Fang Gu
Nanjing University of Information Science and Technology
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Publication
Featured researches published by Fang Gu.
Optics Letters | 2016
Yun-yun Chen; Yang Song; Fang Gu; Shao-feng Shao; Ying-ying Zhang
In this Letter, a direct method is proposed to measure the electron number density distribution for high-temperature complex flow fields. The experimental system of two-wavelength moiré tomography is established, while four key issues are solved and well clarified. The argon arc plasma is adopted as an example for experiment, while 532 and 808 nm are chosen as the two probe wavelengths. The results indicate that the electron number densitys distribution of the measured argon arc plasma can be directly obtained by two-wavelength moiré tomography, which can avoid the imprecision of the indirect methods. This Letter can provide some reference for various high-temperature and high-density gradient flow field optical measurement and diagnosis.
Applied Optics | 2012
Yun-yun Chen; Cheng-yi Zhang; Fang Gu; Qing-hua Wang; Zhenhua Li
The effect of arc plasma ionization on its temperature diagnosis by the measurement of the refractive index is discussed. The refractive index of arc plasma in two conditions is compared: 1) only the first ionization is considered and 2) both the first and second ionizations are considered. In order to facilitate plasma temperature reconstruction, two corresponding refractive index models are deduced. For the sake of making this study universal, both the monatomic and dual-atomic molecule arc plasmas are chosen as typical examples for theoretical deduction and analysis. A condition, which can be adopted to estimate whether the second ionization should be considered in temperature reconstruction, is proposed. Finally, an argon arc plasma is chosen as an example for experiment, and the experimental results match well with the theoretical analysis. This study is crucial to arc plasmas optical diagnosis, which is based on the measurement of the refractive index.
Optics Communications | 2012
Yun-yun Chen; Gaige Zheng; Fang Gu; Zhenhua Li
Optics Communications | 2014
Yun-yun Chen; Gaige Zheng; Yang Yu; Fang Gu
Optik | 2014
Yun-yun Chen; Fang Gu; Gaige Zheng; Yuzhu Liu
Optik | 2017
Linhua Xu; Gaige Zheng; Min Lai; Fenglin Xian; Shixin Pei; Junfeng Wang; Liming Qian; Fang Gu
Optik | 2016
Yun-yun Chen; J. Yang; Fang Gu
Optik | 2014
Yun-yun Chen; Gaige Zheng; Fang Gu; Yang Yu
Optics Communications | 2013
Yun-yun Chen; Gaige Zheng; Fang Gu; Qing-hua Wang; Zhenhua Li
Optik | 2016
Yun-yun Chen; Fang Gu; Cui-hong Yang; Ying-ying Zhang
Collaboration
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Nanjing University of Information Science and Technology
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