| 摘要: |
| 根据特高速掺气水流所表现的可压缩性，利用连续方程和动量方程，并考虑水流粘滞性和脉动影响，将掺气水流当作单向流分析。水流流经不平整体时，其后可产生在掺气情况下仍不能消除的负压。此时，空化已不可避免，且随马赫数增加，掺气反而会使负压值增加，因而，将不再具有减蚀作用。 |
| 关键词: 掺气水流，空化，马赫数，特高速水流，接气 |
| DOI： |
| 分类号:TV131.34 |
| 基金项目:八五攻关和国家自然科学基金 |
|
| Effects of extra high-velocity aerated flow on cavitation |
|
Chat Gongchun
|
| Abstract: |
| his paper describes a preliminary analytical calculation of an extra high-velocity aerated flow made only in the light of the compressibility it exhibits. The aerated flow as a single-phase flow is analyzed by using the conventional continuity and momentum equations,taking into account the effects of flow viscosity and fluctuations. Results of the analysis indicates that in the case of flow past a wall surface with irregularities,very high negative pressures may occur behind the irregularities and that it is impossible to eliminate these pressure even when aeration is provided. As implied above, under such conditions cavitation is unavoidable, on the contrary aeration tends to cause increased negative pressures with increasing Mach nimber, thus no longer playing a role in cavitation inhibition. |
| Key words: aerated flow,caviattion,Mach number,extra high-velocity flow,aeration, |
