| 韦渟渟1， 马西良1,2*， 黄浩然1.冷库除霜机器人空化射流喷嘴优化设计[J].轻工机械,2025,43(3):91-96 |
| 冷库除霜机器人空化射流喷嘴优化设计 |
| Optimal Design of Cavitation Jet Nozzle for Defrosting Robot in Cold Storage |
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| DOI：10.3969/j.issn.1005 2895.2025.03.013 |
| 中文关键词: 除霜机器人 除霜喷嘴 空化射流 正交试验 极差分析 |
| 英文关键词:defrosting robot defrosting nozzle cavitation jet orthogonal experiment range analysis |
| 基金项目:徐州市重点研发计划（产业重点技术研发）项目（KC21101）。 |
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| 摘要点击次数: 5 |
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| 中文摘要: |
| 为了实现冷库除霜，课题组以双腔室自激振荡喷嘴为基础，设计了一种用于除霜机器人的新型复合空化射流除霜喷嘴。基于L25(56)正交试验，运用FLUENT软件对25组不同尺寸结构参数的新型复合除霜喷嘴进行数值模拟，通过极差分析得到最佳尺寸结构参数组合；以喷嘴最大出口速度分布及蒸气体积分数的高低作为判断空化程度强弱的依据，研究不同入口压力对其空化射流效果的影响。结果表明：当振荡腔腔径比为1.00、振荡腔腔长比为1.00、振荡腔腔距为10.0 mm、收缩段长度为12.0 mm、扩散段长度为12.0 mm及扩散角为60°时，优化后的复合空化射流喷嘴空化射流效果最好；入口压力越大，优化后的复合空化射流喷嘴内流场速度分布区域、蒸气体积分数分布区域越大，说明喷嘴空化程度更剧烈、空化射流效果更好。优化后的复合空化射流喷嘴较普通喷嘴其空化射流冲蚀性能有了较大提升，为实现冷库除霜提供了一种更高效且绿色环保的参考方法。 |
| 英文摘要: |
| In order to achieve defrosting in cold storage, the research team designed a new type of composite cavitation jet defrosting nozzle for defrosting robot based on dual chamber self excited oscillation nozzle. Based on the L25 (56) orthogonal experiment, FLUENT software was used to numerically simulate 25 sets of new composite defrosting nozzles with different size structural parameters. The optimal combination of size structural parameters was obtained through range analysis. The influence of different inlet pressures on the cavitation jet effect was studied by using the maximum outlet velocity distribution of the nozzle and the vapor volume fraction as the basis for determining the strength of cavitation. The results show that the cavitation jet effect of the optimized composite cavitation jet nozzle is the best when the oscillation cavity diameter ratio is 1.00, the oscillation cavity length ratio is 1.00, the oscillation cavity distance is100 mm, the contraction section length is 12.0 mm, the diffusion section length is 12.0 mm and the diffusion angle is 60°. The larger the inlet pressure, the larger the velocity distribution area and vapor volume fraction distribution area in the optimized composite cavitation jet nozzle flow field, indicating that the nozzle cavitation degree is more severe and the cavitation jet effect is better. The optimized composite cavitation jet nozzle has significantly improved the cavitation jet erosion performance compared with ordinary nozzle, providing a more efficient and environmentally friendly reference method for defrosting cold storage. |
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