Measurements of concentration distribution of hydrogen jet using deflection of center of the laser spot |
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| Affiliation: | 1. Faculty of Materials and Manufacturering, Beijing University of Technology, China;2. Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, China;3. Shanghai Institute of Mechanical and Electrical Engineering, China;4. China Automotive Technology and Research Center Co., Ltd, China;5. College of Engineering Science and Technology, Shanghai Ocean University, China |
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| Abstract: | The main purpose of this work is to propose a new method to evaluate the concentration distribution of the hydrogen jet by using a He–Ne laser through the jet. This research attempts to apply the expression of concentration Gaussian distribution, the refraction formula of inhomogeneous refractive index medium, and the concentration inversion function to disclose the displacement of the center of the laser spot at different heights in the gas jet. The spot images of the laser beam passing through the gas jet at three vertical heights z = 10d, 20d, 30d, and different radial positions are obtained. The radial spatial asymmetry of the gas jet is also found in the experiment. Finally, the calculated concentration distribution curve and the fluent simulation curve, it is found that the two results are very similar. Our findings show that the error between the concentration distribution of this method and the simulated concentration distribution reaches 2.43%. |
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| Keywords: | Hydrogen jet Visualization Optical measurement Deflection Asymmetry |
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