柔性基底表面液滴蒸发传热特性实验研究OA
Experimental study on heat transfer characteristics of droplet evaporation on flexible substrate surfaces
液滴在柔性基底上的蒸发现象广泛存在于柔性电子设备、生物医学等领域,其传热机理研究对设备散热设计具有重要指导意义.选取正戊烷为工质,在固化比为10∶1和50∶1的PDMS基底上开展蒸发实验,分析了表面柔性特性对液滴蒸发过程中界面温度及热通量分布的影响.实验采用非接触式温敏漆获取温度场分布,建立一维非稳态导热模型计算固-液界面热通量,并结合红外相机观测结果进行对照验证.结果表明,相较于固化比为10∶1的柔性基底,液滴在固化比为50∶1的PDMS基底表面上的蒸发速率更快,平均温度降低0.7％～1.6％,平均热通量增大16％～25％.
The evaporation phenomenon of droplets on flexible substrates is widely found in flexible electronic devices,biomedicine,and other fields.Research on its heat transfer mechanism is of great guiding significance for the heat dissipation design of equipment.In this paper,n-pentane is selected as the working fluid,and evaporation experiments are carried out on PDMS substrates with curing ratios of 10∶1 and 50∶1 to analyze the influence of surface flexibility on the distribution of interfacial temperature and heat flux during droplet evaporation.A non-contact temperature sensitive paint(TSP)is used to obtain the temperature field distribution,and a one-dimensional unsteady heat conduction model is established to calculate the heat flux at the solid-liquid interface,which is verified by comparison with the observation results of an infrared camera.The results show that compared with the flexible substrate with a curing ratio of 10∶1,the droplets evaporate faster on the PDMS substrate surface with a curing ratio of 50∶1,with the average temperature decreasing by 0.7％—1.6％and the average heat flux increasing by 16％—25％.
刘璐;李玉平;熊巧铃;王腾
华北电力大学燕赵电力实验室,河北保定 071003||华北电力大学动力工程系,河北保定 071003||河北省储能技术与能源综合利用重点实验室,河北保定 071003华北电力大学动力工程系,河北保定 071003华北电力大学动力工程系,河北保定 071003华北电力大学燕赵电力实验室,河北保定 071003||华北电力大学动力工程系,河北保定 071003||河北省储能技术与能源综合利用重点实验室,河北保定 071003
数理科学
柔性基底温敏漆液滴蒸发温度分布
flexible substratetemperature sensitive paintdroplet evaporationtemperature distribution
《化工学报》 2026 (4)
1865-1874,10
国家自然科学基金项目(51876065,52306196)河北省自然科学基金项目(E2025502083)
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