Abstract

P experimental evidence leads to the conclusion that a certain particle temperature is the most important prerequisite for boron particle ignition. For particle heating, a model concept of a hybrid gas generator is chosen. The resulting thermal state of the boron particles is characterized by a T* temperature which is derived for a restricted thermodynamical equilibrium defined by the suppression of chemical contact between the reacting substances of the gas generator and the boron fuel, which is set to be in thermal contact only. A temperature diagram is derived with the help of an existing computer program for thermochemical calculations, in which the ignition readiness of the boron fuel is displayed in terms of a r* temperature depending on a varied fraction of the boron fuel, which is set to be combusted in the primary process in order to achieve the temperature necessary for ignition of the remainder of the boron.

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