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

作　　者：兰江 谢军龙[1] 叶建军[1] 张靖宇 LAN Jiang;XIE Junlong;YE Jianjun;ZHANG Jingyu(School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan,430074,China;School of Mathematics and Physics,West Yunnan University,Lincang 677000,Yunnan China)

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074 [2]滇西科技师范学院数理学院,云南临沧677000

出　　处：《华中科技大学学报（自然科学版）》2024年第7期92-98,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51976067);云南省教育厅科学研究基金资助项目(2022J1015).

摘　　要：建立了不同粗糙壁面微通道努森压缩机模型.采用滑移边界的数值方法,从流动机理出发研究了粗糙形状、粗糙元周期和粗糙元高度对微通道流动及增压性能的影响.研究表明:影响正弦、矩形、随机壁面热流逸流的因素分别为沿正弦壁面路径单位长度的温差梯度、凹陷处和交界面的低速涡旋、沿随机壁面路径单位长度的温差梯度.正弦和矩形壁面微通道的热流逸流和增压性能随粗糙元周期增加而增大,随粗糙元高度增加而减小.相同粗糙元周期或高度下,正弦壁面抵抗增压性能下降的能力比矩形壁面更强.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 

分 类 号：TH48[机械工程—机械制造及自动化]