CAJ | 학술논문

研究微通道中的气体混合对于微尺度下非预混燃烧的探索具有重要意义。利用直接模拟蒙特卡罗法，采用变径软球模型，数值模拟了高度为1,μm的Y型微通道内CO和O2两种气体的混合过程。结果表明，气体混合过程主要发生在Y型微通道接合区；混合长度会随壁面温度的升高而减小，随入流速度的增大而增长；当支通道夹角较大时，夹角的变化对混合过程影响较小，而当支通道夹角较小时，混合效率将随夹角的减小而明显增强。
연구미통도중적기체혼합대우미척도하비예혼연소적탐색구유중요의의。이용직접모의몽특잡라법，채용변경연구모형，수치모의료고도위1,μm적Y형미통도내CO화O2량충기체적혼합과정。결과표명，기체혼합과정주요발생재Y형미통도접합구；혼합장도회수벽면온도적승고이감소，수입류속도적증대이증장；당지통도협각교대시，협각적변화대혼합과정영향교소，이당지통도협각교소시，혼합효솔장수협각적감소이명현증강。
Studying gas mixing in micro-channel is of great significance for the exploration of non-premixed micro-scale combustion. The mixing processes of CO/O2 in a Y-shaped micro-channel with a height of 1,μm were numeri-cally simulated using the direct simulation Monte Carlo(DSMC)method and variable soft sphere(VSS)model. The results show that gas mixing process mainly occurs at the junction of Y-shaped micro-channel. The mixing length de-creases monotonously with the increase of wall temperature while increases linearly with the increase of inflow rate. Additionally,when the branch angle in large value changes,it has little influence on the mixing process,but when the branch angle in small values changes,the efficiency of gas mixing would become significantly higher with the decrease of branch angle.