Laboratory of Energy Carbon Neutrality, School of Electrical Engineering, Xinjiang University
Engineering Research Center of Northwest Energy Carbon Neutrality, Ministry of Education, XinjiangUniversity
Center of New Energy Research, School of Future Technology,Xinjiang University

颗粒物在换热通道内的沉积会显著降低换热效率。 为了提高换热器的性能,更好地理解颗粒物在换热通道中的沉积特性对于提高换热器性能至关重要。 利用雷诺应力模型(RSM)和离散颗粒模型(DPM)对三维凹凸酒窝通道中颗粒的沉积特性进行了模拟。 在网格无关性测试和数值验证之后,对凹凸酒窝通道中的流动结构、二次流、温度分布和颗粒沉积分布进行了分析和研究。 研究结果表明,影响颗粒在凹凸酒窝通道中沉积特性的主要机制是重力、热泳力、湍流结构、二次流和颗粒惯性,这些机制的影响随颗粒大小的变化而显著改变。 对于小颗粒(dp≤10 μm),凹凸酒窝结构的存在会促进沉积;但对于大颗粒(dp >10 μm),凹凸酒窝结构的存在只会对颗粒沉积位置的分布产生很小的影响。

The deposition of particulate matter in heat exchanger channels can greatly reduce their heattransfer efficiency, and a better understanding of the deposition characteristics of particulate matter inheat exchanger channels is essential for improving heat exchanger performance. The deposition charac⁃teristics of particles in a three-dimensional dimpled dimple channel were simulated using the ReynoldsStress Model (RSM) and Discrete Particle Model (DPM). The flow structure, secondary flow, temper⁃ature distribution and particle deposition distribution in the dimpled dimple channel were analyzed andinvestigated after mesh -independence testing and numerical validation. The results showed that themain mechanisms affecting the particle deposition characteristics in dimpled dimple channels were grav⁃ity, thermophoretic forces, turbulent flow structure, secondary flow and particle inertia, and the effectsof these mechanisms change significantly with particle size. For small particles ( dp ≤ 10 μm), thepresence of the dimpled dimple structure promoted deposition; however, for large particles ( dp > 10μm), its presence had only a small effect on the distribution of particle deposition locations.

国家海外高层次人才计划、国家自然科学基金(No.52266017);国家社会科学基金重大项目(No.21&ZD133)

韩尊师, 卢浩, 赵文君, 等. 凹凸酒窝表面换热管道内颗粒沉积与传热特性的数值模拟研究[J]. 能源环境保护, 2023, 37(5): 201-208.

HAN Zunshi, LU Hao, ZHAO Wenjun, et al. Numerical simulation study of particle deposition and heat transfercharacteristics in heat transfer pipes with dimpled dimple surface[J]. Energy Environmental Protection, 2023, 37(5): 201-208.