本文選題：泵 + 模型�。� 參考：《農(nóng)業(yè)工程學報》2017年21期

【摘要】：為了深入研究氣力提升泵的提升性能,該文首先進行了理論分析,建立了適用于不同進氣方式的氣力提升模型。同時通過改變進氣面積與氣孔分布方式進行試驗研究,試驗結(jié)果與理論分析結(jié)果吻合較好,該模型在一定范圍內(nèi)能夠較好地預測提升泵的提升流量;并且根據(jù)試驗結(jié)果,進一步分析了不同進氣方式對氣力提升泵的液體提升量與提升效率的影響規(guī)律。結(jié)果表明:首先,7 mm方形噴嘴進氣方式下,隨著氣流量的增加,提升液體流量先較快增加,之后上升趨勢逐漸變緩,提升效率先迅速升高,達到峰值后又下降,而沉浸比升高會使峰值效率提高。其次,沉浸比為0.5時,不同進氣面積下,較小的進氣面積導致提升效率降低;在相同進氣面積下,不同的氣孔排布方式對提升液體流量與提升效率的影響并不明顯。再次,當管內(nèi)流型接近彈狀流型時,提升效率較高,穩(wěn)定性較好;在環(huán)狀流下,提升泵的效率最低,穩(wěn)定性差。
[Abstract]:In order to further study the lifting performance of the pneumatic lifting pump, the paper first carried out a theoretical analysis and established a model of air lift for different air intake modes. At the same time, the experimental study was carried out by changing the air inlet area and the distribution mode of the air hole. The experimental results were better kissed with the theoretical analysis, and the model could be better in a certain range. According to the test results, the effect of different intake modes on the liquid lift and lifting efficiency of the air lift pump is further analyzed. The results show that, first, the 7 mm square nozzle intake mode, with the increase of gas flow, the increase of the liquid flow rate first increases, and then the rising trend gradually changes. In addition, when immersion ratio is 0.5, the smaller air intake area can reduce the efficiency of lifting, and the effect of different air hole arrangement on the increase of liquid flow and efficiency is not affected by the same intake area. Obviously, when the flow pattern of the pipe is close to the slug flow pattern, the lifting efficiency is higher and the stability is better. Under the annular flow, the lifting pump has the lowest efficiency and the stability is poor.
【作者單位】： 西安理工大學西北旱區(qū)生態(tài)水利工程國家重點試驗室培育基地;
【基金】：國家自然科學基金(11605136) 陜西省自然科學基礎研究計劃(2017JQ5040) 陜西省教育廳專項科研計劃項目(15JK1553)
【分類號】：TH38

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本文編號：1988155