| 摘要: |
| 应用Standard fc-e，RNG fc-e和Standard fc-oj湍流模型对缩放型喷嘴内部湍流流场进行数值模拟，结合理论 及质量流量测试试验对数值模拟结果进行对比验证。结果表明:RNG A - e湍流模型最适合用于数值模拟缩放型喷 嘴内部的湍流流场;RNGfc-e湍流模型数值模拟结果显示缩放型喷嘴收缩角使喷嘴喉管部产生了低压场,压差的 产生使水射流的空化效果得到了提高。 |
| 关键词: 空化水射流 缩放型喷嘴 流场 数值模拟 流动特性 |
| DOI： |
| 分类号: |
| 基金项目:国家创新研究群体基金项目(50621403);重庆市杰出青年基金项目(CSTC2009BA6047)；新世纪优秀人才支持计划项目(NCET -06-0767) |
|
| Numerical simulation for cavitation water jet flow field through convergent-divergent nozzle |
|
LU Yi-yu, WANG Xiao-chuan, KANG Yong, CHEN YU-long
|
|
(College of Resources and Environmental Science，Chongqing University，Chongqing 400030，China )
|
| Abstract: |
| The turbulent field in a nozzle was numerically simulated by Standard k 一s，RNG k-s and Standard k-ay turbulent models. The constrast check for simulated results was done by combining the theory analysis and experiments of mass flow rates. The results show that the RNG k ~ e the most suitable model. The numerical simulation results of RNG k— e turbulent model show that the reduction angle of convergent-divergent nozzle has significantly influence on the parameters of jet flow field. It can form low pressure field in nozzle throat, and the pressure difference can improve the cavatition effect of high pressure water jet. |
| Key words: cavitation water jet convergent-divergent nozzle flow field numerical simulation flow property |
