Aerodynamic testing simulation facility for high-speed elevator
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摘要: 基于对影响高速电梯隧道效应参数的无量纲分析,设计并建成了一套简化高速电梯气动特性试验设备,可实现不同的阻塞比、开口比、端头留空比和箱体外形等多种状态下的实验模拟,使用数字式粒子图像测速系统(DPIV)开展了四种端部形状(平头、圆锥、圆头和抛物线)的箱体绕流的瞬时速度场测量.结果分析表明:绕箱体存在复杂非定常的涡流动,头部基本不分离,看不出不同形状的影响;尾部分离情况不同,平头与其它形状有明显区别.Abstract: Based on the non-dimensional analysis of parameters influencing the aerodynamic tunnel effect in high-speed elevators, a simplified testing facility was designed and set up. Significant physical parameters, including blockage ratios, open ratios, reserved ratios and distinct shapes of car head (cylindrical, parabolic, conical and spherical shape) were available in this facility. The instantaneous velocity distribution fields around different symmetrical heads and tails were measured by using DPIV (digital particle image velocimetry) systems. Results show it is distinct between cylindrical shape and other three shapes for the wake separation pattern but no separation is obvious around heads for all shapes.
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Key words:
- tunnel effect /
- aerodynamic characteristics /
- testing facility
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[1] Schetz A. Aerodynamics of high-speed trains[J]. Ann Rev Fluid Mech,2001,33:371~414 [2]Baron Arturo, Mossi Michele, Sibilla Stefano.The alleviation of the aerodynamic drag and wave effects of high-speed trains in very long tunnels[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2001,89(5):365~401 [3] 朱 卫.高速列车气动外形风洞试验研究[J].流体力学实验与测量,1997,11(2):105~107 Zhu Wei. Wind tunnel test study of the aerodynamic shape of high-speed trains . Experiments and Measurements in Fluid Mechanics,1997,11(2):105~107(in Chinese) -
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