Abstract
The work is devoted to the analysis of the methane-air conical flame behaviour under conditions of an alternating gravitational field. Numerical simulation based on the software package FlowVision, has shown the possibility of modeling the flame front instabilities during the transition from the normal gravitational conditions to zero gravity. The appearance of the flame front oscillations is demonstrated under the such conditions. Further studies will provide a complete picture of the behavior of the flame in an alternating gravitational field.
Highlights
Combustion processes experimental studies, both under the weightlessness conditions and under the increased gravity (overload) in centrifuges, Drop towers, ISS and parabolic flights, were carried out by various scientific centers, such as NASA, ESA, Roskosmos [1].In particular, the author of the current work carried out experiments on the vacuumdynamic Bremen Drop tower facility [2 - 4].in the literature there is no data on the flame characteristics under transitional conditions (transition from the normal gravity to the microgravity and reverse), which is undoubtedly an essential issue
Combustion processes experimental studies, both under the weightlessness conditions and under the increased gravity in centrifuges, Drop towers, ISS and parabolic flights, were carried out by various scientific centers, such as NASA, ESA, Roskosmos [1].In particular, the author of the current work carried out experiments on the vacuumdynamic Bremen Drop tower facility [2 - 4].in the literature there is no data on the flame characteristics under transitional conditions, which is undoubtedly an essential issue
A detailed illustration of the nozzle geometry and the computational domain design is shown in the Figure
Summary
Combustion processes experimental studies, both under the weightlessness conditions and under the increased gravity (overload) in centrifuges, Drop towers, ISS and parabolic flights, were carried out by various scientific centers, such as NASA, ESA, Roskosmos [1].In particular, the author of the current work carried out experiments on the vacuumdynamic Bremen Drop tower facility [2 - 4].in the literature there is no data on the flame characteristics under transitional conditions (transition from the normal gravity to the microgravity and reverse), which is undoubtedly an essential issue. Numerical simulation of processes by the finite element method was carried out by using a FlowVision software package [5].
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