机加工铜表面可视化池沸腾传热特性实验研究  

Experimental Study on Visualized Pool Boiling Heat Transfer Characteristics of Machined Copper Surface

作　　者：战洪仁[1] 李帅[1] 章港 史胜 金志浩[1] ZHAN Hongren;LI Shuai;ZHANG Gang;SHI Sheng;JIN Zhihao(Shengyang University of Chemical Technology,Shenyang 110142,China;China Energy Construction Group Northeast Power First Engineering Co.Ltd,Shenyang 110179,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,辽宁沈阳110142 [2]中国能源建设集团东北电力第一工程有限公司,辽宁沈阳110179

出　　处：《沈阳化工大学学报》2024年第3期248-253,共6页Journal of Shenyang University of Chemical Technology

基　　金：国家自然科学基金(11672189)。

摘　　要：在标准大气压下,采用经机械加工得到的不同粗糙度铜基表面的紫铜棒在自主设计制造的实验台上进行可视化池沸腾实验,使用高级摄像机记录铜基表面气泡的产生、生长和脱离的沸腾过程,同时用数据采集器记录铜棒不同节点处的温度.经过对比分析得出了光滑表面与不同粗糙程度的机械加工表面的换热特性.结果发现:在低热流密度时,光滑表面最先沸腾,其次是相对较宽的螺纹槽表面开始沸腾;在高热流密度时,槽宽0.3 mm的铜表面气泡脱离频率最快,换热效果最好,槽宽0.1 mm的铜表面产生的气泡较大,脱离频率相对较慢,总体上经机械处理后的表面的气泡脱离频率均强于未经处理过的光滑表面的.对实验数据进行处理,整理出了不同表面对临界热流密度和传热系数的影响趋势.Under normal atmospheric pressure,a visual pool boiling experiment was conducted on a self-designed and manufactured experimental platform using copper rods with different roughness copper based surfaces obtained through mechanical processing.Advanced cameras were used to record the boiling process of bubble generation,growth,and detachment on the copper based surface,while data collectors were used to record the temperature at different nodes of the copper rod.The heat transfer characteristics between smooth surface and machined surface with different roughness degree are obtained through comparative analysis.It is found that at low heat flux,the smooth surface begins to boil first,followed by the relatively wide threaded groove surface.At a high heat flux,the copper surface with a groove width of 0.3 mm had the fastest bubble detachment frequency and the best heat transfer effect.The copper surface with a groove width of 0.1 mm had a larger bubble detachment frequency and a slower one.However,overall comparison showed that the bubble detachment frequency after mechanical treatment was stronger than that of the smooth surface without processing.Finally,the influence trend of different surfaces on the critical heat flux and heat transfer coefficient is sorted out by processing the laboratory data.

关 键 词：机械加工表面 池沸腾 热流密度 传热系数 

分 类 号：TF741.333[冶金工程—钢铁冶金]