Study on evaporation heat transfer characteristics of sessile droplets based on temperature measurement of double layer temperature sensitive paint
-
摘要: 温敏漆测温作为新型的非接触式测温方法，具有成本低、响应快等优点。本文采用了基于双层温敏漆的测温技术以研究固着液滴蒸发的传热特性。通过双层温敏漆测温，分别得到液滴与加热基底接触面以及基底背部的温度分布，构建一维非稳态导热反问题模型，获得液滴与基底接触面处的热流密度分布。研究结果表明，液滴汽化过程可以分为三个阶段：初始加热阶段，对流单元蒸发阶段和薄膜蒸发阶段。在初始加热阶段，热流密度迅速上升。在对流单元蒸发阶段，热流密度逐渐减小后基本维持不变。在薄膜蒸发阶段，由于液膜较薄，汽化增强，热流密度先增大，随液滴即将完全蒸发，其热流密度又迅速减小。通过校核液滴蒸发换热量，验证了本文实验方法的可靠性，本文研究成果有助于拓宽相变传热热流密度的实验测量方法。Abstract: As a new non-contact temperature measurement method, temperature sensitive paint has the advantages of low cost and fast response. In this paper, a temperature measurement technology based on double layer temperature sensitive paint was used to study the heat transfer characteristics of sessile droplet evaporation. The temperature distributions at the contact surface between the droplet and the heating substrate and at the back of the substrate were obtained by measuring the temperature with a double-layer temperature sensitive paint. A one-dimensional unsteady inverse heat conduction model was established to obtain the heat flux distribution at the interface between the droplet and the heating substrate. The results show that the droplet vaporization process can be divided into three stages: initial heating stage, convection unit evaporation stage and film evaporation stage. In the initial heating stage, the heat flux increases rapidly. In the convection unit evaporation stage, the heat flux decreases gradually and remains basically unchanged. In the film evaporation stage, the heat flux first increases, and then decreases rapidly as the droplet almost completely evaporates. The reliability of the experimental method is verified by checking the heat quantity of droplet evaporation. The research results in this paper are helpful to broaden the experimental measurement method of heat flux during phase change heat transfer.
-
图 2 温敏漆的激发光谱与发射光谱
Figure 2. Excitation spectrum and emission spectrum of temperature sensitive paint
图 3 温敏漆光强-温度标定曲线
Figure 3. Calibration curve of light intensity temperature of temperature sensitive paint
图 6 正戊烷液滴蒸发的俯视图、上表面温度分布图、下表面温度分布图和热流密度分布图
Figure 6. Top view, upper surface temperature distribution, lower surface temperature distribution and heat flux distribution of n-pentane droplet evaporation
图 8 液滴接触面径向温度分布随时间变化
Figure 8. Change of radial temperature distribution on droplet contact surface with time
图 9 液滴接触面热流密度分布随时间的变化
Figure 9. Variation of Heat Flux Distribution on Droplet Contact Surface with Time
-
[1] 靳思宇, 李一兴, 翁史烈. 逆流式喷雾场中气液两相流温度测量装置[J]. 实验流体力学, 2008, 22(4): 63–67. doi: 10.3969/j.issn.1672-9897.2008.04.014JIN S Y, LI Y X, WENG S L. Device for temperature measurement in counter-current gas-liquid spraying field[J]. Journal of Experiments in Fluid Mechanics, 2008, 22(4): 63–67. doi: 10.3969/j.issn.1672-9897.2008.04.014 [2] 董彬, 孙权, 高春艳, 等. 动力电池喷雾冷却换热特性研究[J]. 工程热物理学报, 2022, 43(6): 1588–1595.DONG B, SUN Q, GAO C Y, et al. Study on spray cooling heat transfer performance of power battery[J]. Journal of Engineering Thermophysics, 2022, 43(6): 1588–1595. [3] XUE S D, XI X, LAN Z, et al. Longitudinal drift behaviors and spatial transport efficiency for spraying pesticide droplets[J]. International Journal of Heat and Mass Transfer, 2021, 177: 121516. doi: 10.1016/j.ijheatmasstransfer.2021.121516 [4] ZHENG L, CHENG X J, CAO L D, et al. Enhancing pesticide droplet deposition through O/W Pickering Emulsion: Synergistic stabilization by Flower-like ZnO particles and polymer emulsifier[J]. Chemical Engineering Journal, 2022, 434: 134761. doi: 10.1016/j.cej.2022.134761 [5] SANTANGELO P E, ROMAGNOLI M, PUGLIA M. An experimental approach to evaluate drying kinetics and foam formation in inks for inkjet printing of fuel-cell layers[J]. Experimental Thermal and Fluid Science, 2022, 135: 110631. doi: 10.1016/j.expthermflusci.2022.110631 [6] TOFAN T, JASEVIČIUS R. Modelling of the motion and interaction of a droplet of an inkjet printing process with physically treated polymers substrates[J]. Applied Sciences, 2021, 11(23): 11465. doi: 10.3390/app112311465 [7] PAN Z H, WEIBEL J A, GARIMELLA S V. Transport mechanisms during water droplet evaporation on heated substrates of different wettability[J]. International Journal of Heat and Mass Transfer, 2020, 152: 119524. doi: 10.1016/j.ijheatmasstransfer.2020.119524 [8] TEMBELY M, VADILLO D C, DOLATABADI A, et al. A machine learning approach for predicting the maximum spreading factor of droplets upon impact on surfaces with various wettabilities[J]. Processes, 2022, 10(6): 1141. doi: 10.3390/pr10061141 [9] WANG F, GAO X, XIAO Y C, et al. Thick exchange layer evaporation model with natural convection effect and evaporation experimental study for multicomponent droplet[J]. Chinese Journal of Aeronautics, 2020, 33(7): 1903–1918. doi: 10.1016/j.cja.2020.02.005 [10] HAN T, CHOI Y, NA U, et al. Fast nucleation of water by self-arrangement of hydrophilic crystals on a hierarchically structured surface promoting coalescence-induced droplet jumping[J]. Applied Thermal Engineering, 2021, 198: 117444. doi: 10.1016/j.applthermaleng.2021.117444 [11] JIANG Y N, CHI F X, CHEN Q S, et al. Effect of substrate microstructure on thermocapillary flow and heat transfer of nanofluid droplet on heated wall[J]. Microgravity Science and Technology, 2021, 33(3): 37. doi: 10.1007/s12217-021-09888-2 [12] LEE H J, CHOI C K, LEE S H. Local heating effect on thermal Marangoni flow and heat transfer characteristics of an evaporating droplet[J]. International Journal of Heat and Mass Transfer, 2022, 195: 123206. doi: 10.1016/j.ijheatmasstransfer.2022.123206 [13] GIBBONS M J, DI MARCO P, ROBINSON A J. Local heat transfer to an evaporating superhydrophobic droplet[J]. International Journal of Heat and Mass Transfer, 2018, 121: 641–652. doi: 10.1016/j.ijheatmasstransfer.2018.01.007 [14] TAROZZI L, MUSCIO A, TARTARINI P. Experimental tests of dropwise cooling on infrared-transparent media[J]. Experimental Thermal and Fluid Science, 2007, 31(8): 857–865. doi: 10.1016/j.expthermflusci.2006.09.005 [15] RICHARDS C D, RICHARDS R F. Transient temperature measurements in a convectively cooled droplet[J]. Experiments in Fluids, 1998, 25(5): 392–400. doi: 10.1007/s003480050246 [16] HASHIMI H A, KIM J. Quantum dot temperature sensor ab initio test: droplet vaporization heat transfer[C]// Proceedings of the ASME 2016 Heat Transfer Summer Conference. 2016. [17] LIU T S, SULLIVAN J P. Pressure and temperature sensitive paints[M]. Berlin: Springer, 2005. [18] Liu T S, CAMPBELL B T, SULLIVAN J P. Fluorescent paint for measurement of heat transfer in shock - turbulent boundary layer interaction[J]. Experimental Thermal and Fluid Science, 1995, 10(1): 101–112. doi: 10.1016/0894-1777(94)00068-J [19] LIU T S, CAMPBELL B T, BURNS S P, et al. Temperature- and pressure-sensitive luminescent paints in aerodynamics[J]. Applied Mechanics Reviews, 1997, 50(4): 227–246. doi: 10.1115/1.3101703 [20] FRANCOM M, KIM J. Experimental investigation into the heat transfer mechanism of oscillating heat pipes using temperature sensitive paint[J]. Journal of Heat Transfer, 2021, 143(4): 041901. doi: 10.1115/1.4049512 [21] HIRAI Y, MALLETTE A, NISHIO Y, et al. Visualization of icing of supercooled water using Tb(III)-based temperature-sensitive paint[J]. Sensors and Actuators A:Physical, 2019, 285: 599–602. doi: 10.1016/j.sna.2018.11.051 [22] AL HASHIMI H, HAMMER C F, LEBON M T, et al. Phase-change heat transfer measurements using temperature-sensitive paints[J]. Journal of Heat Transfer, 2018, 140(3): 031601. doi: 10.1115/1.4038135 [23] 张扣立, 周嘉穗, 孔荣宗, 等. CARDC激波风洞TSP技术研究进展[J]. 空气动力学学报, 2016, 34(6): 738–743. doi: 10.7638/kqdlxxb-2015.0151ZHANG K L, ZHOU J S, KONG R Z, et al. Development of TSP technique in shock tunnel of CARDC[J]. Acta Aerodynamica Sinica, 2016, 34(6): 738–743. doi: 10.7638/kqdlxxb-2015.0151 [24] 刘旭, 彭迪, 刘应征. 温敏涂料TSP热流密度测量方法及应用[J]. 气体物理, 2020, 5(5): 1–12. doi: 10.19527/j.cnki.2096-1642.0872LIU X, PENG D, LIU Y Z. Methods and applications of heat flux measurement using TSP[J]. Physics of Gases, 2020, 5(5): 1–12. doi: 10.19527/j.cnki.2096-1642.0872 [25] LIU L, ZHANG K Q, LIU H Y, et al. Experimental study on the interfacial heat transfer of sessile droplet evaporation using temperature-sensitive paint[J]. Experimental Thermal and Fluid Science, 2021, 128: 110436. doi: 10.1016/j.expthermflusci.2021.110436 [26] 张凯祺. 基于温敏漆的液滴撞击壁面蒸发过程传热特性研究[D]. 保定: 华北电力大学, 2021.ZHANG K Q. Study of interfacial heat transfer on droplet impacting heated surface evaporation using temperature sensitive paint[D]. Bao Ding: North China Electric Power University, 2021. doi: 10.27139/d.cnki.ghbdu.2021.000203. [27] LORENZ M, HORBACH T, SCHULZ A, et al. A novel measuring technique utilizing temperature sensitive paint—measurement procedure, validation, application, and comparison with infrared thermography[J]. Journal of Turbomachinery, 2013, 135(3): 031003. doi: 10.1115/1.4006638 [28] MOAVENI S, KIM J. An inverse solution for reconstruction of the heat transfer coefficient from the knowledge of two temperature values in a solid substrate[J]. Inverse Problems in Science and Engineering, 2017, 25(1): 129–153. doi: 10.1080/17415977.2016.1161035 [29] GIBBONS M J, DI MARCO P, ROBINSON A J. Heat flux distribution beneath evaporating hydrophilic and superhydrophobic droplets[J]. International Journal of Heat and Mass Transfer, 2020, 148(C): 119093. doi: 10.1016/j.ijheatmasstransfer.2019.119093 [30] GUGGILLA G, NARAYANASWAMY R, PATTAMATTA A. An experimental investigation into the spread and heat transfer dynamics of a train of two concentric impinging droplets over a heated surface[J]. Experimental Thermal and Fluid Science, 2020, 110: 109916. doi: 10.1016/j.expthermflusci.2019.109916 -
下载:
点击查看大图
图(10)
计量
- 文章访问数: 189
- HTML全文浏览量: 97
- PDF下载量: 12
- 被引次数: 0
