流体机械

2017, v.45;No.539(05) 21-25

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异形中心体诱发空化射流的数值模拟研究
Study on Numerical Simulation of Cavitation Water Jet Induced by Abnormal Central-body

邓松圣;廖松;于以兵;管金发;
DENG Song-sheng;LIAO Song;YU Yi-bing;GUAN Jin-fa;Logistical Engineering University of PLA;

摘要(Abstract):

为了产生更好的空化效果,探索空化射流应用于油罐清洗除锈的新方式,提高清洗除锈的效率和安全性。提出了将异形中心体与锥形喷嘴组合产生空化射流的思路,采Mixture多相流模型,在12 MPa的射流压力下,对含平头柱体、90°锥形柱体和半球柱体3种中心体喷嘴产生的射流流场进行数值模拟,重点对流场压力分布、轴向速度分布和空化体积进行了对比分析。研究表明:含半球柱体喷嘴比另两种异形中心体喷嘴产生更高的射流速度,且存在较大的核心区;含半球柱体喷嘴和含90°锥形柱体喷嘴比含平头柱体产生的空化区域更大,稳定性更好;含90°锥形柱体喷嘴射流产生空化泡扩散距离最长,空化体积最大。
In order to produce better cavitation effect and explore a new way of cavitation water jet used in oil tank cleaning and derusting, so as to improve the efficiency and safety of cleaning and derusting. The idea of combining the special shaped central-body with the conical nozzle is proposed.The Mixture multiphase flow model is used to simulate the effect of the jet nozzle on the center nozzle with the flat head cylinder, the 90° cone-shaped cylinder and the hemisphere cylinder under the jet pressure of 12 MPa,the numerical simulation of the jet flow field is carried out. The pressure distribution, the axial velocity distribution and the cavitation volume are compared and analyzed. The results show that the nozzle with hemisphere cylinder has higher jet velocity than the other two nozzles, and there is a large core area;The nozzle with hemisphere cylinder and the nozzle with 90° cone-shaped cylinder have larger cavitation area than that with the flat head cylinder,stability is better;The nozzle with 90° cone-shaped cylinder produced cavitation bubble with the longest diffusion distance and the largest cavitation volume.

关键词(KeyWords): 异形中心体;空化;数值模拟;Mixture模型
abnormal central-body;cavitation;numerical simulation;mixture model

Abstract:

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基金项目(Foundation): 总后军需物资油料部项目(YX213C208)

作者(Author): 邓松圣;廖松;于以兵;管金发;
DENG Song-sheng;LIAO Song;YU Yi-bing;GUAN Jin-fa;Logistical Engineering University of PLA;

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