A Multiple-Field Finite Element Method Analysis of Observation Window for Cryogenic Wind Tunnel

Lai, Hairong; Song, Yuanjia; Ma, Yankai; Zhang, W.; Hou, Yu

doi:10.1007/s40799-022-00561-w

Cited by 1 publication

(1 citation statement)

References 16 publications

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“…The light inlet window is made of quartz glass with good UV light transmission properties and high mechanical strength, as the window is used for light transmission and gas seal. The thickness of the quartz window is estimated according to the following formula [20]. The PA cell is the core component of the detection device, and its performance directly affects the detection properties.…”

Section: Gas Vessel Design For High-pressure Gas Detectionmentioning

confidence: 99%

In Situ Photoacoustic Detection System for SO2 in High-Pressure SF6 Buffer Gas Using UV LED

Chen

et al. 2022

Sensors

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Sulfur dioxide (SO2) is a key indicator for fault diagnosis in sulfur hexafluoride (SF6) gas-insulated equipment. In this work, an in situ photoacoustic detection system using an ultraviolet (UV) LED light as the excitation source was established to detect SO2 in high-pressure SF6 buffer gas. The selection of the SO2 absorption band is discussed in detail in the UV spectral regions. Based on the result of the spectrum selection, a UV LED with a nominal wavelength of 285 nm and a bandwidth of 13 nm was selected. A photoacoustic cell, as well as a high-pressure sealed gas vessel containing it, were designed to match the output optical beam and to generate a PA signal in the high-pressure SF6 buffer gas. The performance of the proposed system was assessed in terms of linearity and detection limit. An SO2 detection limit (1σ) of 0.17 ppm was achieved. Additionally, a correction method was supplied to solve PA signal derivation induced by pressure fluctuation. The method can reduce the derivation from about 5% to 1% in the confirmation experiment.

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Section: Gas Vessel Design For High-pressure Gas Detectionmentioning

confidence: 99%

In Situ Photoacoustic Detection System for SO2 in High-Pressure SF6 Buffer Gas Using UV LED

Chen

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

A Multiple-Field Finite Element Method Analysis of Observation Window for Cryogenic Wind Tunnel

Cited by 1 publication

References 16 publications

In Situ Photoacoustic Detection System for SO2 in High-Pressure SF6 Buffer Gas Using UV LED

In Situ Photoacoustic Detection System for SO2 in High-Pressure SF6 Buffer Gas Using UV LED

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