Fire nowadays is one of the most dangerous factors during the flight of a manned spacecraft. In this
connection there is a lot of research on combustion considering the influence of space flight factors.
Specific attention is paid to research of combustion processes under microgravity. In recent years this
research avenue expands more and more in countries developing manned space flights. The research on
fire safety provision in inhabited pressurized compartments of manned spacecraft is particularly important
both in creating fire-safety structures and in developing extinguishment systems. The second direction is
research on the physical phenomena specific to combustion in microgravity. It is established, that the
rates of diffusion of critical species basically define the rate of combustion of solid materials in
microgravity conditions. There is no natural-convective movement of gases in microgravity conditions,
which makes the flame spread hard to predict. Therefore, an important result of the research has been a
calculation of such parameters, which are then used to establish the accuracy of numerical models of
combustion, designed under controlled conditions with the interaction of forced gas motion in the
oxidizing environment with the combustion zone. The present article contains the analysis of
experimental studies on combustion in microgravity and the corresponding technical solutions applied in
the spacecraft design. Research results on combustion in microgravity obtained by Russian scientists
made it possible to develop new technologies to provide fire safety in inhabited pressurized compartments
of manned spacecraft.
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