Question

跪求中文翻译，小弟急需

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。利用有限体积法对流场的分布和计算方法进行了详细分析。

Answer 1

The ultrasonic wave gas flow amount examination technology was a recent years current capacity examination domain luminescent spot, was playing the more and more vital role in the flow measurement aspect, its technical renewal was very quick. And to the measurement result accuracy, stable and the flow field compatibility research request is more and more high. The article embarks from the ultrasonic wave flowmeter principle to possibly causes the sound track length and the propagation time these two a concept of quantity surveys uncertainty the production reason carries on the analysis, the detailed elaboration measurement result uncertainty has had the reason; Because the ultrasonic wave flowmeter is extremely sensitive to the flow field condition, therefore possibly meets to it the ideal and the model non- ideal flow field mobile situation conducts the research, and carries on the introduction to the pipeline flow field computational method, the concrete introduction limited volumetric method (FMV), the limited volumetric method in the FLUENT separate method, finally has chosen in FLUENT the turbulent motion model to carry on processing to the typical flow field rapids. The survey 不确定度 may reflect each kind of origin different error to the measurement result influence, may reflect to their computation these errors obey the distributed rule, enhances the measurement result the accuracy; But the flow field computation analysis is the flowmeter flow field compatibility research rationale, has the important project significance, these two aspects research convection gauge development has the strategic influence. Used the limited volumetric method has carried on the multianalysis to the flow field distribution and the computational method.