Experimental Study on Breakdown Characteristics of SDBD-PA Based on Regression Model

doi:10.3901/JME.2021.22.369

Abstract

Abstract: The fluid-structure coupled vibration behavior of flexible structure has been widely applicated in bionic robot, underwater autonomous vehicle, precision instrument, medical Engineering, and so on. Macro fiber composite (MFC) possesses the advantages of being highly flexible and waterproof, with large actuation ability. Thus, MFC actuator is a perfect option for active deformation control of underwater flexible structure. The fluid-structure coupled dynamic model of an MFC-actuated flexible structure is established, both the internally actuation moment provided by the MFC actuators and the hydrodynamic load caused by the surrounding fluid are considered. CFD simulations on the cross section of the flexible structure bonded with MFC actuators are conducted. The flow and pressure distributions around the oscillating structure are visualized, and the hydrodynamic forces applied to the flexible structure are also extracted at different non-dimensional oscillating frequencies. Then, expressions of the real and imaginary parts of the hydrodynamic function for the MFC-actuated flexible structure are obtained, respectively. It is demonstrated that the added mass and damping effects of the surrounding fluid weaken with an increase in the non-dimensional oscillating frequency. Moreover, the real part of the hydrodynamic function for the MFC-actuated beam is larger than that of the uniform beam at the same non-dimensional frequency, so is the imaginary part of the hydrodynamic function at a high oscillating frequency. The vibration responses of the proposed underwater structure are obtained experimentally. Experimental results show that the magnitude-frequency and phase-frequency spectrums of the MFC-actuated flexible structure in experiments match well with those of the established model. Accordingly, the effectiveness of the proposed hydrodynamic function and fluid-structure coupled dynamic model for the MFC-actuated flexible structure is validated.

Key words: dielectric barrier discharge, breakdown voltage, regression model

CLC Number:

O461

ZHANG Yanghui, HU Xingjun, LIU Yichen, LI Jiuchao, YU Tianming, SANG Tao, WANG Jingyu. Experimental Study on Breakdown Characteristics of SDBD-PA Based on Regression Model[J]. Journal of Mechanical Engineering, 2021, 57(22): 369-375.

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