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摘 要： 流动均匀性在很多研究领域中都是重要的衡量指标，为便于直接采用数值模拟结果进行均匀性分析，取消数据采集点的设置，简化计算过程，本文通过对假定截面上三种速度变化时24种速度分布均匀性的分析，提出了基于面积加权平均速度和质量加权平均速度的均匀性计算关联式 ，并用？和文献中的？对该截面上24种速度分布的均匀性进行计算，结果显示：当均匀性大于60%时，？和？的评价结果基本吻合,当均匀性小于60%时， 评价结果低于？评价结果，但由于均匀性较差的流动需要进一步改善其结构，均匀度只是提供了需要改善的依据，所以的结果完全有参考价值。最后以某地铁车辆空调风道送风为例对理论分析结果做了进一步验证，确认了？反映流动均匀性的合理性。 关键词 ：流动均匀性；面积加权平均速度；质量加权平均速度；数值模拟； Flow Uniformity Index Based On Area-Weighted And Mass-Weighted Average Velocity Abstract: Flow uniformity is an important index in many research fields. In order to use directly numerical simulation to analyze flow uniformity quickly, abolish the data collection points set up and simplify computation process, a new correlation based on area-weighted and mass-weighted average velocity was proposed to evaluate flow uniformity in this study through the analysis of the uniformity of 24 velocity distribution under the circumstance of three kinds of speed change at assumed cross section. The and the in the literature were adopted to calculate the uniformity of 24 velocity distribution at assumed cross section. The results showed that the evaluation obtained by the was basically consistent with that obtained by the when the uniformity of velocity distribution was over 60%. The evaluation given by the was worse than that given by the when the uniformity of velocity distribution was less than 60%. But, as the flow of the poor uniformity need to further improve its structure, the uniformity was to provide a basis for improvement. Therefore, the results provided by the were fully reference. Finally, take supplying air of a metro vehicle air-conditioning duct as an example, the above theoretical analysis results were further verified, it confirmed that the could reflect the reasonable flow uniformity. Keywords: flow uniformity; area-weighted average velocity; mass-weighted average velocity; numerical simulation