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ID: 139078

Internal ballistic code for solid rocket motors using minimum distance function for grain burnback / Javed , Afroz; Iyer, Arvind Sundaram; Chakraborty , Debasis

Javed , Afroz	Article
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Summary/Abstract

A computer code has been developed for internal ballistic performance evaluation of solid rocket motors, using minimum distance function (MDF) approach for prédiction of geometry évolution. This method can handle any complex geometry without the need to define different geometrical shapes and their evolution as used in several existing analytical geometry evolution-based methodologies. The code is validated with both experimental results published in literature, as well as for solid rocket motors of tactical and strategic missiles and a very good match is obtained with static test results. The output of the code gives pressure-time (p-t) curve as well as the detailed parameters of the flow along the axial direction, and geometries in the form of mesh file, which can be further used as input to codes for CFD analysis.

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Internal Ballistic Code ; Grain Burnback ; Minimum Distance Function ; Solid Rocket Motors

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ID: 139079

Numerical simulation of a hypersonic air intake / Saha , Soumyajit; Chakraborty , Debasis

Chakraborty , Debasis	Article
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Numerical simulations were carried out to study the unsteady flow in an intake of hypersonic air-breathing vehicle. Unsteady RANS simulations were performed to examine started flow of the intake when cowl surface is parallel to the ramp surface. Though started, the flow was unsteady due to flow separation bubbles inside intake. Intake with larger cowl opening at which intake unstarted was also simulated. Simulations indicated unstarted flow, with large pressure oscillations. The numerically simulation results match reasonably well with experimental data. Calculated unstarting Mach number was found to be 3.0-3.2 in comparison of wind tunnel data of 3.6 for the same cowl opening angle.

Key Words

Numerical Simulation ; Computational Fluid Dynamics ; Hypersonic Flow ; Air Intake ; Intake Unstarting

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