旋流闪急干燥器的流体力学实验研究

旋流闪急干燥器开发于本世纪70年代初,在国内由天津大学首创,但在国外阐述该型干燥器机理及设计的文献,其为少见。本文在无固本颗粒的情况下对旋流闪急干燥器干燥室内气体流动速度分布和压力进行一些实验测定和分析。     

气力输送的最佳速度与管径计算

本文基于气固混合物管流中颗粒群运动方程和一般压降表达式，利用极值条件，发展了气力输送的最佳气流速度和最佳管径的工程计算方法，其结果与实验比较，符合良好。     

MHDP试验船激光测速系统

近几年来激光在准直和测量仪器中的应用越来越广泛。本文和可见光二极管激光器设计了激光光电传感器,马这种传感器应用于超导电磁推进（ＭＨＤＰ）试验船的航行试验中,开发了一种经济实用的激光测速系统。该传感器亦可用于机动车车型及数量检测等其它应用中。     

Dynamic crack propagation and unloading behavior of brittle polymers

The method of caustics in combination with a Cranz–Schardin high-speed camera was utilized to study dynamic crack propagation and unloading behavior of epoxy, PMMA and Homalite-100 specimens. Dynamic stress intensity factor K _ID and crack velocity were evaluated in the course of crack propagation. Caustic patterns at the loading points were also recorded to estimate load P applied to the specimen. Unloading rate , the time derivative of P, was determined as a function of time t, and its time correlation with K _ID or was examined. The findings showed that the change in was qualitatively in accord with the change in K _ID or . However, there existed slight differences among the values of t giving the maximum , and K _ID, so that their order was , and K _ID. This revised version was published online in July 2006 with corrections to the Cover Date.     

基于Gurney假设的一种非对称型战斗部破片初速计算

针对一种特定的非对称型战斗部，利用Gurney假设推导出破片平均初速计算式，计算结果有一定的准确度．表明一定条件下Gurney假设仍可适用于非对称型战斗部的工程实践中。     

河道对爆破地震波传播规律的影响分析

跨河道传播爆破地震波的问题在水电工程建设中较常见,通过理论分析,计算了爆破地震波通过河道水体时的透反射情况,通过动力有限元数值模拟,讨论了河道内有水和无水两种情况下,地震波通过基岩传播引起的两岸地面质点及河道表面质点的峰值震速分布情况.通过数值模拟结果可知,在爆破地震波跨河道传播中,不考虑水体影响时岩体内各点的峰值震速较考虑水体影响情况下的峰值要大.理论计算结果和不考虑水体影响时的数值计算结果是偏于安全的.     

三聚氰胺反应器气体停留时间的探讨

分别从三聚氰胺反应机理和化学动力学的角度出发，讨论了三聚氰胺流化床反应器中气体流动状态和停时间和简化计算方法，指出影响三聚氰胺反应转化率和选择性的诸多因素，并就硅铝催化剂在三聚氰胺工业生产使用中应注意的问题提出了行之有效的建议。     

全光纤VISAR系统中条纹常数的分析

全光纤VISAR系统具有大的测速范围,其测速的动态范围和条纹常数有关。从干涉光路的实现原理出发,推导出速度与条纹常数的关系式,并分析了FVISAR系统不同速度分档下的条纹常数确定。在保证1．5％精度及假设光源相干长度为1 mm的前提下,给出了具体的速度分档情况。     

Carrier-concentration dependence of velocity-field characteristics in ln0.53Ga0.47 as

The doping dependence of the velocity-field characteristic in InGaAs has been investigated by an analysis of measurements with transferred-electron devices. The electron peak velocity has been determined directly as a function of electron concentration and low-field mobility. The carrier-concentration dependence of the velocity-field characteristic has been deduced by comparing experimental and theoretical transient device behaviour. The experimental results support a theoretical approach for the velocity-field characteristic which has been proposed recently.     

黑索今两种压药方式的比较

该文从药柱装填密度、密度梯度等方面进行分析,讨论了黑索今压药方式对雷管起爆威力的影响,建议采用定压压药方式压制黑索今药柱.