Multiscale Simulation of Gas-Particle Flows in Combustion Chambers of Solid Rocket Motors

The development and application of numerical simulation to the study of intra-chamber pro-cesses occurring in solid propellant rocket motors (SRM) is discussed. A characteristic of internal flows in the channels and nozzles of SRM is the presence of condensed phase particles having a non-spherical shape. Mathematical problems in this area is the simultaneous occurrence of processes on many time and spatial scales, which describe the formation of agglomerate particles, their combustion and transport in flow of combustion products in internal channels and nozzles. One of the approaches to solving these problems is a multilevel multiscale approach that combines models describing the state of the system at the micro-, me-so- and macro-scales. An overview of models varying in complexity and level of detail is given. The construction of multiscale models is considered in relation to the simulation of two-phase flows with metal-oxide agglomerates formed in the propellant channel and representing drops of molten metal with oxide particles attached to their surface. The capabilities of the developed approach are demonstrated by the calculations of flows of combustion products containing agglomerate particles in the channels and nozzles of propulsion systems.

multiscale simulation, combustion chamber, solid rocket motor, computational gas dynamics, channel, nozzle, turbulence, particle, non-spherical shape, drag, heat transfer

Volume 25, issue 1, 2024 year

Многомасштабный подход к моделированию течений газа с частицами в камерах сгорания двигательных установок

Обсуждается развитие и применение методов численного моделирования для исследования газодинамических процессов, протекающих в ракетных двигателях твердого топлива (РДТТ). Характерной чертой внутренних течений в каналах и соплах РДТТ является наличие частиц конденсированной фазы, имеющих несферическую форму. Особенностью математических задач в данной области является одновременное протекание процессов на многих временных и пространственных масштабах, которые описывают формирование частиц-агломератов, их горение и перенос потоком продуктов сгорания во внутренних каналах и соплах. Одним из подходов к решению таких задач является многоуровневый многомасштабный подход, сочетающий модели, описывающие состояние системы на микро-, мезо- и макро-масштабах. Дается обзор различных по сложности и уровню детализации моделей. Рассматривается построение многомасштабных моделей применительно к моделированию двухфазных течений с металл-оксидными агломератами, формирующимися в канале заряда и представляющими собой капли расплавленного металла с присоединенными к их поверхности частицами окиси металла. Возможности разработанного подхода демонстрируются на примере расчетов течений продуктов сгорания, содержащих частиц-агломераты, в каналах и соплах двигательных установок.

многомасштабное моделирование, камера сгорания, двигатель, вычислительная газовая динамика, канал, сопло, турбулентность, частица, несферическая форма, сопротивление, теплообмен

Volume 25, issue 1, 2024 year

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