造雪机用旋流喷嘴雾化特性的模拟研究
摘要：旋流喷嘴作为造雪机关键部件，其雾化效果直接影响成雪效果。为进一步探索旋流喷嘴雾化特性，基于VOF to DPM模型，建立旋流喷嘴雾化的数值模型，对旋流喷嘴进行三维数值模拟。研究不同入口压力对液滴粒径、液滴速度等雾化特性的影响，并通过实验验证了模型的准确性。结果表明，喷雾充分发展后，索特平均粒径随入口压力的增大而减小，入口压力增大，增强了液体和空气之间的气动不稳定性，促进了液体的破碎分解，缩短了液体所需破碎时间；液膜和液滴速度都随着入口压力的增大而增大，当入口压力由0.6 MPa增大到1.4 MPa时，出口液膜和液滴速度分别增加58.8%和52.2%;在破碎过程中，动能转化为表面能，会使液体速度发生削减。
关键词：旋流喷嘴造雪机雾化特性成雪时间数值模拟
尊敬的用户，本篇文章需要2元，点击支付交费后阅读
限时优惠福利：领取VIP会员
全年期刊、VIP视频免费!
全年期刊、VIP视频免费!
参考文献[1] 刘国强，熊通，晏刚，等.人工造雪技术现状与研究进展[J].制冷学报，2021,42(5):1- 16.
[2] LAGUARTA F,ARTIGAS R,CADEVALL C.3D shape measurement of nozzles on the micrometric scale[C]//Optical Metrology in Production Engineering.International Society for Optics and Photonics,2004:74- 82.
[3] LEE S J,KIM H L,LEE J P,et al.Jet flow characteristics of sinusoidal wavy nozzles[J].Journal of mechanical science and technology,2012,26(12):4007- 4016.
[4] 吴恩启，顾自明，赵兵，等.空气雾化喷嘴的设计与实验研究[J].热能动力工程，2018,33(4):69- 75.
[5] SHRIGONDEKAR H,CHOWDHURY A,PRABHU S V.Characterization of solid-cone simplex mist nozzles[J].Fire safety journal,2019,10:145- 147.
[6] BRONIARZ-PRESS L,WLODARCZAK S,MATUSZAK M,et al.The effect of orifice shape and the injection pressure on enhancement of the atomization process for pressure-swirl atomizers[J].Crop protection,2016,82:65- 74.
[7] 王鑫，孙靖，韩克鑫，等.循环流化床制冰系统用喷嘴的数值模拟研究[J].盐科学与化工，2020,49(8):19- 24.
[8] 马佳敏，王博韬，李胡坤，等.旋流雾化喷嘴雾化特性的数值模拟[J].航空发动机，2019,45(5):53- 57.
[9] 李霄月，邹建锋，张阳，等.液体射流首次破碎的直接数值模拟及动力学过程分析[J].推进技术，2018,39(7):1529- 1539.
[10] 邵长孝，罗坤，樊建人.旋转射流雾化的直接数值模拟研究[J].工程热物理学报，2017,38(3):553- 556.
[11] 李佳楠，雷凡培，周立新.背压对撞击式喷嘴雾化特性影响研究[J].推进技术，2020,41(4):847- 859.
[2] LAGUARTA F,ARTIGAS R,CADEVALL C.3D shape measurement of nozzles on the micrometric scale[C]//Optical Metrology in Production Engineering.International Society for Optics and Photonics,2004:74- 82.
[3] LEE S J,KIM H L,LEE J P,et al.Jet flow characteristics of sinusoidal wavy nozzles[J].Journal of mechanical science and technology,2012,26(12):4007- 4016.
[4] 吴恩启，顾自明，赵兵，等.空气雾化喷嘴的设计与实验研究[J].热能动力工程，2018,33(4):69- 75.
[5] SHRIGONDEKAR H,CHOWDHURY A,PRABHU S V.Characterization of solid-cone simplex mist nozzles[J].Fire safety journal,2019,10:145- 147.
[6] BRONIARZ-PRESS L,WLODARCZAK S,MATUSZAK M,et al.The effect of orifice shape and the injection pressure on enhancement of the atomization process for pressure-swirl atomizers[J].Crop protection,2016,82:65- 74.
[7] 王鑫，孙靖，韩克鑫，等.循环流化床制冰系统用喷嘴的数值模拟研究[J].盐科学与化工，2020,49(8):19- 24.
[8] 马佳敏，王博韬，李胡坤，等.旋流雾化喷嘴雾化特性的数值模拟[J].航空发动机，2019,45(5):53- 57.
[9] 李霄月，邹建锋，张阳，等.液体射流首次破碎的直接数值模拟及动力学过程分析[J].推进技术，2018,39(7):1529- 1539.
[10] 邵长孝，罗坤，樊建人.旋转射流雾化的直接数值模拟研究[J].工程热物理学报，2017,38(3):553- 556.
[11] 李佳楠，雷凡培，周立新.背压对撞击式喷嘴雾化特性影响研究[J].推进技术，2020,41(4):847- 859.
Numerical study on atomization characteristics of swirl nozzle for artificial snowmakers
Abstract: Swirl nozzle is regarded as the key component of on artificial snowmaker, its atomization effect directly affects the snow quality. A three-dimensional numerical model of swirl nozzle atomization is established based on VOF to DPM model, in order to further explore the atomization characteristics of swirl nozzle. The effects of inlet pressure on the atomization characteristics such as droplet size and velocity are studied, and the accuracy of the model is verified by experiments. The results show that after full development of spray, the Sauter mean diameter decreases with the increase of inlet pressure. The rising pressure enhances the aerodynamic instability between liquid and air, promotes the liquid breakup, and shortens the breakup time of liquid. The velocity of liquid film and droplet both increase with the rising inlet pressure. With the inlet pressure increasing from 0.6 MPa to 1.4 MPa, the velocity of liquid film and droplets can increase by 58.8% and 52.2%. Moreover, during the breakup process, the conversion of kinetic energy into surface energy reduces the liquid velocity.
Keywords: swirl nozzle; artificial snowmaker; atomization characteristic; snow making time; numerical simulation;
489
0
0