【摘要】：吸魚泵作為圍拖網(wǎng)漁船活魚運輸?shù)闹匾考?其質(zhì)量的好壞對活魚的影響非常巨大。為此,吸魚泵的效率以及活魚的損傷率一直是人們最為關(guān)心的問題。如何提高吸魚泵的效率以及降低吸魚泵的損傷率是各個企業(yè)追逐的重要目標。本文吸魚泵的主要輸送的對象是秋刀魚,秋刀魚的長度在20-35厘米左右。為了使合作單位能夠更好的得到吸魚泵的研究數(shù)據(jù),對吸魚泵進行結(jié)構(gòu)設(shè)計以及通過數(shù)值模擬計算進行研究,在設(shè)計上:結(jié)合普通離心泵以及吸沙泵的特征,確定葉輪的結(jié)構(gòu)和形式,并通過三維軟件Solidworks對實際尺寸縮小十倍建模。在分析上:通過FLUENT軟件對吸魚泵進行單相流與兩相流流場分析。單相流模型在空載工況時選取轉(zhuǎn)速度進行數(shù)值模擬;兩相流模型從四個方面進行數(shù)值模擬:1、轉(zhuǎn)速;2、體積流量;3、顆粒(魚體縮小后以顆粒描述)大小;4、顆粒的濃度。葉輪的壁面采用對稱建模,并且運用柔性旋轉(zhuǎn)分布,這樣使得葉輪做有用功同時將流體輸出到出口管。通過對吸魚泵流場的分析,能夠得到以下的結(jié)論:葉輪采用的柔性旋轉(zhuǎn)分布,轉(zhuǎn)速在1250rad/min-1450rad/min,流量在0.8Q-1.2Q最適合。魚水混合物之比(魚的體積與水的比例)在30%-50%適合活魚輸送。經(jīng)合作企業(yè)試驗,符合實際應(yīng)用。
[Abstract]:Fish suction pump is an important part of trawler's transport of live fish, and its quality has a great influence on live fish. Therefore, the efficiency of fish suction pump and the damage rate of live fish have been the most concerned issues. How to improve the efficiency of fish suction pump and reduce the damage rate of fish suction pump is an important goal pursued by various enterprises. In this paper, the main transport object of the suction pump is the autumnal saber, the length of which is about 20-35 cm. In order to get the research data of fish suction pump better, the structure design and numerical simulation calculation of fish suction pump are studied. In the design, the characteristics of ordinary centrifugal pump and sediment suction pump are combined. The structure and form of impeller are determined, and the actual size is reduced ten times by Solidworks. The single phase flow and two phase flow field of fish suction pump are analyzed by FLUENT software. The single-phase flow model is numerically simulated under no-load condition, and the two-phase flow model is simulated from four aspects: (1) rotational speed; (2) volume flow; (3) the size of particles (described by particles after the reduction of fish body); 4, the concentration of particles. The wall of the impeller is modeled symmetrically and the flexible rotating distribution is used to make the impeller work and output the fluid to the outlet tube. By analyzing the flow field of fish suction pump, the following conclusions can be drawn: the flexible rotation distribution of impeller, the rotational speed of 1250radmin-1450radr / min, and the flow rate of 0.8Q-1.2Q are most suitable. The ratio of fish water mixture (the ratio of fish volume to water) is 30%-50% suitable for live fish transport. Through the joint venture test, in line with the practical application.
【學(xué)位授予單位】：浙江海洋大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S972.7

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