Simultaneous measurements of liquid film thickness and 2D temperature distribution in microfluidic flows using two-color laser-induced fluorescence
文献类型：期刊论文
| 作者 | Li, Xin1,2; Chen XY(陈西雨)1,2; Li JW(栗继伟)2; Wang YJ(王业军)2; Wang Q(汪球)2; Zhao W(赵伟)1,2 |
| 刊名 | APPLIED THERMAL ENGINEERING
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 272页码:12 |
| 关键词 | Film cooling Two-color laser-induced fluorescence Film thickness Thermometry Microfluidic flow |
| ISSN号 | 1359-4311 |
| DOI | 10.1016/j.applthermaleng.2025.126451 |
| 通讯作者 | Wang, Yejun(wangyejun@imech.ac.cn) |
| 英文摘要 | Film cooling, an effective method for reducing aerodynamic heat encountered in hypersonic flights, involves the ejection of liquid coolant through discrete slots. This process forms a liquid film on the external surface that removes the heat via convection. A comprehensive exploration of the interactions between the liquid film and high-speed crossflows could significantly inform the design of film cooling systems. For this purpose, this work investigates the quantitative characterization of the liquid film in microfluidic flows using two-color laserinduced fluorescence (2c LIF). Temperature-sensitive rhodamine B (RhB) and temperature-insensitive sulforhodamine 101 (SRh101) dissolved in deionized water are employed to simultaneously determine 2D temperature and liquid film thickness. As dye concentration increases, absorption linearly strengthens while the fluorescence intensity initially increases but subsequently deviates from the linear relationship. The associated spectra exhibit a red-shift toward longer wavelengths. A similar pattern is observed with respect to laser pulse energy dependence, although the spectral shift is negligible. As the dye concentration increases from 1 to 10 mg/ L, the calibration of the 2c/1d LIF method reveals temperature sensitivities of approximately - 1.8--2.5 %/degrees C and - 0.04--0.08 %/degrees C for RhB and SRh101, respectively. Moreover, the study introduces two-color/two-dye LIF (2c/ 2d LIF) technique in microfluidic flows, highlighting its potential to mitigate of the reabsorption effect. Beyond the solid-liquid interface, spatially resolved 2D temperature distributions in microfluidic flows reveal that temperature gradually increases and decreases during the cooling and heating processes respectively, with the measurement uncertainty being less than 3.0 %. The measured film thickness aligns well with the manufactured data, and measurement errors decrease noticeably as film thickness increases. These results highlight the potential application of the 2c LIF technique in exploring the interactions between liquid coolants and high-speed crossflows for fundamental research purposes. |
| 分类号 | 一类 |
| WOS关键词 | HEAT-TRANSFER ; RHODAMINE-B ; CHANNEL |
| 资助项目 | National Natural Science Foundation of China[12272386] ; National Key Research and Development Program of China[2023YFF0718701] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB1050000] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001471360100001 |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 其他责任者 | 王业军 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101091]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li, Xin,Chen XY,Li JW,et al. Simultaneous measurements of liquid film thickness and 2D temperature distribution in microfluidic flows using two-color laser-induced fluorescence[J]. APPLIED THERMAL ENGINEERING,2025,272:12. |
| APA | Li, Xin,陈西雨,栗继伟,王业军,汪球,&赵伟.(2025).Simultaneous measurements of liquid film thickness and 2D temperature distribution in microfluidic flows using two-color laser-induced fluorescence.APPLIED THERMAL ENGINEERING,272,12. |
| MLA | Li, Xin,et al."Simultaneous measurements of liquid film thickness and 2D temperature distribution in microfluidic flows using two-color laser-induced fluorescence".APPLIED THERMAL ENGINEERING 272(2025):12. |
入库方式： OAI收割
来源：力学研究所
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