Three-dimensional retarding walls and flow in their vicinity

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2004

Author

Toker, Kemal Atılgan

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The performance prediction of solid propellant rocket motor depends on the calculation of internal aerodynamics of the motor through its operational life. In order to obtain the control volume, in which the solutions will be carried out, a process called أgrain burnback calculationؤ is required. During the operation of the motor, as the interface between the solid and gas phases moves towards the solid propellant in a direction normal to the surface, the combustion products are generated and added into the control volume. This phenomenon requires handling of moving boundaries as the solution proceeds. In this thesis, Fast Marching Method is implemented to the problem of grain burnback. This method uses the upwinding nature of the propellant interface motion and solves the Eikonal type equations on a fixed three-dimensional tetrahedron mesh. The control volume is coupled to a one-dimensional and a three-dimensional Euler aerodynamic solver in order to obtain the performance of the engine. The speed by which the interface moves depends on the static pressure on the surface of the propellant and comes from the solver. Therefore an iterative method has been proposed between the interface capturing algorithms and the flow solver. Both of the calculation results, which are obtained from one-dimensional and three-dimensional solvers are compared with actual rocket firing data and validated.

Subject Keywords

Solid propellant rockets., Solid propellant.

URI

http://etd.lib.metu.edu.tr/upload/12605668/index.pdf
https://hdl.handle.net/11511/15045

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

K. A. Toker, “Three-dimensional retarding walls and flow in their vicinity,” Ph.D. - Doctoral Program, Middle East Technical University, 2004.