初期Taylor弥散实验观察  

Experimental Observation of Early Stage Taylor Dispersion

作　　者：郗大光[1] 陈家骅[2] 王荣生[2] 

机构地区：[1]天津大学,天津300072 [2]大连理工大学,大连116024

出　　处：《实验力学》1993年第1期57-62,共6页Journal of Experimental Mechanics

摘　　要：本文利用激波管所能产生的瞬时定常流场,观察了一种具有间断初始密度分布的物质在这个流场中 Taylor 弥散过程.实验中所测量的物质,是空气中的 CO_2成份;测量手段是红外光谱吸收法;所观察到的过程发生在无量纲时间<0.07的范围内.实验数据与理论结果的比较表明:湍流 Taylor 弥散在初始阶段具有一定的对称性质.Taylor dispersion process of initial density distribution with stepped change was observed in short-duration steady flow field of a shock-tube.The substance measured was the component CO_2 in air.The measurement was carried out by means of infrared spectrums absorption method.The physical process observed in within a duration less than 0.07 dimensionless time.The comparison of measured data with theoretical results shows that turbulent Taylor dispersion is of symmetrical manner in its early stage.

关 键 词：流体力学 湍流 弥散 泰勒弥散 

分 类 号：O357.54[理学—流体力学]