气相流约束调控微细水射流的数值仿真

郭春海; 张文武; 茹浩磊

doi:10.11858/gywlxb.2017.05.012

气相流约束调控微细水射流的数值仿真

doi: 10.11858/gywlxb.2017.05.012

中国科学院宁波材料技术与工程研究所，浙江宁波 315201

基金项目:

宁波市自然科学基金 2015A610095

宁波市自然科学基金 2015A610106

详细信息

作者简介:
郭春海(1980—)，男，博士，高级工程师，主要从事计算流体力学及数值传热学研究.E-mail：guochunhai@nimte.ac.cn

中图分类号: O357.1
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出版历程
- 收稿日期: 2016-11-01
- 修回日期: 2017-01-12

Numerical Simulation of High Pressure Micro Water Jet Modulation with the Constraint of Gas Flow

Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

摘要

摘要: 针对高压微细水射流的喷嘴磨损严重和分辨率很难进一步提高的问题，给出了一种新的射流方案，即气相流约束调控下的微细水射流。通过数值模拟的方法，对该射流方案的射流过程进行研究，并得到了气相流约束下微细水射流的流场分布。研究结果表明，该射流方案是可行的，能有效地减小射流喷嘴的磨损，以及进一步提高微细水射流的分辨率。
- 高压微细水射流 /
- 气相流约束 /
- 数值模拟 /
- 喷嘴磨损
Abstract: The high pressure micro water jet nozzle is often seriously worn and its resolution is difficult to further improve.To address this problem, a new method of the micro water jet under the constraint of the gas flow was presented in this paper.Using numerical simulation, the process of the jet was explored and the flow field distribution of the micro water jet under the constraint of the gas flow was obtained.The results show that the scheme proposed was feasible, capable of reducing effectively the wearing of the jet nozzle and improving its resolution.
- high pressure micro water jet /
- constraint of gas flow /
- numerical simulation /
- wear of the jet nozzle

HTML全文

图 1 射流结构示意图

Figure 1. Jet structure

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图 2 网格划分图

Figure 2. Grid partition

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图 3 t=0.9 ms时的速度云图

Figure 3. Velocity contour at t=0.9 ms

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图 4 t=0.9 ms时速度变化曲线

Figure 4. Velocity varies with position at t=0.9 ms

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图 5 t=0.9 ms时压力云图线

Figure 5. Pressure contour at t=0.9 ms

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图 6 收缩段的压力变化曲线

Figure 6. Variation of pressure in the contraction section

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图 7 不同时刻两相的体积分布

Figure 7. Volume distribution of two phases at different times

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图 8 微喷嘴内出口位置水的体积分数

Figure 8. Volume fraction of water in the outlet of the micro nozzle

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图 9 稳定状态气、水两相的体积分布

Figure 9. Volume distribution of gas and water in the steady state

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图 10 速度随压力的变化曲线

Figure 10. Variation of velocity with pressure

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