GDI＋和．NET技术在机舱自动化监控系统中的应用

利用最新的．NET技术建立了船舶机舱自动化监控系统方案,介绍了系统的基本组成、功能以及软硬件的设计和实现,并利用GDI＋技术绘制机舱运行参数趋势图。本系统实现了对船舶运行状况的远程监控和故障诊断,大大提高了船舶航行的安全性和自动化水平。     

涡轮特性曲线优化与缸内直喷汽油机排气歧管匹配研究

分别采用4种方法优化了某涡轮增压器特性曲线,并将计算结果与输入的测量点数据进行了对比,确定了适合优化所用涡轮流量-压比曲线的最佳方法。利用AMESim软件建立了某汽油机整机热力学仿真模型,并对该发动机全负荷工况的主要参数进行了标定。将所得涡轮特性曲线用于该涡轮增压汽油机的排气歧管优化匹配研究中。结果表明,合理匹配排气歧管可以使该机中低速扭矩和燃油消耗率分别实现5.2%和5%的改善。     

Numerical modeling of hollow-cone fuel atomization,vaporization and wall impingement processes under high ambient temperatures

In the following paper, a numerical study of the atomization, vaporization and wall impingement processes of hollow-cone fuel spray from high-pressure swirl injectors under various ambient temperature conditions was carried out. Also, the availability of applied models and the effect of ambient temperature on spray characteristics is discussed. The Linearized Instability Sheet Atomization (LISA) model combined with the Aerodynamically Progressed Taylor Analogy Breakup (APTAB) model, the improved Abramzon model and the Gosman model are used to calculate the atomization, vaporization and wall impingement processes of hollow-cone fuel spray, respectively. Spray models are implemented with the modified KIVA code. The calculation results of the spray characteristics under two ambient temperatures, including spray tip penetration, spray structure and radial distance after spray-wall impingement are compared to the experimental results obtained by the Laser Induced Exciplex Fluorescence (LIEF) technique. The droplet size distribution, ambient gas velocity field, vapor phase distribution and fuel film mass generated by spray-wall impingement, measurements which are generally difficult to obtain by experimental methods, are also calculated and discussed. Quantitative discussions on the effect of the ambient temperature on the spray development process are conducted. It is shown that the applied models are applicable even in the high ambient temperature condition.     

基于C#的船舶液压舵机系统动态仿真

根据船舶液压舵机系统的工作原理和实船舵机系统的相关参数,建立船舶液压舵机系统的数学模型,在此基础上开发基于C#及GDI+技术的船舶液压舵机系统仿真软件,完成船舶液压舵机系统工作过程的动态仿真,实现实时数据显示,操作响应等功能。     

RD1型电加热道岔融雪系统数据工具软件的设计与实现

介绍RD1型电加热道岔融雪系统数据工具软件的设计与实现,结合软件开发过程,对在软件开发中涉及到的GDI+、泛型、动态对象、JSON序列化、正则表达式等知识进行介绍,并结合软件开发需求进行代码实例应用说明.