA: ASME, 2009.
[5]	张春, 郁伟, 王宝寿. 水下超声速燃气射流的初期流场特性研究[J]. 兵工学报, 2018, 39(5): 961-968. Zhang Chun, Yu Wei, Wang Bao-shou. Research on the Initial Flow Field Characteristics of Underwater Supersonic Gas Jets[J]. Acta Armamentarii, 2018, 39(5): 961- 968.
[6]	曹嘉怡, 鲁传敬, 李杰, 等. 水下超声速燃气射流动力学特性研究[J]. 水动力学研究与进展, 2009, 24(5): 575-582. Cao Jia-yi, Lu Chuan-jing, Li Jie, et al. Research on Dyn- amic Characteristics of Underwater Superasonic Gas Jets[J]. Journal of Hydrodinamics, 2009, 24(5): 575-582.
[7]	汤龙生, 刘宇, 吴智锋, 等. 水下超声速燃气射流气泡的生长及压力波传播特性实验研究[J]. 推进技术, 2011, 32(3): 417-420. Tang Long-sheng, Liu Yu, Wu Zhi-feng, et al. Experime- ntal Study on Characteristics of Bubble Growth and Pressure Wave Propagation by Supersonic Gas Jets Under Water[J]. Journal of Propulsion Technology, 2011, 32(3): 417-420.
[8]	贾有军, 张胜敏, 尤俊峰, 等. 固体发动机水下点火尾流变化过程试验研究[J]. 固体火箭技术, 2015, 38(5): 660-663, 678. Jia You-jun, Zhang Sheng-min, You Jun-feng, et al. Experimental Research on the Changing Process of Underwater Ignition Wake of Solid Rocket Motor[J]. Journal of Solid Rocket Technology, 2015, 38(5): 660-663, 678.
[9]	Liu J T, Chu N, Qin S J, et al. Numerical Simulations of Bubble Formation and Acoustic Characteristics from a Submerged Orifice: The Effects of Nozzle Wall Configurations[J]. Chemical Engineering Research and Design, 2017, 123(1): 130-140.
[10]	Zhang X, Yu Y, Zhou L. Numerical Study on the Multiphase Flow Characteristics of Gas Curtain Launch for Underwater Gun[J]. International Journal of Heat and Mass Transfer, 2019, 134: 250-261.
[11]	周帏, 翁春生. PDE出口爆轰波与射流诱发水中流场变化规律的数值仿真[J]. 水下无人系统学报, 2017, 25(2): 167-173. Zhou Wei, Weng Chun-sheng. Numerical Simulation of the Underwater Flow Field Induced by Detonation Wave and Jet from Pulse Detonation Engine Outlet[J]. Journal of Unmanned Undersea Systems, 2017, 25(2): 167-173.
[12]	张焕好, 郭则庆, 王瑞琦, 等. 水下超声速气体射流的初始流动特性研究[J]. 振动与冲击, 2019, 38(6): 88-93, 131. Zhang Huang-hao, Guo Ze-qing, Wang Rui-qi, et al. Initial Flow Characteristics of an Underwater Supersonic Gas Jet[J]. Journal of Vibration and Shock, 2019, 38(6): 88-93, 131.
[13]	马丹花, 翁春生. 二维守恒元和求解元方法在两相爆轰流场计算中的应用[J]．燃烧科学与技术, 2010, 16(1): 85-91． Ma Dan-hua, Weng Chun-sheng. Application of Two- Dimensional CE/SE Method to Calculation of Two-Phase Detonation Flow Field[J]. Journal of Combustion Science and Technology, 2010, 16(1): 85-91.