A historical overview of experimental solid combustion research in microgravity

Rojas-Alva, Ulises; Jomaas, Grunde

doi:10.1016/j.actaastro.2022.01.037

Cited by 12 publications

(3 citation statements)

References 92 publications

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“…The numerical studies in microgravity combustion can further revel the mechanism of combustion [27,28]. More detailed information are reviewed by Ulises and Grunde [29]. Additionally, microgravity biotechnology, as one of the most well-known research fields, is gaining its increasing popularity [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

A review of applications of handling particular materials under microgravity

Chang

2024

ACE

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Microgravity research has been carried out by researchers around the world for many years. By using space flight experiments (the International Space Station) and ground-based experiments (the Microgravity Sounding Rocket, a landing tower, and weightless aircraft), the investigations under microgravity conditions are thought to be beneficial to human life in terms of chemical, physical, and biological aspects, and more. It has become a very important tool for scientific research and industrial applications today. This paper reviews the work in this area with special reference to the applications in chemical engineering processes such as particle conveying and flow and material science under different gravity levels, including microgravity environments. It has been demonstrated that gravity has a strong effect on particle conveying and flow. Reduced gravity can make materials more cohesive, which further influences particle conveying. Actually, the effect of gravity can be ignored when the gravity level is less than 0.0001g. In the field of material science, the microgravity environment can accelerate the formation process of materials, like crystal growth, and then lead to a better structure.

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Section: Introductionmentioning

confidence: 99%

A review of applications of handling particular materials under microgravity

Chang

2024

ACE

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“…During this phase, astronauts will reside continuously on the Space Station, utilizing the currently equipped space application system payloads to conduct nearly a thousand scientific research and application projects across multiple professional fields. Additionally, large-scale space science experiments and technological trials will be conducted, including research in space life sciences and human physiology, microgravity physics, astronomy, and earth sciences, as well as space new technologies and applications, aiming to promote the comprehensive development of China's space science, technology, and applications [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Fault Diagnosis Method for Space Fluid Loop Systems Based on Improved Evidence Theory

Liu,

Li,

Zhang

et al. 2024

Entropy

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Addressing the challenges posed by the complexity of the structure and the multitude of sensor types installed in space application fluid loop systems, this paper proposes a fault diagnosis method based on an improved D-S evidence theory. The method first employs the Gaussian affiliation function to convert the information acquired by sensors into BPA functions. Subsequently, it utilizes a pignistic probability transformation to convert the multiple subset focal elements into single subset focal elements. Finally, it comprehensively evaluates the credibility and uncertainty factors between evidences, introducing Bray–Curtis dissimilarity and belief entropy to achieve the fusion of conflicting evidence. The proposed method is initially validated on the classic Iris dataset, demonstrating its reliability. Furthermore, when applied to fault diagnosis in space application fluid circuit loop pumps, the results indicate that the method can effectively fuse multiple sensors and accurately identify faults.

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“…Various ground-based fire tests, spacecraft experiments, and numerical simulations have been made to study the fire behaviors of solid fuels in microgravity (Fujita 2015;Rojas-Alva and Jomaas 2022). For example, the microgravity flame spread dynamics and typical fuels, such as cellulose papers (Olson 1991;Olson et al 1989;Ramachandra et al 1995;Vetturini et al 2020;Wang et al 2015), PMMA (Hu et al 2014;Link et al 2018;Olson et al 2004;Urban et al 2019;Wang and Zhu 2019;Wu et al 2020a, b;Zhu et al 2019), thin wires (Fujita et al 2002;Nagachi et al 2019;Takahashi et al 2013), PDMS membranes (Rojas-Alva et al 2022) and fabrics (Takahashi et al 2020(Takahashi et al , 2019Zhao et al 2017), have been investigated and compared with normal-gravity dynamics. In particular, thermoplastic materials, such as polyethylene (PE) and polyurethane (PU), are widely used for electrical wires and insulation materials in human-crewed spacecraft.…”

Section: Introductionmentioning

confidence: 99%

Flame Spread over Polyethylene Film: Effects of Gravity and Fuel Inclination

Zhu

Huang

Wang

2022

Microgravity Sci. Technol.

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The flammable thermoplastics are widely used in our daily life and manned space travels in microgravity, posing a potential fire risk. This work studies the flame spread along with the thin polyethylene (PE) film (15-100 µm) in the microgravity drop tower and normal gravity. Microgravity flame spread faster than vertically downward flame spread in normal gravity due to the weak buoyancy flow and greater flame preheating length. For the ultra-thin film, the influence of melting on the opposed flame spread is negligible. The upward flame spread rate reaches a maximum constant (45 ± 10 mm/s for 20 μm film) when the inclination angle is larger than 30°, due to the dripping removal of molten fuel. The upward flame spread rate changes under the competition between the enhanced flame heating by buoyancy and the dripping removal of the molten fuel. The vertically upward spreading flame cannot be maintained due to the dripping removal of the molten fuel, and a critical extinction condition was determined and analyzed. This work provides valuable data on flame dynamics in plastic films and can help develop more sophisticated material flammability tests for fire safety in space travel.

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A historical overview of experimental solid combustion research in microgravity

Cited by 12 publications

References 92 publications

A review of applications of handling particular materials under microgravity

A review of applications of handling particular materials under microgravity

Fault Diagnosis Method for Space Fluid Loop Systems Based on Improved Evidence Theory

Flame Spread over Polyethylene Film: Effects of Gravity and Fuel Inclination

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