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Design, testing and application of an energy-efficient longitudinal ventilation system

机译:节能纵向通风系统的设计,测试和应用

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This paper reports on the development, testing and application of jetfans with convergent nozzles to direct the flow towards the tunnel centreline, thus reducing the aerodynamic friction due to the Coanda effect. Since these nozzles do not protrude within the traffic space, a larger diameter fan running at a slower speed can be selected compared to jetfans with slanted silencers, and this configuration delivers a significant improvement in energy efficiency. An example tunnel ventilation application is highlighted, which indicates a 27% reduction in absorbed power. The effects of convergent nozzles on jetfans are demonstrated through CFD calculations on a road tunnel in London and the results of bench tests on a prototype.
机译:本文报道了带有收敛喷嘴的喷气风扇的开发,测试和应用,该喷嘴将气流引向隧道中心线,从而降低了柯恩达效应所产生的空气动力摩擦。由于这些喷嘴不会在交通空间内突出,因此与带有倾斜消音器的喷气风扇相比,可以选择以较低速度运行的大直径风扇,并且这种配置可显着提高能源效率。突出显示了示例隧道通风应用程序,它表明吸收功率降低了27%。汇聚喷嘴对喷气风扇的影响通过伦敦公路隧道上的CFD计算和样机台架试验的结果得到证明。

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