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MAGNETOGASDYNAMIC THRUST VECTORING OF ROCKET MOTORS, INCLUDING THE EFFECTS OF FINITE ELECTRON-ION RECOMBINATION KINETICS. A PARAMETRIC STUDY
AEROCHEM RESEARCH LABS INC PRINCETON NJ
Universal curves are presented to facilitate the prediction of magnetohydrodynamic control forces in rocket motor practice. Equilibrium calculations are given for 21 rocket propellant combinations with alkali atom seeding. Since the nozzle expansion process can lead to electrical conductivities at the exit section much larger than those corresponding to local ionization equilibrium, a graphical method is introduced and discussed which enables quantitative estimates to be made of the extent of the nonequilibrium enhancement as well as the conditions under which it can be ignored. By combining this material general information is presented as to the independent factors favoring maximum exhaust jet interaction with the applied magnetic field. Some of the major factors other than large field strength giving rise to favorable conditions are presence of low ionization potential materials in hot chambers, small values of the effective specific heat ratio, moderate rather than extremely large chamber pressures and large physical size.
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