On the influence of the effective heat of ablation on modeling the interaction of meteoroids with the atmosphere


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The problem of modeling the entry into the atmosphere of a meteor body and the interaction between them is considered. Modeling the motion, ablation and energy deposition of a meteoroid or its fragments moving as a single body is carried out within the framework of the meteor physics equations. The main parameter of the equations is the ablation parameter equal to the ratio of the heat transfer coefficient to the effective heat of mass loss. Due to the lack of data from theoretical and experimental studies on determination of the effective heat of ablation at high meteor velocities, its constant value is usually used in the literature. In this paper, it is proposed to use the effective heat of ablation variable along the trajectory, interpolating its value between the heat of evaporation and the heat of melting (or spallation) depending on the flight velocity. By numerically solving the meteor physics equations, we study the influence of the way of setting the effective heat of ablation and its uncertainty on the simulated characteristics: meteoroid velocity, change in its mass and energy deposition along the trajectory and on the trajectory itself; the inaccuracy in determining these characteristics is estimated.

meteoroid, ablation parameter, effective heat of ablation

DOI: http://doi.org/10.33257/PhChGD.23.2.995


Volume 23, issue 2, 2022 year


О влиянии эффективной теплоты абляции на моделирование взаимодействия метеороидов с атмосферой

Рассматривается проблема моделирования входа в атмосферу метеороида и его взаимодействия с ней. Моделирование движения, абляции и энерговыделения метеороида или его фрагментов, движущихся как единое тело, проводится в рамках уравнений метеорной физики. Основным параметром этих уравнений является параметр абляции, равный отношению коэффициента теплопередачи к эффективной теплоте уноса массы. недостатка данных теоретических и экспериментальных исследований по определению эффективной теплоты абляции при высоких метеорных скоростях, в литературе обычно используется постоянное ее значение. В данной работе предлагается использовать переменную вдоль траектории эффективную теплоту абляции, интерполируя ее значение между теплотой испарения и теплотой плавления (или шелушения) в зависимости от скорости полета. Путем численного решения уравнений метеорной физики исследуется влияние способа задания эффективной теплоты абляции и ее неопределенности на моделируемые характеристики задачи: скорость метеороида, изменение его массы, выделение энергии вдоль траектории и на саму траекторию; оценивается погрешность в определении этих характеристик.

метеороид, параметр абляция, эффективная теплота абляции.

DOI: http://doi.org/10.33257/PhChGD.23.2.995


Volume 23, issue 2, 2022 year



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