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跪求中文翻译

超声波气体流量检测技术是近年来流量检测领域的一个亮点，在流量测量方面发挥着越来越重要的作用，其技术更新很快。并且对测量结果的准确性、稳定性和流场适应性研究的要求越来越高。文章从超声波流量计原理出发对可能导致声道长度与传播时间这两个基本量测量的不确定度的产生原因进行分析，详细的阐述了测量结果的不确定度产生原因；由于超声波流量计对流场状况非常敏感，所以对它可能遇到的理想与典型非理想流场流动情况进行研究，并对管道流场的计算方法进行介绍，具体的介绍了有限体积法（FMV），有限体积法在FLUENT中的离散方法，最后选择FLUENT中湍流运动的模型对典型流场湍流进行处理。测量的不确定度可以反映各种来源不同的误差对测量结果的影响，对他们的计算可以反映出这些误差所服从的分布规律，提高测量结果的准确性；而流场计算分析是流量计流场适应性研究的理论基础，具有重要的工程意义，这两方面的研究对流量计的发展有着战略性的影响。

Ultrasonic gas flow detection technology in recent years, the field of flow testing a bright spot, in flow measurement plays an increasingly important role in updating its technology very quickly. And the accuracy of the measurement results, stability and adaptability flow of increasingly high demand. From ultrasonic flowmeter principle may lead to the channel length and propagation time these two basic measurement uncertainty The cause analysis, detailed description of the measurement of uncertainty causes; As convection ultrasonic flowmeter market is very sensitive situation, Therefore, it may encounter the ideal and non-ideal typical flowing to conduct a study, pipe flow calculation method, the specific introduction to the finite volume method (FMV), finite volume method in the discrete FLUENT, FLUENT final choice of turbulence model sports the typical turbulent flow field for treatment. Measurement uncertainty can reflect different sources of error of the measurement results, they reflect the calculation of these errors are to obey the laws of distribution, improve the accuracy of the measurement results; and flow-field analysis is Flowmeter Flow adaptability of the theoretical foundation, the project is of great significance. these two aspects of the development of flowmeter has strategic effect.

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