LASER BRAZING CERAMICS TO METALS

THE COOLING SYSTEMS USED WITH THE DIESEL ENGINES OF UNMANNED AERIALVEHICLES (UAVS) CONSISTS OF A LARGE LIQUID-TO-AIR HEAT EXCHANGER. THIS HEAT EXCHANGER REQUIRES A LARGE FRONTAL AREA, WHICH CAN LEAD TO PACKAGING PROBLEMS AND AN INCREASE IN THE UAV-S AERODYNAMIC DRAG. ATSS HAS DEVELOPED A TECHNOLOGY FOR FABRICATING EXTREMELY COMPACT HEAT EXCHANGERS, WHICH USES ETCHED AND BONDED LAMINATED FOIL STACKS. ANALYSES INDICATE THAT, RELATIVE TO CONVENTIONAL HEAT EXCHANGER DESIGNS, AFACTOR OF MORE THAN FIVE REDUCTION IN CORE VOLUME CAN BE ACHIEVED WITH THE ATSS APPROACH. THE PROPOSED PHASE I EFFORT INCLUDES ANALYTICALSTUDIES AND LIMITED FABRICATION AND EXPERIMENTAL STUDIES TO DEMONSTRATE THE APPROACH.