The flow characteristics of laminar flow in different width - height ratio ( the height stayed at 1 . 0mm ) also varied , which were determined by the characteristic scale ( such as equivalent diameter ) . compared with the laminar theoretic value , the experimental friction factor reduced when the scale dropped down 横截面宽高比(高度1 . 0mm )不同，微小通道在层流区的流动特性也有所不同，微小通道流动特性取决于通道特征尺度(如：当量直径)的大小，摩擦系数随尺度减小而减小。
The research shows that : 1 ) the ductility of the hsc bending members constructed is much greater than 5 ; 2 ) increasing the vertical links and distribution steel can increase the deflection under ultimate moment ; 3 ) with appropriate compressive bars , vertical links and distribution steel the increase of moment after yield and the decrease of moment under ultimate moment can be ignored , so the ductility of the hsc bending member is much larger ; 3 ) the width / depth ratio of hsc bending member has no obvious effect on the ultimate compressive strain of concrete ; 4 ) the method used here to calculate the deflection is applicable ; 5 ) the location of crack coincides with the location of vertical links and distribution steel ; 6 ) the bending property of the hsc structure under the blast load can meet the demand of protective engineering 研究表明：本文研究的梁、板构件的延性比远大于5 ；增加箍筋(钩筋、分布筋)含量，可以提高压区混凝土剥落时的挠度；在适当的受压筋、箍筋(钩筋、分布筋)含量下，可以忽略压区混凝土剥落瞬间的承载力下降，从而大大提高构件的延性；受弯构件的宽高比对压区混凝土极限应变的影响不明显；受弯构件的裂缝间距受箍筋(钩筋、分布筋)的布置影响；文中所用的承载力和变形计算方法是可行的。化爆试验表明，高强混凝土构件的动载抗弯性能能够满足防护结构的要求。
I setted up the physical modele and calculation - domain for the conviction heat transfer enchancement by the longitudinal vortex , and did the numerical value simulation for the chang of the velocity filed and temperature filed which influnced by lvg . at the same time , i studied the generation develepment of the longitudinal and its mechanism for the heat transfer enchancement . by the analycise of the result , i got the pricipium rule of how the size , ratio corner and distence of the lvg have influence on the generation and develepment of longitudinal vortex , and gave out the relative construct parameter scope 通过对phoenics软件进行应用开发，本文建立了涡旋强化换热的物理模型和计算域，对扰流元作用下的流动速度场和温度场的变化进行了数值模拟，研究了纵向涡旋发生发展及其强化对流换热的机理。初步得出了扰流元的有关结构参数如总体尺寸、宽高比、攻角、间距等因素对涡流发生发展的影响规律，并给出了有关结构参数的取值范围。
