不同进气方式下气力提升泵水力特性理论模型与验证

发布时间：2018-06-06 21:24

本文选题：泵 + 模型　；参考：《农业工程学报》2017年21期

【摘要】：为了深入研究气力提升泵的提升性能,该文首先进行了理论分析,建立了适用于不同进气方式的气力提升模型。同时通过改变进气面积与气孔分布方式进行试验研究,试验结果与理论分析结果吻合较好,该模型在一定范围内能够较好地预测提升泵的提升流量;并且根据试验结果,进一步分析了不同进气方式对气力提升泵的液体提升量与提升效率的影响规律。结果表明:首先,7 mm方形喷嘴进气方式下,随着气流量的增加,提升液体流量先较快增加,之后上升趋势逐渐变缓,提升效率先迅速升高,达到峰值后又下降,而沉浸比升高会使峰值效率提高。其次,沉浸比为0.5时,不同进气面积下,较小的进气面积导致提升效率降低;在相同进气面积下,不同的气孔排布方式对提升液体流量与提升效率的影响并不明显。再次,当管内流型接近弹状流型时,提升效率较高,稳定性较好;在环状流下,提升泵的效率最低,稳定性差。
[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.
【作者单位】：西安理工大学西北旱区生态水利工程国家重点试验室培育基地;
【基金】：国家自然科学基金(11605136) 陕西省自然科学基础研究计划(2017JQ5040) 陕西省教育厅专项科研计划项目(15JK1553)
【分类号】：TH38

【相似文献】