| 环形水射流流场的实验研究与统计分析 |
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| 引用本文： | 康灿,张峰,杨敏官,肖胜男.环形水射流流场的实验研究与统计分析[J].实验流体力学,2011,25(1). |
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| 作者姓名： | 康灿 张峰 杨敏官 肖胜男 |
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| 作者单位： | 江苏大学能源与动力工程学院,江苏,镇江,212013 |
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| 基金项目： | 国家自然科学基金资助项目(50806031) |
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| 摘 要： | 在11、12和15MPa射流压力下对环形自由水射流流场进行实验研究,以获得该射流场的能量特征与液滴尺寸分布规律。运用相位多普勒粒子测速(PDPA)技术对射流流场中的速度分布和液滴粒径分布进行测量,并对通过不同位置控制体的单个液滴行为进行了统计分析。研究表明:环形射流流束中心存在着较宽的高速区域,且射流能量沿着射流方向衰减缓慢;距离喷嘴的轴向距离越大,射流横断面上的速度与液滴粒径分布越平坦;射流压力对流束中心的轴向速度变化影响较大,对液滴粒径分布的影响不明显;射流流束中心区的湍流脉动较弱,但通过位于射流中心位置的控制体的液滴粒径谱较宽。
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| 关 键 词： | 环形射流 PDPA 脉动速度 粒径 控制体 统计方法 |
Experimental and statistical analysis of water jet discharged from an annular nozzle |
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| KANG Can,ZHANG Feng,YANG Min-guan,XIAO Sheng-nan.Experimental and statistical analysis of water jet discharged from an annular nozzle[J].Experiments and Measur in Fluid Mechanics,2011,25(1). |
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| Authors: | KANG Can ZHANG Feng YANG Min-guan XIAO Sheng-nan |
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| Institution: | KANG Can,ZHANG Feng,YANG Min-guan,XIAO Sheng-nan(School of Energy and Power Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China) |
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| Abstract: | Under jet pressures of 11,12 and 15MPa,free water jet discharged from an annular nozzle was experimentally studied.The objective is to obtain energy distribution and droplet diameter distribution in the jet flow field.Phase Doppler Particle Anemometry(PDPA) was applied in measurement of velocity and droplet diameter distributions.Statistical analysis of those droplets passing through control volumes at different locations was performed.The results indicate that a relatively wide high-velocity zone exists ne... |
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| Keywords: | annular jet PDPA fluctuating velocity droplet diameter control volume statistical method |
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