الفهرس 
ARABIC SUMMARY
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Abstract
In the design of a solid-propellant rocket motor, a predetermind thrust law (thrust-time relationship) is generally one of the main design considerations. Thus, the main task of the designer isd to choose the suitable grain configuration and solid-propellant type (double-base, conmposite, etc.) which satisfy the required thrust law. Therefore, the geometric analysis of the selected configuration has a crucial importance in the grain design process.
In this thesis, ballistic simulation, analysis and design of a suggested sine-star grain configuration for solid-propellant rocket motors are comprehensively carried out. The considered sine-star grain configuration consists of a sine wave imposed on a base circle. This configuration has the same advantages of the star grain configuration, but it reduces the number of independent variables that define the star configuration and, in turn, facilitates the analysis and optimization of the configuration. Simulation, formulation and modeling of the internal ballistic parameters of the considered sine-star configuration are carried out according to the burning rate law of the solid propellant. The used analyses are not restricted to sine-star grain configuration only but they can be applied to other side burning grain configurations. Ballistic analysis and optimization of the design parameters for the considered sine-star grain configuration are conducted.
A new neutrality parameter is proposed to find the most netural burning case. This parameter is more meaningful and more accurate than other parameters mentioned in literature. A complete description of the grain behavior during netural burning of sine-star grain configuration is obtained. The vdifferent characteristic zones of burning are accurately defined.