摘要
为了在低速下获取形态可控有效减阻的通气超空泡,利用中速可持续通气空泡水洞开展了空化器参数对通气超空泡形态影响的研究。研究结果表明:空化器直径与通气超空泡的形态密切相关,在相同流场参数条件下,较大直径的空化器易于空化且在较低的通气率下即可形成较大的通气超空泡;通气超空泡的优良率与空化器直径密切相关;不易选取空化器直径与模型后体直径比值Dn/D<0.263的空化器;空化器线形同样也是一个重要的参数,例如,在相同流场参数条件下,平头倒角形空化器比圆锥形空化器形成的超空泡尺寸大,对于圆锥形空化器,锥角越小越不易产生通气超空泡。此外,还将圆盘形空化器超空泡形态的试验结果与理论结果进行了比较,其总的规律是相一致的。
In order to get a perfect ventilated supercavity with controllable shape and reducible drag, the experiments have been done in a ventilated cavitation tunnel to study the relationship between the cavitator parameters and the ventilated supercavity shape. Experimental results showed that the cavitator diameter plays an important role on the ventilated supercavity developing. Under the same conditions of the fluid parameters, the bigger the cavitator diameter is, the easier the cavitation is and the bigger the ventilated supercavity size becomes. Fineness ratio of ventilated supercavity is closely related to cavitator diameter. The ratio of cavitator diameter to the attached body diameter Dn/D〈0.263 is unfit for choice. The contour of cavitator is also an important parameter, for instance, under the same conditions of the fluid parameters the blunt reverse angle cavitator is easier to form supercavity than conic cavitator, and the conic cavitator with the smaller cone angle is much harder to form ventilated supercavity than the one with a bigger cone angle. Besides, the experimental results of disk cavitator have been compared with theoretical results in the paper, and the main patterns agree.
出处
《工程力学》
EI
CSCD
北大核心
2007年第3期159-164,共6页
Engineering Mechanics
关键词
空化器直径
空化器线形
通气超空泡
通气流量
水洞实验
cavitator diameter
cavitator contour
ventilated supercavity
ventilation flow rate
water tunnel experiment
作者简介
贾力平（1977），女，河北邯郸人，博士生，从事超空泡流体力学理论及试验研究（E—mail：lena3333@163．com）：
王聪（1966），男，内蒙古呼和浩特人，副教授，博士，从事航天器动力学、振动与控制，流体力学等研究：
于开平（1968），男，黑龙江哈尔滨人，教授，博士，主要从事水下航行体的超空化减阻理论与试验技术：
魏英杰（1975），男，黑龙江大庆人，副教授，博士后，从事流体力学数值模拟、超空泡流理论与试验研究：
王海斌（1976），男，河北邯郸人，博士生，从事超空泡数值仿真及试验研究：
张嘉钟（1945），男，黑龙江哈尔滨人，教授，硕士，从事航天器动力学、机械故障诊断，流体力学等研究。
