Smoke emission and temperature characteristics of the long-term overloaded wire in space

Xue, Songtao; Kong, Wenjun

doi:10.1177/0734904118821665

Cited by 8 publications

(1 citation statement)

References 31 publications

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“…Thus we suggested to investigate the smoke emission in the early stage of wire insulation by overload heating and the dispersion characteristics of the emitted smoke in the limited confined space on board SJ-10 satellite with long term microgravity (Hu et al 2014;Hu et al 2019). We have published some of these experimental results (Kong et al 2016;Xue et al 2019;Kong et al 2019), two smoke emission modes, namely the end smoke jet and the bubbling smoke jet, were identified with polyethylene and polyvinyl chloride insulations.…”

Section: Introductionmentioning

confidence: 99%

Smoke Emission and Distribution Characteristics of Overloaded Wire Insulations under Microgravity

Zhuang

Kong

2022

Microgravity Sci. Technol.

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With the development of manned space technology, spacecraft safety and fire prevention have attracted more and more attention. Due to the disappearance of buoyancy in microgravity, the fire early monitoring, detection and alarm technologies designed based on ground experimental results are not suitable for spacecraft. It is necessary to develop fire early monitoring technology in microgravity. Smoke is an important early monitoring signal for fire prevention both in normal gravity and microgravity. Under microgravity, fire is mostly caused by overload or aging of wire insulations. In order to study the smoke emission characteristics of wire insulations under microgravity, we carried out the overload experiments of wire insulations on board the SJ-10 Chinese recoverable satellite. The smoke generation characteristics captured by laser extinction methods, and a large number of experimental data in the real microgravity environment were obtained for the first time. In this paper, the smoke volume fractions in the early and axisymmetric stages of smoke emission from the wire insulating layer are obtained by using the method of Abel transform and convolution, and the MATLAB algorithm program is compiled. In the later stage of smoke emission, it does not show axisymmetric distribution, but the laser extinction results can be used for obtaining the smoke emission trajectory. According to the results, two smoke emission modes in the early stage of ignition of wire insulation in microgravity are quantitatively analyzed. The effects of insulation thickness, overload current and insulation material on smoke emission are discussed.

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Section: Introductionmentioning

confidence: 99%