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Keywords = large-aperture channel sealing

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14 pages, 4566 KiB  
Article
Aerodynamic Window Sealing of a Large-Aperture Channel for High-Power Laser Transmission
by Xunqing Huang, Yunhan Wu, Yingzhong Shi and Shuai Shao
Appl. Sci. 2022, 12(14), 7301; https://doi.org/10.3390/app12147301 - 20 Jul 2022
Cited by 1 | Viewed by 1611
Abstract
In this study, the sealing of a large-aperture channel for high-power laser transmission is achieved using an aerodynamic window. Further, a numerical model of the gas and dust particle motion in the channel is established under three different blowing schemes, and the sealing [...] Read more.
In this study, the sealing of a large-aperture channel for high-power laser transmission is achieved using an aerodynamic window. Further, a numerical model of the gas and dust particle motion in the channel is established under three different blowing schemes, and the sealing performance of the large-aperture channel is analyzed and compared under different blowing schemes. The results indicate that the larger the proportion of purge gas volume flows in the axial direction, the better the sealing effect of the channel. More importantly, the axial blowing scheme can ensure that the large-aperture channel maintains the relative positive pressure to the external environment, effectively blocking the ambient gas and dust particles blowing in. The axial blowing scheme can achieve the sealing requirements of the large-aperture channel in an environment where the ambient wind speed is less than 20 m/s, and the dust particle mass concentration is less than 8×103 kg/m3. In this case, the minimum non-zero z-directional wind speed is stable and positive at a position 100 mm away from the port in the channel, and the particle mass concentration is zero. Full article
(This article belongs to the Section Fluid Science and Technology)
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