| 高速部分流泵整机非定常流动数值模拟 |
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| 引用本文： | 柴立平,潘兵辉,石海峡,江伟,曹敏红.高速部分流泵整机非定常流动数值模拟[J].排灌机械,2011,29(4):303-306. |
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| 作者姓名： | 柴立平 潘兵辉 石海峡 江伟 曹敏红 |
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| 作者单位： | 江苏大学流体机械工程技术研究中心,江苏镇江,212013 |
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| 基金项目： | 安徽省科技攻关计划项目(08102303) |
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| 摘 要： | 为研究高速部分流泵内部由于叶轮和蜗壳之间动静干涉作用引起的压力脉动的机理,采用计算流体动力学软件Fluent中的滑移网格技术,对该泵在3种工况下（0.5Q0,1.0Q0,1.5Q0）的整机进行非定常数值模拟,捕捉到3个不同时刻不同流量下的蜗壳区中间截面的静压分布图,并对蜗壳内壁面设置的9个监测点速度以及静压进行快速傅里叶变换,得到压力脉动的时域和频域图.模拟结果表明：在相同流量下,各流道内的静压随着时间改变不大;在同一时刻,随着流量的增大静压变大;压力脉动呈周期性变化,且随着流量的增大,幅值也增大;在0.5Q0的工况时,监测点4的幅值最大且振动最为剧烈;在设计工况和大流量时,监测点5的压力幅值最大,且各个监测点频域幅值随流量的增大而逐渐增大,这表明流量对高速部分流泵的振动有极大的影响,且喷嘴区域的振动最为严重.
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| 关 键 词： | 高速部分流泵 非定常流动 压力脉动 频域图 静压 |
Numerical simulation of unsteady flow in high-speed partial emission pump |
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| Chai Liping,Pan Binghui,Shi Haixia,Jiang Wei,Cao Minhong.Numerical simulation of unsteady flow in high-speed partial emission pump[J].Drainage and Irrigation Machinery,2011,29(4):303-306. |
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| Authors: | Chai Liping Pan Binghui Shi Haixia Jiang Wei Cao Minhong |
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| Institution: | Chai Liping,Pan Binghui,Shi Haixia,Jiang Wei,Cao Minhong (Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang,Jiangsu 212013,China) |
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| Abstract: | In order to research the mechanism of pressure fluctuation that were caused by the impeller-volute interaction of a high-speed partial emission pump,a numerical simulation of unsteady flow was carried out by applying the sliding mesh technique in computational fluid dynamics software Fluent on the whole pump under three working points of 0.5Q0,1.0Q0 and 1.5Q0,respectively.The static pressure distribution of volute was recorded at three different times and flow rates,and the time and frequency domain of pres... |
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| Keywords: | high-speed partial emission pump unsteady flow pressure fluctuation frequency domain static pressure |
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