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- Title
Gas Dynamics of a Recessed Nozzle in Its Displacement in the Radial Direction.
- Authors
Volkov, K.; Denisikhin, S.; Emel'yanov, V.
- Abstract
Numerical simulation of gasdynamic processes accompanying the operation of the recessed nozzle of a solid-propellant rocket motor in its linear displacement is carried out. Reynolds-averaged Navier-Stokes equations closed using the equations of a k-ε turbulence model are used for calculations. The calculations are done for different rates of flow of the gas in the main channel and in the over-nozzle gap, and also for different displacements of the nozzle from an axisymmetric position. The asymmetry of geometry gives rise to a complicated spatial flow pattern characterized by the presence of singular points of spreading and by substantially inhomogeneous velocity and pressure distributions. The vortex flow pattern resulting from the linear displacement of the nozzle from an axisymmetric position is compared with the data of experimental visualization. The change in the vortex pattern of the flow and in the position of the singular points as a function of the flow coefficient and the displacement of the nozzle from the symmetry axis is discussed.
- Subjects
GAS dynamics; COMPUTER simulation; SOLID propellant rockets; REYNOLDS number; NAVIER-Stokes equations; MATHEMATICAL models of turbulence; GAS flow
- Publication
Journal of Engineering Physics & Thermophysics, 2017, Vol 90, Issue 4, p932
- ISSN
1062-0125
- Publication type
Article
- DOI
10.1007/s10891-017-1640-8