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文章介绍了一种整体长度为0.64 m,重约为4 kg,轻巧、便携的烟风洞装置的特点。该装置有着良好的烟气发生装置和烟气流动质量,方便的燃油补充机构和试件磁力固定结构,是流体力学学科中一种较完美的教学工具。轻巧的结构使得这种烟风洞装置可以很方便地携入教室用于教学演示。各种研究对象在风洞中的绕流情况可以很好地用高质量的数字照片显示出来,这些照片如圆柱绕流,平面叶栅的流线分布,都能较好地反映了流体力学流动基本规律;同时,通过对一个模型汽车所进行的流体力学数值计算(FLUENT)与实验对比,其结果显示出它们的流动状态吻合较好,说明这种便携式烟风洞的良好性能。
This article describes the characteristics of a lightweight, portable smoke tunnel device with an overall length of 0.64 m and a weight of about 4 kg. The device has a good flue gas generating device and flue gas flow quality, convenient fuel replenishment mechanism and specimen magnetic fixing structure, which is a perfect teaching tool in fluid mechanics. Lightweight construction allows this smoke tunnel device can be easily carried into the classroom for teaching demonstrations. The flow around various wind tunnels can be well represented by high-quality digital photos of various subjects, such as the flow around the cylinder and the flow distribution of the plane cascade, which can better reflect the hydrodynamic flow At the same time, the FLUENT of a model car is compared with the experimental results. The results show that their flow state is in good agreement, indicating the good performance of this portable smoke tunnel.