Aerodynamic testing simulation facility for high-speed elevator

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.