Simulation on Hydrodynamics of Supercavitation Vehicle
-
摘要: 超空泡航行器在水下运动时,其大部分表面被超空泡包裹,构成了一种新的流体动力布局,运动模式完全不同于常规航行器,其受力状态也极其复杂,这种新的流体动力是非线性的。为了进一步分析超空泡流场中航行器的受力特性,需要对其流体动力进行线性化处理。本文描述了超空泡形态,讨论了影响超空泡变形的主要因素,对超空泡流场中航行器的滑行力和空化器升力做了分析和线性化处理。仿真结果表明,滑行力和空化器升力在一定范围内是线性的,利用经线性化的力可进一步分析航行器的运动特性。Abstract: The major partial surfaces of supercavitation vehicle are wrapped by the bubbles of supercavitation, which forms a new hydrodynamic distribution as the vehicle running in water. Therefore, the vehicle′s motion mode is fully different from conventional one with complicated force state and nonlinear hydrodynamic force. To analyze the force characteristics of the vehicle, it is necessary to linearize the planing force and cavity lift. This paper describes the shape of cavity, discusses the major parameters affecting cavity shape, analyzes and linearizes the planing force and cavity lift. Simulation results show that the forces are linear within a certain scope. The motion characteristics of the vehicle can be analyzed further by using these linearized forces.
-
Key words:
- supercavitation /
- multiphase flow /
- hydrodynamic /
- planing force /
- cavity lift
-
[1] 赵卫.超空泡高速鱼雷技术综合分析.黑龙江:哈尔滨工业大学,2005. [2] 傅金祝.超空泡--对未来水中兵器系统的挑战.水雷战与舰船防护,2002(2):22-27. [3] 傅慧萍,鲁传敬,冯学梅.超空泡武器技术中的几个水动力问题.船舶力学,2003,7(5):112-118. [4] Savchenko Y N.Supercavitation-Problems and Perspectives//4th International Symposium on Cavitation.California,California Institute of Technology,Cav2001:Session B3.003. [5] Goel A.Robust Control of Supercavitating Vehicles in the Presence of Dynamic and Uncertain Cavity.Thesis of the University of Florida,2005. [6] 袁绪龙,等.水下航行体通气超空泡非对称性研究.力学学报,2004,36(2):146-150. [7] Logvinovich G V.Some Problems in Planing and Cavitation.Kyiv.Trudy TsAGI.1980. [8] Paryshev E V.Mathematical Modeling of Unsteady Cavity Flows//Proceedings of Fifth International Symposium on Cavitation.Osaka,Japan,2003:CAV 03-OS-7-014.
点击查看大图
计量
- 文章访问数: 2025
- HTML全文浏览量: 1
- PDF下载量: 780
- 被引次数: 0