| 基于VOF模型的真空吸鱼泵抽吸过程参数影响分析 |
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| 引用本文： | 林礼群,董晓妮,王志勇,张耀明,徐志强. 基于VOF模型的真空吸鱼泵抽吸过程参数影响分析[J]. 中国农机化学报, 2022, 43(12): 39-43. DOI: 10.13733/j.jcam.issn.20955553.2022.12.007 |
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| 作者姓名： | 林礼群 董晓妮 王志勇 张耀明 徐志强 |
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| 作者单位： | 中国水产科学研究院渔业机械仪器研究所，农业农村部远洋渔船与装备重点实验室，上海市，200092 |
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| 基金项目： | 国家重点研发计划课题(2020YFD0901201)；中国水产科学研究院科技创新团队(2020TD80)；山东省重点研发计划(2021SFGC0701) |
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| 摘 要： | 真空吸鱼泵是水产养殖中用于起捕输送活鱼的一种重要工具，为探究真空吸鱼泵抽气压力、吸程及管道入口流速之间的关系，计算建立5种不同吸程的真空吸鱼泵流道物理模型，应用瞬态VOF方法捕捉不同参数影响下的水气界面气液两相流变化。数值计算结果表明：同一抽气压力下，不同吸程管道的入口速度在0.5 s内迅速增大，之后波动减小，且入口平均速度偏差仅3.4%,吸程对管道入口平均速度几乎无影响；管道内水抽吸至集鱼筒后，充满大量水与气团组成的泡沫状气液混合体，不同吸程下的集鱼筒在t=8 s时均已注满水；吸程为2、3、4、5、6 m的吸鱼泵抽吸过程的所需的临界抽气压力分别为-13、-14、-16、-20、-25 kPa,吸程与临界抽气压力关系拟合为多项式，可得出同一真空吸鱼泵在任意吸程条件下所需最大抽气负压值。
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| 关 键 词： | 真空吸鱼泵 两相流 吸程 临界抽气压力 入口速度 |
Analysis on the influence of the pumping process parameters of the vacuum fish pump based on VOF model |
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| Abstract: | The vacuum fish pump is an important tool for catching and conveying fish in aquaculture. In order to research the relationship among the pumping pressure, suction range and pipe inlet velocity of the vacuum fish pump, five different suction range geometric models of the vacuum fish pump were established. The transient Volume of Fluid method was used to capture the changes of gas liquid two phase flow at the water gas interface under the influence of different parameters. The numerical results are displayed: under the same pumping pressure, the inlet velocity of pipes with different suction ranges increases rapidly within 0.5 s, and then the fluctuation decreases, the average velocity deviation at the inlet of the pipeline is less than 3.4%, indicating that the average velocity at the inlet of the pipe is hardly affected by the suction head. After the water in the pipeline is pumped to the fish collecting tank, it is filled with a large amount of foam gas liquid mixture composed of water and air mass. At t=8 s, all the fish bins with different suction ranges have been filled with water. The critical pumping pressure corresponding to suction range of 2, 3, 4, 5 and 6 m is -13, -14, -16, -20 and -25 kPa respectively. The relationship between suction range and critical extraction pressure can be fitted as a polynomial; the maximum suction negative pressure required by the same vacuum fish pump under any suction range can be calculated. |
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| Keywords: | vacuum fish pump gas liquid two phase flow suction range critical pumping pressure inlet velocity |
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