化工学报Issue(6)：2062-2069,8.DOI:10.11949/j.issn.0438-1157.20141915
加热功率对三角形微肋阵内流动与对流换热特性的影响
Effect of different heating power on flow and convective heat transfer characteristics of triangle micro pin fins
摘要
Abstract
Flow and convective heat transfer characteristics of the triangle micro pin fins (d=247μm, H=500μm) using de-ionized water as working fluid were experimentally investigated. The change rules of pressure drops, friction factors and Nusselt numbers etc. in triangular micro pin fins were measured when Reynolds number changed from 0—1000 with different heating power of 50, 100 and 150W, respectively. In addition, the influence of heating power on flow resistance and convective heat transfer of triangular micro pin fins was analyzed. The experimental results illustrated that the friction factors of the triangle micro pin fins increase markedly with the increase of heating power at Re<250 and the increment of friction factors reached more than 200%, while the effect of heating power was significantly reduced at Re>250 and the value of f almost no longer changed with increasing heating power after Re>600. The convective heat transfer in triangular micro pin fins was enhanced by increasing heating power at Re<250 and the increment of Nusselt number at the same Re could reach more than 75%. However, this enhancement was weakened by the vertex evolution in wake zones of triangular micro pin fins and the Nu became smaller with the increase of heating power when Re>250.关键词
微肋群/加热功率/Reynolds数/摩擦阻力系数/Nusselt数/流动/对流/实验验证Key words
micro pin fins/heating power/Reynolds number/friction factor/Nusselt number/flow/convection/experimental validation分类
能源科技引用本文复制引用
邱德来,管宁,张承武,赵孝保,刘志刚..加热功率对三角形微肋阵内流动与对流换热特性的影响[J].化工学报,2015,(6):2062-2069,8.基金项目
国家自然科学基金项目（51306107）；山东省自然科学基金项目（ ZR2012EEQ015）；山东省科技发展计划项目（2014GGX104008）；江苏省能源系统过程转化与减排技术工程实验室项目。@@@@supported by the National Natural Science Foundation of China (51306107), the Natural Science Foundation of Shandong Province (ZR2012EEQ015), the Shandong Province Science and Technology Development Plans (2014GGX104008), and the Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province （51306107）
