| 引用本文: | 赵章焰,王煜,李维东,王国贤.干式超声清洗头空腔结构声模态特性数值模拟[J].哈尔滨工业大学学报,2023,55(12):141.DOI:10.11918/202207083 |
| ZHAO Zhangyan,WANG Yu,LI Weidong,WANG Guoxian.Numerical simulation of acoustic modal characteristics of cavity structure of dry ultrasonic cleaning head[J].Journal of Harbin Institute of Technology,2023,55(12):141.DOI:10.11918/202207083 |
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| 摘要: |
| 为研究干式超声波清洗头空腔结构的流场和声场特性,根据干式超声清洗头的超声波发声机理设计了通过流体间流体力学相互作用发声的3 mm腔体(小腔体)结构和通过流体与声学模态共振相互作用发声的10 mm腔体(大腔体)结构,采用计算流体力学(computational fluid dynamics,CFD)方法对所设计的方腔展开数值研究。结果表明:两结构有着相似的流场特性,相同压力条件下小腔体的流激振荡更激烈；腔体内最大流速随压力的增大而增大,最大流速的增长率随压力增大而减小,不同的腔体在相同压力条件下最大速度、最大速度的增长率相近；两种结构均能产生超声波,其超声波发声机理与腔体尺寸相关,发声机理与预测值相符。研究表明,针对干式超声波清洗头的流道结构设计并不局限于流体间流体力学相互作用发声的小腔体,大腔体同样可以产生强烈高频超声波,这为干式超声波清洗头的结构设计提供参考。 |
| 关键词: 干式超声清洗 CFD 流激振荡 超声波 空腔结构 |
| DOI：10.11918/202207083 |
| 分类号:TB559 |
| 文献标识码:A |
| 基金项目: |
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| Numerical simulation of acoustic modal characteristics of cavity structure of dry ultrasonic cleaning head |
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ZHAO Zhangyan1,WANG Yu1,LI Weidong2,3,WANG Guoxian1
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(1.School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China; 2.Laboratory of Aerodynamics in Multiple Flow Regimes (China Aerodynamics Research and Development Center), Mianyang 621000, Sichuan, China;3.Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, Sichuan, China)
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| Abstract: |
| This article aims to explore the flow field and sound field characteristics of the cavity structure of the dry ultrasonic cleaning head. According to the ultrasonic sounding mechanism of the dry ultrasonic cleaning head, a 3 mm cavity (small cavity) structure that generates sound through the hydrodynamic interaction between fluids and a 10 mm cavity (large cavity) structure that generates sound through the resonant interaction between fluid and acoustic mode are designed. The designed square cavity is numerically studied by the computational fluid dynamics (computational fluid dynamics, CFD) method. The results show that the two structures have similar flow field characteristics, and the flow-induced oscillation of the small cavity is more intense under the same pressure. As the pressure increases, the maximum velocity in the cavity increases and the growth rate of the maximum velocity decreases. The growth rates of the maximum velocity and the maximum velocity are similar for different cavities under the same pressure. Both structures can produce ultrasonic waves. The ultrasonic sound generation mechanism is related to the size of the cavity, and the occurrence mechanism is consistent with the predicted value. The research shows that the design of the channel structure of the dry ultrasonic cleaning head is not limited to the small cavity where the hydrodynamics interaction between fluids makes the sound, and the large cavity can also produce strong high-frequency ultrasound, which provides a reference for the structural design of the dry ultrasonic cleaning head. |
| Key words: dry ultrasonic cleaning CFD flow-induced oscillation ultrasound the cavity structure |
