为满足工程需要,设计一种自混合的混凝土喷嘴。通过该喷嘴可以将混有速凝剂的压缩空气和通过管道输运过来的混凝土拌合物混合。基于L9(34)正交试验,利用Fluent对9组不同结构参数的喷嘴进行数值模拟,采用极差分析法处理喷嘴出口混合均匀度,得到了新型喷嘴最佳的结构参数组合。结果表明:与传统喷嘴相比,优化后的新型喷嘴出口均匀度提高了9.69%,达到了改善混合效果的目标,验证了新型喷嘴结构设计的合理性,为新型喷嘴的实际应用提供了一定的理论支持。
Abstract
A self-mixing concrete nozzleis designed to meet engineering needs. This nozzle can mix compressed air mixed with accelerator and concrete transported through pipelines. Based on the L9(34) orthogonal experiment, the Fluent simulation software is used to calculate the 9 groups of nozzles with different structural parameters. Then the range analysis method is used to process the nozzle outlet mixing uniformity, and obtain the best combination of structural parameters for the new nozzle. The results show that compared with the traditional nozzle, the optimized nozzle outlet uniformity increased by 9.69%. The goal of improving the mixing effect is achieved, and the rationality of the new nozzle structure design is verified. It provides certain theoretical support for the practical application of the new nozzle.
关键词
混凝土喷嘴 ;
气力运输 ;
正交试验 ;
数值模拟 ;
混合均匀度
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Key words
concrete nozzle ;
pneumatic transport ;
orthogonal test ;
numerical simulation ;
mixing uniformity
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