摘要

Modeling and experimental studies of the ignition and combustion of single boron particles conducted at Atlantic Research in recent years are outlined and effects of various parameters (such as temperature-composition-time profiles seen by the particles) are discussed. In addition, extension and integration of the single particle models with additional relationships to treat such phenomena as boron dust cloud ignition and combustion (including flame-speed calculations), agglomerate ignition, effects of various "aids" on boron ignition, and ignition and combustion of boron in actual combustors are discussed. (Important among the results of such studies is the accurately predicted deleterious effects of low combustor operating pressure on boron combustion efficiency.) Finally, the important subject of capture of the heat of condensation of boron oxides and hydroxides (in excess of 25 percent of the potential fuel heating value) during nozzle expansion processes is discussed.