【摘 要】
：
采用不同滑移连续介质模型,考虑不同的进出口压比、长宽比和出口压力,对微通道中低马赫数的氦气流和氮气流进行数值分析,并采用小扰动分析方法给出不同阶滑移条件所对应的流
【机 构】
：
中国电子科技集团公司第三十八研究所,中国科学技术大学热科学和能源工程系
论文部分内容阅读
采用不同滑移连续介质模型,考虑不同的进出口压比、长宽比和出口压力,对微通道中低马赫数的氦气流和氮气流进行数值分析,并采用小扰动分析方法给出不同阶滑移条件所对应的流场理论解,用实验结果和DSMC方法在不同努森数区域中检验理论模型.研究表明,滑移模型能很好地描述微通道流的可压缩效应、稀薄效应以及热蠕动效应;与一阶滑移模型相比,稀薄效应在高阶滑移模型中影响略弱;努森数和雷诺数分别表征稀薄效应和热蠕动效应的强弱;滑移的连续介质模型适用于努森数小于0.15的氮气流动,而高阶滑移模型在努森数小于0.08的滑移流区域效果更好;在努森数大于0.2的过渡区,滑移模型明显低估了稀薄效应.
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