title: Ð¤Ð¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ, ÑÐ¾ÑÑ Ð¸ Ð¿Ð¾ÑÐµÑÑ ÑÑÑÐ¾Ð¹ÑÐ¸Ð²Ð¾ÑÑÐ¸ Ð´Ð¸ÑÑÑÐ·Ð¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ Ð¿Ð»Ð°Ð¼ÐµÐ½Ð¸ Ð² Ð½ÐµÐ²ÐµÑÐ¾Ð¼Ð¾ÑÑÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Formation, growth, and destabilization of the diffusion flame in microgravity
Creators: name: ÐÐ°Ð¹ÑÐµÐ², ÐÐ¸ÑÐ°Ð¸Ð»
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: Ð´Ð¸ÑÑÑÐ·Ð¸Ð¾Ð½Ð½Ð¾Ðµ Ð³Ð¾ÑÐµÐ½Ð¸Ðµ
Ð»Ð°Ð¼Ð¸Ð½Ð°ÑÐ½Ð¾Ðµ Ð¿Ð»Ð°Ð¼Ñ
Ð½ÐµÐ²ÐµÑÐ¾Ð¼Ð¾ÑÑÑ
ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ðµ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ðµ
Ð½ÐµÑÑÑÐ¾Ð¹ÑÐ¸Ð²Ð¾ÑÑÑ
Ð¿Ð¾Ð³Ð°ÑÐ°Ð½Ð¸Ðµ
diffusion combustion
laminar flame
microgravity
thermal radiation
instability
extinction

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÐ¸ÑÐ»ÐµÐ½Ð½Ð¾Ð¼Ñ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð½ÐµÑÑÐ°ÑÐ¸Ð¾Ð½Ð°ÑÐ½Ð¾Ð³Ð¾ Ð»Ð°Ð¼Ð¸Ð½Ð°ÑÐ½Ð¾Ð³Ð¾ Ð´Ð¸ÑÑÑÐ·Ð¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ Ð¿Ð»Ð°Ð¼ÐµÐ½Ð¸ Ð¿ÑÐ¸ Ð³Ð¾ÑÐµÐ½Ð¸Ð¸ ÑÑÐ¸Ð»ÐµÐ½Ð° Ð½Ð°Ð´ Ð¿Ð»Ð¾ÑÐºÐ¾Ð¹ Ð¿Ð¾ÑÐ¸ÑÑÐ¾Ð¹ Ð³Ð¾ÑÐµÐ»ÐºÐ¾Ð¹ Ð² ÑÑÐ»Ð¾Ð²Ð¸ÑÑ Ð½ÐµÐ²ÐµÑÐ¾Ð¼Ð¾ÑÑÐ¸. Ð Ð°ÑÑÑÑÑ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ñ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ ANSYS Fluent Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ ÑÑÑÑÐ¼ÐµÑÐ½Ð¾Ð¹ Ð½ÐµÑÑÐ°ÑÐ¸Ð¾Ð½Ð°ÑÐ½Ð¾Ð¹ Ð¼Ð¾Ð´ÐµÐ»Ð¸, ÑÑÐ¸ÑÑÐ²Ð°ÑÑÐµÐ¹ Ð¼Ð½Ð¾Ð³Ð¾ÑÑÐ°Ð´Ð¸Ð¹Ð½ÑÐµ Ð¸ Ð¼Ð½Ð¾Ð³Ð¾ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½ÑÐ½ÑÐµ ÑÐ¸Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¼ÐµÑÐ°Ð½Ð¸Ð·Ð¼Ñ Ð¾ÐºÐ¸ÑÐ»ÐµÐ½Ð¸Ñ Ð³Ð¾ÑÑÑÐ¸Ñ, Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ Ð¾ÐºÐ¸ÑÐ»ÐµÐ½Ð¸Ðµ ÑÐ°Ð¶Ð¸, ÑÐ¼Ð¸ÑÑÐ¸Ñ, Ð¿ÐµÑÐµÐ½Ð¾Ñ Ð¸ Ð¿Ð¾Ð³Ð»Ð¾ÑÐµÐ½Ð¸Ðµ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð³Ð¾ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ Ð¿ÑÐ¾Ð´ÑÐºÑÐ¾Ð² ÑÐ³Ð¾ÑÐ°Ð½Ð¸Ñ. Ð Ð°ÑÑÑÑÑ Ð²Ð¾ÑÐ¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑ ÑÑÐ»Ð¾Ð²Ð¸Ñ ÐºÐ¾ÑÐ¼Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ° Â«Ð¤Ð»Ð°Ð¼ÐµÐ½ÐºÐ¾Â», Ð²ÑÐ¿Ð¾Ð»Ð½ÑÑÑÐµÐ³Ð¾ÑÑ Ð² Ð½Ð°ÑÑÐ¾ÑÑÐµÐµ Ð²ÑÐµÐ¼Ñ Ð½Ð° ÐÐÐ¡. ÐÑÐ¸Ð²Ð¾Ð´Ð¸ÑÑÑ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² ÑÐ°ÑÑÐµÑÐ° Ð¸ Ð¸Ñ ÑÐ¾Ð¿Ð¾ÑÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ Ñ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐ¼Ð¸ Ð´Ð°Ð½Ð½ÑÐ¼Ð¸ ÐÐ­ Â«Ð¤Ð»Ð°Ð¼ÐµÐ½ÐºÐ¾Â».
ÐÐ°Ð´Ð°ÑÐ¸, ÑÐµÑÑÐ½Ð½ÑÐµ Ð² Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ:
1. ÐÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¾Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ (Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ ÑÐ°Ð³Ð° Ð¿Ð¾ Ð²ÑÐµÐ¼ÐµÐ½Ð¸ Ð¸ ÑÐ³Ð»Ð¾Ð²Ð¾Ð¹ Ð´Ð¸ÑÐºÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ð¸ Ð½Ð° ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ°ÑÑÐµÑÐ¾Ð²).
2. Ð¡ÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ ÑÐ¸Ð¼Ð¸ÑÐµÑÐºÐ¸Ñ Ð¼ÐµÑÐ°Ð½Ð¸Ð·Ð¼Ð¾Ð² Ð¸ Ð²ÑÐ±Ð¾Ñ Ð¾Ð¿ÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð´Ð»Ñ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ñ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð½ÐµÑÑÐ°ÑÐ¸Ð¾Ð½Ð°ÑÐ½Ð¾Ð³Ð¾ Ð´Ð¸ÑÑÑÐ·Ð¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ Ð¿Ð»Ð°Ð¼ÐµÐ½Ð¸ Ð² Ð½ÐµÐ²ÐµÑÐ¾Ð¼Ð¾ÑÑÐ¸
3. ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ ÐºÐ¾Ð½ÑÐµÐ½ÑÑÐ°ÑÐ¸Ð¸ ÐºÐ¸ÑÐ»Ð¾ÑÐ¾Ð´Ð° Ð² Ð¾ÐºÑÑÐ¶Ð°ÑÑÐµÐ¹ ÑÑÐµÐ´Ðµ Ð½Ð° Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÑ ÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ, ÑÐ¾ÑÑÐ°, Ð¿Ð¾ÑÐµÑÐ¸ ÑÑÑÐ¾Ð¹ÑÐ¸Ð²Ð¾ÑÑÐ¸ Ð¸ Ð¿Ð¾Ð³Ð°ÑÐ°Ð½Ð¸Ñ Ð¿Ð»Ð°Ð¼ÐµÐ½Ð¸. Ð¡ÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ Ñ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ°Ð¼Ð¸ ÐÐ­ Â«Ð¤Ð»Ð°Ð¼ÐµÐ½ÐºÐ¾Â».
Ð Ð°Ð±Ð¾ÑÐ° ÑÐ¾ÑÑÐ¾Ð¸Ñ Ð¸Ð· Ð²Ð²ÐµÐ´ÐµÐ½Ð¸Ñ, ÑÑÑÑ Ð³Ð»Ð°Ð², Ð·Ð°ÐºÐ»ÑÑÐµÐ½Ð¸Ñ Ð¸ ÑÐ¿Ð¸ÑÐºÐ° Ð»Ð¸ÑÐµÑÐ°ÑÑÑÑ. ÐÐ¾ Ð²Ð²ÐµÐ´ÐµÐ½Ð¸Ð¸ Ð¾Ð±ÑÑÐ¶Ð´Ð°ÐµÑÑÑ Ð°ÐºÑÑÐ°Ð»ÑÐ½Ð¾ÑÑÑ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¸ ÑÐ¸ÑÐ»ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð³Ð¾ÑÐµÐ½Ð¸Ñ Ð² ÑÑÐ»Ð¾Ð²Ð¸ÑÑ Ð½ÐµÐ²ÐµÑÐ¾Ð¼Ð¾ÑÑÐ¸, ÑÐ¾ÑÐ¼ÑÐ»Ð¸ÑÑÑÑÑÑ ÑÐµÐ»Ð¸ Ð¸ Ð·Ð°Ð´Ð°ÑÐ¸
Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ. Ð Ð¿ÐµÑÐ²Ð¾Ð¹ Ð³Ð»Ð°Ð²Ðµ Ð¿ÑÐ¸Ð²Ð¾Ð´Ð¸ÑÑÑ Ð¾Ð±Ð·Ð¾Ñ Ð¸Ð¼ÐµÑÑÐ¸ÑÑÑ Ð¿ÑÐ±Ð»Ð¸ÐºÐ°ÑÐ¸Ð¹ Ð¿Ð¾ ÑÐµÐ¼Ðµ, Ð²Ð¾ Ð²ÑÐ¾ÑÐ¾Ð¹ Ð³Ð»Ð°Ð²Ðµ Ð´Ð°ÑÑÑÑ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð¸Ðµ Ð¼Ð°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð¼Ð¾Ð´ÐµÐ»Ð¸, Ð¸ÑÐ¿Ð¾Ð»ÑÐ·ÑÐµÐ¼Ð¾Ð¹ Ð² Ð½Ð°ÑÑÐ¾ÑÑÐµÐ¹ ÑÐ°Ð±Ð¾ÑÐµ, Ð² ÑÑÐµÑÑÐµÐ¹ Ð³Ð»Ð°Ð²Ðµ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ Ð¿Ð¾ÑÑÐ°Ð½Ð¾Ð²ÐºÐ° Ð·Ð°Ð´Ð°ÑÐ¸, Ð² ÑÐ¾Ð¼ ÑÐ¸ÑÐ»Ðµ Ð½Ð°ÑÑÑÐ¾Ð¹ÐºÐ° ÑÐµÑÐ°ÑÐµÐ»Ñ ANSYS Fluent, Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ñ Ð¸ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ°Ð±Ð¾ÑÑ.
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description: In this work, numerical simulations are presented for the essentially unsteady laminar diffusion methane-fueled flames above the flat porous burner in microgravity. The simulations were performed using ANSYS Fluent software, in which the comprehensive transient 3D model was implemented, including multistep detailed chemical mechanisms, formation and oxidation of soot, emission, transfer, and absorption of thermal radiation by the combustion products. In the simulations, the experimental conditions of the orbital experiment BRE-Flamenco (currently performed onboard ISS) are replicated. The simulation results are analyzed and compared with the experimental data generated in BRE-Flamenco orbital tests.
Specific objectives of this work include:
1. Methodology study (the effects of the time step and angular discretization on the simulation results).
2. Comparison of three chemical mechanisms and selection of the mechanism most suitable for the simulations of transient unsteady diffusion flames in microgravity.
3. Investigation of the effect of oxygen content in the ambient atmosphere on the transient dynamics of the diffusion flames in microgravity. Compari-son of the simulation results with the experimental data from the BRE-Flamenco orbital tests.
This report contains Introduction, three Chapters, Conclusions, and Refer-ences. This work has been undertaken within the research group âFire modeling and material flammabilityâ at the Department of Fluid Dynamics, Combustion, and Heat Transfer of the Institute of Applied Mathematics and Mechanics, SPbPU. Computa-tional resources were provided by the Supercomputer Center âPolytechnicâ (SPbPU).