Standard test method for average velocity in a duct pitot tube method 导管中平均速度的标准试验方法
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Verification regulation of pitot tubes 皮托管检定规程
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I lost my air speed indication due to the pitot tube getting ripped off and wasn t quite sure of the rest of the damage at this point 由于飞机空速管被撞掉，我没有了飞行速度表，而且也不知道还有多少其它损坏。
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Pitot tube allows an indirect measurement of speed by determining the dynamic pressure from the difference between the total and static pressure 空速管提供了一种间接测量速度的方法，它是通过测定全压和静态压强差值的动态变化来测量速度的。
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Measurement precision contribute to improving the security class and economic of boiler running and automatic level of whole plant . the smart measurement instrument of the boiler ’ s air flow designed in the thesis and the instrument can make the degree of accuracy get to . firstly , the thesis build the “ velocity - area ” method which is on basis of “ log - tchebycheff ” on the analyzing of basic measure method of boiler ’ s air flow . secondly , model86 averaging pitot tube was selected the right model of flow transducer which can pickoff the differential pressure and static pressure . modelc264 which made in setra system corp . u . s . a was selected as ultra low differential pressure transmitter . a good flow of boiler ’ s air was calculated by offsetting pressure and temperature . finally , numeroscope was designed with z80cpu and other chips 精确的监测有助于提高锅炉燃烧的安全型、经济性，也有助于提高电厂的整体自动化水平。本文设计的智能化锅炉风量测量装置能够实现对锅炉送风的精确测量，精度可达。本文首先研究锅炉送风矩形大管道测量理论，提出在流来流量测量测点布置基于“对数-切比雪夫”法的速度-面积法。
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At first , in the process of experiments , it were measured that dry plate pressures drop and point pressures in the flow fields around the single fixed - valve and double fixed - valves under different velocities by using of pitot tube . after that point pressure was transformed to point velocity , two dimensions flow plane of flow fields around fixed - valve were plotted to observe the difference between of the fixed - valve tray with fold edges and the common rectangular fixed - valve tray on the distributions of flow fields and pressures , to provide comparisons and refer - rence for cfd simulation 在实验中，利用测速管等仪器对在不同速度下的单阀和双阀固定阀周围的流场进行了点压力测量，然后把点压力转化为点速度后绘出固定阀周围流场的二维流线图，同时测定了塔板的干板压降，来考察新型固定阀带折边后对流场分布和压降的影响，为随后的数值模拟提供对比和依据。
