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Prediction of Real Gas and Non-Equilibrium Effects in the Gas Dynamics of Canister Launch Missile

R. SUDHAKAR, M. VENKANNA, B. V. PAPA RAO, TESSY THOMAS

Abstract


There are many techniques have been developed to launch the missile from the canister. Two general categories of canister launched techniques are recognized, Self-Eject Launch (Hot Launch) and Gas Eject Launch (Cold Launch). Each specific technique has its own particular benefits and problems. One of the most reliable techniques for missile launch is Gas Eject technique in which hot gas generator is used to provide the force to drive the missile out of the canister. In this procedure, a solid propellant gas generator gas is ignited in the closed volume (Reservoir/breech) below the missile in the canister and resultant pressurization forces the missile out. In order to study and predict the variation of pressure, temperature and missile motion inside the canister during launch phase, gas dynamic model has been developed with many assumptions like Ideal gas, Constant Specific Heat, Jet impingement Heat loss, Turbulent model etc… In this present study we attempted to implement the presently available advanced techniques to improve the accuracy of launch dynamic predictions. Study has been done by implementing the effects of Real Gas (Variation of Compressibility factor (Z)) and Specific heat at constant pressure (Cp) variation with gas temperature during missile launch phase.

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