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NUMERICAL SIMULATION OF THE NONSTATIONARY SPATIAL GASDYNAMICS PROCESSES ACCOMPANYING THE PELLETIZED SOLID PROPELLANT COMBUSTION IN A GAS GENERATORстатья
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
- Авторы: Lipanov Alexey Matveevich, Lukin Alexander, Aliyev Ali V.
- Журнал: International Journal of Energetic Materials and Chemical Propulsion
- Год издания: 1997
- Издательство: Begell House
- Местоположение издательства: United States
- Первая страница: 1164
- Последняя страница: 1178
- DOI: 10.1615/intjenergeticmaterialschemprop.v4.i1-6.1070
- Аннотация: In the present paper, the laws of sequential distribution of the parameters of nonstationary two-dimensional flows of the mixture of pelletized solid propellant (PSP) combustion products (CP) along the gas generator (GG) cavity is investigated numerically. For imitation of the exploitation conditions the GG is placed in a cylindrical imitation chamber. Two-dimensional gas-dynamic equations of motion of the CP mixture between the granulated elements (GE), are written in the axisymmetrical statement for the multicomponents biphase mixture of ideal gases. A peculiarity of the model is that the physical processes accompanying the CP filtration through granular propellant are taken into account. Calculation of the solid phase temperature state and its non-stationary burning-out is carried out on the method, made up in accordance with the model of Prof. R. Ye. Sorkin of Russia. The heat problem is solved in each of gas-dynamics knots for a separately taken propellant pellet. The equations, describing the gas-dynamic processes, are solved numerically by the Large Particles Method, developed by Prof. Yu. M. Davydov of Russia, with using of a number of modifications. For the complex check-up of the developed mathematical model of physico-chemical processes, the numerical calculation results have been compared with the fire stand tests. The analysis of results of numerical investigations of laws of the physico-chemical processes evolution in the GG reveals that the flows patterns in the GG cavities are characterized by substantial inhomogeneity, increasing as the process develops and expressed temperature sensitivity. After the pelletized propellant complete ignition, the flow non-one-dimensionity degenerates gradually and parameters in the GG volume can be averaged. Using of two-dimensional gas-dynamic model opens a possibility for obtaining the information on processes proceeding in the GG at a new qualitative level, gives a more comprehensive idea about the physico-chemical processes essence and permits to abandon the use of a number of empirical relations.
- Добавил в систему: Лукин Александр Николаевич