Convection heat transfer (including natural and forced convection) ofelliptical tubes had been studied systematically. The experienced formula of heattransfer had been given. It presents fin efficiency of rectangular finned elliptical tubeand optimized fin geometry (i.e. length/width ratio) and fin spacing for rectangularfin.

A reconstruction algorithm, the simultaneous algebraic reconstruction technique(SART), proposed by Anderson (1984) is discussed. SART can be applied to optical tomographyto determine quantitatively or to reconstruct the 3-D asymmetric temperature distribution or therefractive-index field of a transparent medium. With two orthographic-view directions and limitedview- ranges, the reconstruction speed and the accuracy of the SART are adequate. By the use oforthographic double-beam holographic interferometry with double exposures and the SART, thetemperature distribution of a 3-D asymmetric heat air-fiow field can be successfully andquantitatively reconstructed. (12 refs.)

从理论上分忻了影响沸腾传热特性的各种因素，以间隙为l~2mm的环形狭缝通道中流动沸腾传热的实验数据为基础，给出了三种计算环形狭缝中流动沸腾传热的准则关系式。分别将计算结果与实验数据进行了比较，找出了影响狭缝中沸腾传热的关键因素，确定了可以用来预测该实验范围内的流动沸腾传热的准则关系式。

引入三个形状因子和一个体积参数之后，对二维轴对称几何形状下的内部和外部接触熔化过程进行了统一的数学分忻，得到接触熔化速率的一般表达式并分别与六种典型几何形状下现有的分忻结果相对比，对该表达式的正确性进行了验证。此外，对其局限性进行了简要讨论。

采用单颗粒动力学模型及自行研制的计算机程序对波形板汽水分离器中液滴的运动轨迹进行了数值模拟计算，通过对波形板中液滴轨迹的数值模拟可以为优化波形板结构提供理论依据。