共查询到13条相似文献,搜索用时 46 毫秒
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介绍了基于AT89C52单片机的涡流管控制系统的设计,包括系统硬件和软件的设计。在系统中,对单片机编程实现了四相步进电机的转向及定位控制,再由步进电机驱动涡流管热端阀改变其开度,从而达到控制涡流管冷流率及出口温度的目的。 相似文献
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Chang- Hyun Sohn Chang-Soo Kim Ui-Hyun Jung B. H. L Lakshmana Gowda 《Journal of Mechanical Science and Technology》2006,20(3):418-425
The present investigation deals with the study of the internal flow phenomena of the counter flow type vortex tube using experimental
testing and numerical simulation. Visualization was carried out using the surface tracing method, injecting dye on the vortex
tube wall using a needle. Vortex tube is made of acrylic to visualize the surface particle tracing and the input air pressure
was varied from 0.1 MPa to 0.3 MPa. The experimentally visualized results on the tube show that there is an apparent sudden
changing of the trajectory on the vortex tube wall which was observed in every experimental test case. This may indicate the
stagnation position of the vortex flow. The visualized stagnation position moves towards the vortex generator with increase
in cold flow ratio and input pressure. Three-dimensional computational study is also conducted to obtain more detailed flow
information in the vortex tube. Calculated total pressure, static pressure and total temperature distributions in the vortex
tube were in good agreement with the experimental data. The computational particle trace on the vortex tube wall is very similar
to that observed in experiments. 相似文献
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