| 掺气减蚀研究的新方向 |
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| 引用本文： | 陈先朴,西汝泽,邵东超,柴恭纯.掺气减蚀研究的新方向[J].水利水电技术,2001,32(10):13-16. |
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| 作者姓名： | 陈先朴 西汝泽 邵东超 柴恭纯 |
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| 作者单位： | 1. 安徽省、水利部淮河水利委员会水利科学研究院,
2. 中国水力发电 工程学会科学技术咨询服务中心 |
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| 摘 要： | 利用针式掺气流速仪测量掺气浓度场、流速场，气泡尺寸及其概率分布的研究成果表明，原型水流韦伯数高，形成微小气泡的能力比模型强，气泡上浮慢，接近底部的小尺寸气泡概率及掺气浓度比模型大，0．2mm或0．5mm以下的微小气泡可能在掺气减蚀中起着主要作用，完善掺气检测仪器，加强掺气水流中气泡尺寸及其概率分布的观测，比较不同气泡尺寸的掺气减蚀作用，建立多级气泡尺寸的掺气水流数学模型，是今后掺气减蚀研究的新方向。
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| 关 键 词： | 高速水流 泄水建筑物 掺气减蚀 掺气浓度 掺气测量仪器 气泡尺寸 |
| 文章编号： | 1000-0860(2001)10-0013-04 |
| 修稿时间： | 2001年7月12日 |
New Study Directions of Entrain Air to Reduce Cavitation Damage |
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| Chen Xianpu ,Xie Ruze ,Shao Dongchao ,Chai Gongchun.New Study Directions of Entrain Air to Reduce Cavitation Damage[J].Water Resources and Hydropower Engineering,2001,32(10):13-16. |
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| Authors: | Chen Xianpu Xie Ruze Shao Dongchao Chai Gongchun |
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| Affiliation: | Chen Xianpu 1,Xie Ruze 1,Shao Dongchao 1,Chai Gongchun 2 |
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| Abstract: | Using the air concentration probe of needle type,the air concentration field,velocity field,scale and probability distribution of air bubble s were measured.The results indicated that comparing prototype with model,theWeber number is high,capability of producing tiny air bubbles is powerful ,and near bottom the probability and air concentration of tiny air bubbles is bigg.Perhaps the air bubbles of smaller than0.2mm or0.5mm play the main role in reducing cavitation damage.The new directions of study on entrain air to reduce cavitation damage include improv-ing instrument of measuring air concentration,emphasizing the observation of scale and probability distribution of air bubbles,studying the relation of air bubbles scale with reducing cavitation damage,and setting up the mathematical model of entrain air flow with manifold air bubble scale. |
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| Keywords: | high velocity hydraulics discharge structure entrain air to reduce cavitation damage air concentra-tion air bubble scale probability distribution of air bubbles |
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