摘要
文章基于CFD技术和水洞试验,对超空化航行体通气装置外径尺寸对空化流场的影响进行了研究。数值计算结果表明:航行体的前部外径对航行体超空泡的生成和形态有重要影响,若Rw取值偏大将会使空化流场出现空化不连续现象,甚至改变超空泡的脱体边界。文中以数值计算结果为依据,建立了航行体超空泡可以正常生成的航行体前部外径最大临界值公式。同时设计了三个航行体头部模型在水洞实验室进行了实验研究,实验结果验证了所建立公式的正确性,文中结论为进一步研究人工通气超空化奠定了基础。
To our knowledge,there is no paper in the open literature on the above-given title.Sections 1 through 4 of the full paper present the results of our exploration.Sections 1,2 and 3 use CFD（computational fluid dynamics） to do our explorative work.Section 1 presents the mathematical model of supercavitational flow.Section 2 gives Figs.1 and 2 to show the geometrical model of a supercavitating vehicle.The core of section 3 consists of：（1） we give eq.（5） for calculating the critical diameter size of the ventilation device;（2） the CFD results,given in Figs.4 and 5,Tables 1,2 and 3,and their analysis indicate preliminarily that,for the large diameter size of a ventilation device,the supercavitation shape is discontinuous and it even changes its off boundary.Section 4 designs three types of typical ventilation devices and carries out verificational experiments in the NWPU high-speed water tunnel.The experimental results,presented in Figs.6,7 and 8,and their analysis indicate preliminarily that eq.（5） for the design of the ventilation device is correct.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2010年第6期834-839,共6页
Journal of Northwestern Polytechnical University
关键词
超空泡
超空泡航行体
通气装置
计算流体力学
cavitation
computational fluid dynamics
supercavitating vehicle
ventilation device
