华中科技大学学报（自然科学版）2024，Vol.52Issue(7)：92-98,7.DOI:10.13245/j.hust.240480
努森压缩机粗糙微通道流动及增压性能研究
Study on rough microchannel flow and pressurization performance of Knudsen compressor
摘要
Abstract
The models of Knudsen compressors with different rough wall microchannels were established.The effects of rough shape,rough element period,and rough element height on the flow and pressurization performance of the microchannel were studied from the flow mechanism by the numerical method of the slip boundary.The results show that the factors affecting the thermal transpiration flow on sinusoidal,rectangular,and random walls are the temperature gradient per unit length along the sinusoidal wall path,the low velocity vortices at the depression and the interface,and the temperature gradient per unit length along the random wall path,respectively.The thermal transpiration flow and pressurization performance of sinusoidal and rectangular wall microchannels increase with the increase of roughness element period and decrease with the increase of roughness element height.The ability of sinusoidal rough wall to resist the decrease of pressurization performance is stronger than that of rectangular rough wall under the same roughness element period or height.关键词
努森压缩机/微通道/粗糙元/热流逸流/增压性能Key words
Knudsen compressor/microchannel/rough element/thermal transpiration flow/pressurization performance分类
机械制造引用本文复制引用
兰江,谢军龙,叶建军,张靖宇..努森压缩机粗糙微通道流动及增压性能研究[J].华中科技大学学报（自然科学版）,2024,52(7):92-98,7.基金项目
国家自然科学基金资助项目(51976067) （51976067）
云南省教育厅科学研究基金资助项目(2022J1015). （2022J1015）
