纳米Janus颗粒对池沸腾传热影响研究  

Research on the Effect of Nano Janus Particles on Pool Boiling Heat Transfer

作　　者：杨聿昊 纪献兵[1,2] 任纪星 张喆[1] 徐进良[1,2] YANG Yuhao;JI Xianbing;REN Jixing;ZHANG Zhe;XU Jinliang(Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy,North China Electric Power University,Beijing 102206,China;Key Laboratory of Power Station Energy Transfer Conversion and System,Ministry of Education,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学低品位能源多相流与传热北京市重点实验室,北京102206 [2]华北电力大学电站能量传递转化与系统教育部重点实验室,北京102206

出　　处：《工程热物理学报》2025年第3期866-871,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.52176154,No.52130608)。

摘　　要：为探究纳米Janus颗粒对沸腾传热的影响,使用Pickering乳液法制备了Fe_(3)O_(4)-SiO_(2)亲水、疏水及Janus纳米颗粒,并进行了池沸腾实验。研究发现,添加Fe_(3)O_(4)-SiO_(2)纳米Janus颗粒可显著强化沸腾传热,沸腾起始点过热度△Tstart仅为2.7 K,相较于光表面的7.7 K,△Tstart降低了5.0 K,同时临界热流密度CHF增加54.1%,沸腾传热系数h最大可增加19%。由于纳米流体存在沉积问题,对沉积层表面进行了沸腾传热研究,发现Janus颗粒沉积层沸腾传热性能皆优于光表面和亲、疏水性颗粒沉积层,其中相比于光表面,Janus颗粒沉积层CHF增加38.5%,h最大增加11%。In order to explore the influence of nano Janus particles on boiling heat transfer,we used Pickering lotion method to prepare Fe_(3)O_(4)-SiO_(2) Janus nanoparticles and hydrophilic/hydrophobic nanoparticles,then we carried out pool boiling experiments.Research has found that adding Fe_(3)O_(4)-SiO_(2) nano Janus particles can significantly enhance boiling heat transfer,the superheat degree△Tstart at the starting point of boiling is 2.7 K,compared to 7.7 K on smooth surface,△Tstart decreased by 5.0 K,while the critical heat flux(CHF)increased by 54.1%,and the maximum boiling heat transfer coefficient(h)can be increased by 19%.Due to the deposition problem of nanofluids,we conducted pool boiling experiments on the surface with deposition layer.It was found that the boiling heat transfer performance of Janus particle deposition layer was superior to that of smooth surface and hydrophilic/hydrophobic particle deposition layer.Compared to the smooth surface,the CHF of Janus particle deposition layer increased by 38.5%,and h increased by 11%.

关 键 词：Janus颗粒 池沸腾 沉积层 纳米流体 可视化 

分 类 号：TK124[动力工程及工程热物理—工程热物理]