Research on aerodynamic drag reduction of vehicle with flow control based on self-excited vibration actuator
In order to reduce the aerodynamic drag of traveling vehicles,a self-excited vibration actua-tor based on the fluid-structure coupling of internal structure was used to generate high-speed,high-frequency pulsed microjet for active flow control.The working process of the actuator was simulated by ANSYS bi-directional fluid-structure coupling method,the velocity and frequency of the pulsed jet produced by the actuator were analyzed,and then the influence of different working parameters and structural parameters on its excitation characteristics was studied.The actuator was arranged along the separation edge of the tail of the Ahmed body model,its influence on the flow topology of the wake area of the body was studied,and its drag reduction effect was analyzed through the air drag co-efficient.The results show that the pulsed microjet generated by self-excited vibration actuator is ef-fective in drag reduction,with a drag reduction effect up to 7.12％.The study provides a new idea for drag reduction with active flow control.
self-excited vibration actuatorpulsed microjetactive flow controlbi-directional fluid-structure couplingAhmed body
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维普
