初生空化状态相似性问题
Similarity Problem of Inceptive Cavitation
-
摘要: 在前文中[1],讨论了热力学条件与初生空化的关系.在此基础上,引进空泡群的体积函数z0(r),代替前文中的能量方程式,讨论相似流动体系中的空化状态相似性问题.分析结果表明,在两个满足Froude准则的相似流动体系中,空化状态是不相似的,其初生空化数随几何比尺的增加而增加.理论结果与实践是符合的.Abstract: In the preceding article[1], the relation between thermodynamics condition and inceptive cavitation stage has been discussed. In this paper, we try to introduce the volume function of inceptive cavitation bubbles, z0(r), instead of the energy equation used in the reference [1],for discussing cavitation similarity problem in similar flow systems. Under this condition, theoretical result shows that the inception cavitation number Ki increases with a rise of geometry linear scale. In other words, if two flow systems are kept with similar pattern and liquid, it is impossible to satisfy the cavitation similarity. This conclusion accords with practice.
-
[1] 蔡树棠、刘一心,热力学理论与空化现象,应用数学和力学,4,6(1983年11月),737-742
点击查看大图
计量
- 文章访问数: 1728
- HTML全文浏览量: 38
- PDF下载量: 585
- 被引次数: 0