scholarly journals Spectrally Selective Smart Window with High Near-Infrared Light Shielding and Controllable Visible Light Transmittance

2018 ◽  
Vol 10 (46) ◽  
pp. 39819-39827 ◽  
Author(s):  
Mengchun Wu ◽  
Yusuf Shi ◽  
Renyuan Li ◽  
Peng Wang
2020 ◽  
Vol 4 ◽  
pp. 80-93
Author(s):  
Yao Yang ◽  
Gaofeng Wang ◽  
Yuanqi Fang ◽  
YIfan Xia ◽  
Liang Zhong

An experimental study on combustion instability is presented with focus on propane-air premixed swirling flames. Swirling flames under self-excited oscillation are studied by imaging of visible light and OH* chemiluminescence filter under several typical conditions. The dynamical characteristics of swirling flames were analysed by Dynamic Mode Decomposition (DMD) method. Three types of unstable modes in the combustor system were observed, which correspond to typical acoustic resonant modes (LF mode, C1/4 mode and P1/2 mode) of the combustor system. The combustion instability is in the longitudinal mode. Furthermore, the structure of downstream hot burnt gas under stable combustion and unstable combustion is studied by imaging of visible light and near-infrared light. Results show that there is a significant difference in the downstream flow under stable combustion and unstable combustion. The DMD spectrum of the flame and the downstream hot burnt gas obtained is the same, which is close to the characteristic frequency of acoustic pressure captured by the microphone signal. The visible light and near-infrared light imaging observation method adopted in this paper provides a new imaging method for the investigation of thermo-acoustic instability.


2017 ◽  
Vol 9 (46) ◽  
pp. 40810-40819 ◽  
Author(s):  
Xiao Liang ◽  
Mei Chen ◽  
Shumeng Guo ◽  
Lanying Zhang ◽  
Fasheng Li ◽  
...  

2021 ◽  
Author(s):  
Wenhua Yang ◽  
Xinyuan Jiang ◽  
Yutian Xiao ◽  
Can Fu ◽  
Jiankun Wan ◽  
...  

Wavelength sensor as a representative optoelectronic device plays an important role in many fields including visible light communication, medical diagnosis, and image recognition. Herein, a wavelength-sensitive detector with a new...


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