一种新型谐振模式驱动大腔合成射流致动器的动力学特性

IF 2.8 2区 工程技术 Q2 ENGINEERING, MECHANICAL Experimental Thermal and Fluid Science Pub Date : 2024-11-16 DOI:10.1016/j.expthermflusci.2024.111356
L.F. Olivera-Reyes, E.S. Palacios de Paz, S. Sánchez, J.F. Hernández-Sánchez
{"title":"一种新型谐振模式驱动大腔合成射流致动器的动力学特性","authors":"L.F. Olivera-Reyes,&nbsp;E.S. Palacios de Paz,&nbsp;S. Sánchez,&nbsp;J.F. Hernández-Sánchez","doi":"10.1016/j.expthermflusci.2024.111356","DOIUrl":null,"url":null,"abstract":"<div><div>Synthetic Jet (SJ) actuators are an intrinsically complex combination of electronics, electric and mechanical systems. When studied theoretically, these elements are often simplified to coupled damped harmonic oscillators (DHO) that induce a pressure field within the cavity and drive momentum exchange. Thus, the dynamics of an SJ actuator result from coupling these DHOs, naturally leading to a few resonant modes. There is good evidence in the specialized literature of two resonant modes developing in SJ actuators: the membrane/piezoelectric mode and the Helmholtz resonance. In this work, we report on the effect of a new resonant mode that dominates the two traditional modes when it develops. We present evidence that the resonant mode develops when the cavity is much larger than the volume displaced by the actuator. The new resonant mode is biased to lower frequencies and has a flatter response along the frequency band than other resonant modes. We show that jet and vortex velocities mimic the sound pressure curve for the low-frequency range. Its effect mitigates for the higher range due to a delve through shorter stroke lengths, characterized through the well-documented formation criteria as a fixed relation between the Reynolds and the Stokes numbers. We further characterize the new resonant mode by comparing its intensity with standard room modes. We also show that the resonant mode may be dimmed and focused by adding an obstacle in different cavity positions for the lower sound intensities. We consider that the large-cavity dynamics is an additional element that, if integrated as design criteria, could extend the applicability of SJs and their optimum response.</div></div>","PeriodicalId":12294,"journal":{"name":"Experimental Thermal and Fluid Science","volume":"162 ","pages":"Article 111356"},"PeriodicalIF":2.8000,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A novel resonant mode drives the dynamics of a large-cavity synthetic jet actuator\",\"authors\":\"L.F. Olivera-Reyes,&nbsp;E.S. Palacios de Paz,&nbsp;S. Sánchez,&nbsp;J.F. Hernández-Sánchez\",\"doi\":\"10.1016/j.expthermflusci.2024.111356\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Synthetic Jet (SJ) actuators are an intrinsically complex combination of electronics, electric and mechanical systems. When studied theoretically, these elements are often simplified to coupled damped harmonic oscillators (DHO) that induce a pressure field within the cavity and drive momentum exchange. Thus, the dynamics of an SJ actuator result from coupling these DHOs, naturally leading to a few resonant modes. There is good evidence in the specialized literature of two resonant modes developing in SJ actuators: the membrane/piezoelectric mode and the Helmholtz resonance. In this work, we report on the effect of a new resonant mode that dominates the two traditional modes when it develops. We present evidence that the resonant mode develops when the cavity is much larger than the volume displaced by the actuator. The new resonant mode is biased to lower frequencies and has a flatter response along the frequency band than other resonant modes. We show that jet and vortex velocities mimic the sound pressure curve for the low-frequency range. Its effect mitigates for the higher range due to a delve through shorter stroke lengths, characterized through the well-documented formation criteria as a fixed relation between the Reynolds and the Stokes numbers. We further characterize the new resonant mode by comparing its intensity with standard room modes. We also show that the resonant mode may be dimmed and focused by adding an obstacle in different cavity positions for the lower sound intensities. We consider that the large-cavity dynamics is an additional element that, if integrated as design criteria, could extend the applicability of SJs and their optimum response.</div></div>\",\"PeriodicalId\":12294,\"journal\":{\"name\":\"Experimental Thermal and Fluid Science\",\"volume\":\"162 \",\"pages\":\"Article 111356\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-11-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Experimental Thermal and Fluid Science\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0894177724002255\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Experimental Thermal and Fluid Science","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0894177724002255","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0

摘要

合成射流(SJ)致动器是电子、电气和机械系统的内在复杂组合。在进行理论研究时,这些元素通常被简化为耦合阻尼谐波振荡器(DHO),在空腔内产生压力场并驱动动量交换。因此,SJ 激励器的动力学产生于这些 DHO 的耦合,自然会产生一些共振模式。专业文献中有充分证据表明,SJ 激励器中出现了两种共振模式:膜/压电模式和亥姆霍兹共振。在这项工作中,我们报告了一种新谐振模式的效果,当这种模式出现时,它将主导这两种传统模式。我们提出的证据表明,当空腔远大于致动器位移的体积时,共振模式就会出现。与其他共振模式相比,新的共振模式偏向于较低的频率,并且在频带上具有较平坦的响应。我们的研究表明,在低频范围内,喷射速度和涡流速度模仿了声压曲线。其影响在较高频率范围内有所减弱,原因是通过较短的冲程长度进行了深入,而这是通过雷诺数和斯托克斯数之间的固定关系这一已被充分证明的形成标准来描述的。通过比较新共振模式与标准室内模式的强度,我们进一步确定了新共振模式的特征。我们还表明,通过在不同的腔体位置添加障碍物,共振模式可以在较低的声强下变暗和聚焦。我们认为,大腔动力学是一个额外的因素,如果将其作为设计标准,可以扩大 SJ 的适用范围及其最佳响应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
A novel resonant mode drives the dynamics of a large-cavity synthetic jet actuator
Synthetic Jet (SJ) actuators are an intrinsically complex combination of electronics, electric and mechanical systems. When studied theoretically, these elements are often simplified to coupled damped harmonic oscillators (DHO) that induce a pressure field within the cavity and drive momentum exchange. Thus, the dynamics of an SJ actuator result from coupling these DHOs, naturally leading to a few resonant modes. There is good evidence in the specialized literature of two resonant modes developing in SJ actuators: the membrane/piezoelectric mode and the Helmholtz resonance. In this work, we report on the effect of a new resonant mode that dominates the two traditional modes when it develops. We present evidence that the resonant mode develops when the cavity is much larger than the volume displaced by the actuator. The new resonant mode is biased to lower frequencies and has a flatter response along the frequency band than other resonant modes. We show that jet and vortex velocities mimic the sound pressure curve for the low-frequency range. Its effect mitigates for the higher range due to a delve through shorter stroke lengths, characterized through the well-documented formation criteria as a fixed relation between the Reynolds and the Stokes numbers. We further characterize the new resonant mode by comparing its intensity with standard room modes. We also show that the resonant mode may be dimmed and focused by adding an obstacle in different cavity positions for the lower sound intensities. We consider that the large-cavity dynamics is an additional element that, if integrated as design criteria, could extend the applicability of SJs and their optimum response.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Experimental Thermal and Fluid Science
Experimental Thermal and Fluid Science 工程技术-工程:机械
CiteScore
6.70
自引率
3.10%
发文量
159
审稿时长
34 days
期刊介绍: Experimental Thermal and Fluid Science provides a forum for research emphasizing experimental work that enhances fundamental understanding of heat transfer, thermodynamics, and fluid mechanics. In addition to the principal areas of research, the journal covers research results in related fields, including combined heat and mass transfer, flows with phase transition, micro- and nano-scale systems, multiphase flow, combustion, radiative transfer, porous media, cryogenics, turbulence, and novel experimental techniques.
期刊最新文献
Pool boiling on the aluminum alloy, copper and WC-coated copper with micro-finned textures and developed multimodal roughness formed by nanosecond laser radiation A three-axis regime diagram for quantitative analyses of the mixing field structure in laminar and turbulent combustion Genetically-based active flow control of a circular cylinder wake via synthetic jets Experimental assessment of multi-phase flow distribution in an evaporator header through Design of Experiments techniques Improvement of a wire-mesh sensor based on the bubble-wire collision kinematics
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1