Wei Zhai
Northwestern Polytechnical University
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Publication
Featured researches published by Wei Zhai.
Review of Scientific Instruments | 2014
Z. Y. Hong; P. Lü; D. L. Geng; Wei Zhai; N. Yan; Bingqing Wei
Here we demonstrate that spherical rotors with 40 mm diameter and 0-1 kg mass can be suspended more than tens of micrometers away from an ultrasonically vibrating concave surface by near-field acoustic radiation force. Their rotating speeds exceed 3000 rpm. An acoustic model has been developed to evaluate the near-field acoustic radiation force and the resonant frequencies of levitation system. This technique has potential application in developing acoustic gyroscope.
Review of Scientific Instruments | 2016
P. Lü; Z. Y. Hong; Jianbo Yin; N. Yan; Wei Zhai; H. P. Wang
Here we observe the attenuation motion of spherical rotors levitated by near-field acoustic radiation force and analyze the factors that affect the duration time of free rotation. It is found that the rotating speed of freely rotating rotor decreases exponentially with respect to time. The time constant of exponential attenuation motion depends mainly on the levitation height, the mass of rotor, and the depth of concave ultrasound emitter. Large levitation height, large mass of rotor, and small depth of concave emitter are beneficial to increase the time constant and hence extend the duration time of free rotation.
Acta Materialia | 2012
Wei Zhai; W.L. Wang; D. L. Geng; B. Wei
Materials Letters | 2013
Wei Zhai; Bingbo Wei
Chinese Science Bulletin | 2011
Wei Zhai; Z. Y. Hong; W. J. Xie; BingBo Wei
Materials Letters | 2015
Wei Zhai; BingBo Wei
Solid State Communications | 2014
Junbiao Wang; Wei Zhai; Bingcheng Luo; Kexin Jin; C.L. Chen
Science China-physics Mechanics & Astronomy | 2013
Wei Zhai; Z. Y. Hong; CeXiang Mei; W.L. Wang; BingBo Wei
Journal of Alloys and Compounds | 2012
Wei Zhai; D. L. Geng; W.L. Wang; B. Wei
Chinese Science Bulletin | 2013
Wei Zhai; BingBo Wei