| 周丰,孙昭晨,梁书秀.波浪环境中圆形垂向射流的试验研究[J].水利学报,2007,38(8):981-985 |
| 波浪环境中圆形垂向射流的试验研究 |
| Experimental study on vertical round jet discharged into wave environment with definite depth |
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| DOI： |
| 中文关键词: 射流 波周期 PIV 速度 |
| 英文关键词: vertical non_buoyant round jet wave environment particle image velocimetry wave period expansion core length attenuation of average velocity |
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| 摘要点击次数: 1895 |
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| 中文摘要: |
| 使用粒子图像测速技术PIV(particle image velocimetry)对有限水深规则波浪环境下圆形垂直射流进行了试验研究。应用相位分析法从测量结果中分离出时间平均的速度值。试验中用5种不同周期的波浪研究波周期对射流的影响，分析了射流核长度与射流比、射流出口速度与波浪速度之比和波陡的关系，以及一定区域内射流喷口轴线上垂向平均速度的衰减规律和射流宽度的发展规律。结果表明波周期对射流的流场特性有显著影响。 |
| 英文摘要: |
| The technology of particle image velocimetry (PIV) is applied to study the flow characteristics of a vertical turbulent non buoyant round jet discharging into the flow field with regular wave. The phase average technique is used to extract the mean velocity from the PIV measurement. It is found that the jet core length is remarkably affected by the wave period and decreases with the increa
se of wave length, i.e., the attenuation of the sectional average velocity of the jet will be quicker as the wave length is longer. The self similarity characteristic of the average velocity distribution tends to vanish as the wave period increases. The wave period also has significant influence on expansion of jet, the longer wave period corresponds to more wide of expansion. |
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