MATLAB辅助化工原理教学的探讨

探讨了MATLAB软件在化工原理教学中的应用价值,说明了采用MATLAB软件的数值分析函数和脚本文件数值求解化工原理问题的意义．提出了用户交互界面和Notebook在化工原理教学中的使用方法,并分析了MATLAB在化工原理课程设计中的辅助作用。     

解放自卸车自身缺陷的补救

1999年春，我市购进了大量的长春“一汽”生产的解放平头自卸车(其中包括15吨CA3260解放平头自卸车，8吨CA3160解放平头自卸车)。通过使用新购的解放平头自卸车发现了一些与公路施工与运输不相适应的结构设计，比如：15吨自卸车中冷器位置过低，在运行过程中遇到障碍造成中冷器的损坏；8吨自卸车空气滤清器的过滤效果差。     

Modified model of bubble formation in non-Newtonian fluids

Based on the comprehensive forces balance model,a modified model of the formation of a single bubble in non-Newtonian fluid under constant flowrate was developed by taking account of the effect of the ingoing gas through orifice as well as its variation OH the radial expansion of bubble.The modified model involves the radial expansion equation of bubble surface and the forces balance equation in vertical direction of the bubble respectively.The shape variation of bubbles formed in polyacrylamide(PAM)aqueous solutions under various conditions was predicted numerically.The practical formation of bubbles was real-time visualized and recorded by a CCD camera and a computer by means of a special laser image measurement system.Results show that the predicted shapes of the bubbles by the present model agree well with experimental observation.