| 陈永当， 程云飞， 殷俊清， 赵诚诚， 顾金芋.喷孔锥度对喷气织机辅助喷嘴喷射性能的影响[J].轻工机械,2020,38(5):6-12 |
| 喷孔锥度对喷气织机辅助喷嘴喷射性能的影响 |
| Influence of Nozzle Taper on Comprehensive Performance of Air Jet Loom Auxiliary Nozzle |
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| DOI：10.3969/j.issn.1005 2895.2020.05.002 |
| 中文关键词: 喷气织机 辅助喷嘴 喷孔锥度 流场数值模拟 FLUENT |
| 英文关键词:air jet loom uxiliary nozzle nozzle taper flow field numerical simulation FLUENT |
| 基金项目:国家自然科学基金项目（61701384）；西安工程大学研究生创新基金项目（chx2019091）；陕西省科技厅重点产业链项目（2018TSCXL GY 03 02）；西安市科技计划项目（201805030YD8CG14 16）；西安市现代智能纺织装备重点实验室建设项目（2019220614SYS021CG043）；西安工程大学青年学术骨干支持计划；中国纺织工业联合会科技项目：电磁/气复合引纬技术研究（2019061）；西安市科技计划科技创新人才服务企业项目：基于电磁效应的复合引纬技术研究（2020KJRC0017）。 |
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| 中文摘要: |
| 为探究喷孔锥度对喷气织机多圆孔辅助喷嘴喷射性能的影响规律，课题组设计了3类等大中心环形分布喷孔辅助喷嘴，研究其流场特性。分别建立了不同喷孔锥度时3类辅助喷嘴的流场模型;利用FLUENT软件对上述流场模型进行数值模拟，得到供气压力0.3 MPa时各辅助喷嘴对称面上速度云图、出口流速中心线上速度衰减曲线图及距喷嘴出口不同距离处截面速度分布图；提取截面上速度分布数据点得到了3类多圆孔辅助喷嘴0°和10°时距出口不同距离处截面速度径向分布图。结果表明：随喷孔锥度增大，各多圆孔辅助喷嘴的喷射性能明显增强；喷孔锥度大于0°时，喷孔锥度越大各型喷嘴出口处射流速度也随之增大。课题组既分析了喷孔锥度和孔心距各自单一因素对喷嘴喷射性能的影响，又考虑了喷孔锥度和孔心距双因素对喷嘴喷射性能的影响，结果表明喷孔锥度对辅助喷嘴整体喷射性能的影响较孔心距的影响更为显著。 |
| 英文摘要: |
| In order to explore the influence of nozzle taper on the jetting performance of the multi hole auxiliary nozzle of air jet loom, three types of equal center circular distribution auxiliary nozzles were designed to study the characteristics of the flow field.The flow field models of three types of auxiliary nozzles with different nozzle taper were established respectively and numerically simulated by FLUENT software.[JP2]The velocity cloud map on the symmetry plane of each auxiliary nozzle, the velocity attenuation curve on the outlet velocity centerline and the velocity profile of the cross section at different distances from the nozzle outlet were obtainedat the supply pressure of 0.3 MPa. The velocity distribution data points on the cross section were extracted to obtain the radial distribution of the cross section velocity of the three types of multi hole auxiliary nozzles at different distances from the outlet at 0° and 10°. The results show that the jetting performance of each multi hole auxiliary nozzle is obviously enhanced with the increase of the nozzle taper; When the nozzle taper is greater than 0°, the jet velocity at the outlet of each nozzle increases as the taper increases.Furthermore, the influences of single variable of nozzle taper or center distance and double variables of nozzle taper and hole center distance on the jetting performance of the multi hole auxiliary nozzle were studied. The results show that the influence of the nozzle taper on the overall jetting performance of the auxiliary nozzle is more significant than the hole center distance. |
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