中文摘要：

为了评估2种不同型面工业喷管出口位置气流参数的差异性，采用计算流体力学数值分析方法，对2种不同型面的工业喷管进行多种工况条件下的数值模拟。计算结果表明：2种喷管在相同的入口工况参数条件下，曲线型喷管与直线型喷管相比，出口位置各项气流参数的均匀性均具有明显的优势。2种喷管在多种工况条件下，曲线型喷管出口位置气流的平均静温、平均静压、平均总压与直线型喷管出口位置对应的气流参数相比，最高分别增加了0．8％、2．25％、3．43％。采用根据超音速特征线理论设计出的曲线型喷管作为工业常用喷管可减小喷管内部机械能损失、优化喷管出口流场品质，提高工业生产工艺技术的效率和精确性。

英文摘要：

In order to evaluate the difference of two different types of industrial nozzles＇ outlet flow parameters, using Computational Fluid Dynamics numerical analysis method, two different types of industrial nozzles under various working conditions were simulated numerically. The calculation results show that compared with linear nozzle, the curve nozzle has obvious advantages of uniformity of outlet flow parameters under the same initial condition. Two kinds of nozzles under the different working conditions, average static temperature, average static pressure and average total pressure of outlet flow of curve nozzle compared to linear nozzle, the highest increases are 0.8% , 2.25%, 3.43% respectively. Therefore, using curve nozzle which is designed according to the supersonic characteristic line theory as the common industrial nozzle can reduce the internal mechanical energy loss, optimize outlet flow field quality, wtich can improve the efficiency and accuracy of industrial process technology.