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李春晓 《浙江交通职业技术学院学报》2007,8(1):61-63
城市公交视觉系统是城市的公共交通导向系统的重要组成部分,与城市居民生活休戚相关,同时也是城市形象的关注点。本文通过对城市公共交通导向系统与公交视觉系统的共性与特性分析,结合现状调查及可行性虚拟设计,对现代城市公交视觉系统设计的发展趋势提出个人看法,以引起城市的设计者与实施者的认同和重视。 相似文献
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Numerical simulations of wind turbine blade-tower interaction by using the open source OpenFOAM tools coupled with arbitrary mesh interface(AMI) method were presented.The governing equations were the unsteady Reynolds-averaged Navier-Stokes(RANS) which were solved by the pimpleDyMFoam solver,and the AMI method was employed to handle mesh movements.The National Renewable Energy Laboratory(NREL) phase VI wind turbine in upwind configuration was selected for numerical tests with different incoming wind speeds(5,10,15,and 25 m/s) at a fixed blade pitch and constant rotational speed.Detailed numerical results of vortex structure,time histories of thrust,and pressure distribution on the blade and tower were presented.The findings show that the wind turbine tower has little effect on the whole aerodynamic performance of an upwind wind turbine,while the rotating rotor will induce an obvious cyclic drop in the front pressure of the tower.Also,strong interaction of blade tip vortices with separation from the tower was observed. 相似文献
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分析了舰载武器系统试验需求和试验环境,简要介绍了VI与网络化测试技术,并在此基础上介绍了一种基于Ⅵ的舰载网络化测试系统设计。系统采用PXI、PCI总线相结合的混合总线体系结构,由主采集器、网络测试节点和应用软件组成。 相似文献
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宋岩 《南通航运职业技术学院学报》2011,(1):39-43
文章在MARPOL公约附则VI修正案的基础上,以Z6150ZLCZ-5型柴油机为例,通过对该机型柴油机NOX排放的现场测试,评价其NOX排放水平,并对影响排放测试结果的因素进行分析研究。 相似文献