AIR FORCE INQUIRES ABOUT THERMAL MGMT.SOLUTIONS FOR FUTURE AIRCRAFT 8/11/15 - The U.S. Air Force is looking into new thermal management techniques to cool the electronics in future fighter aircraft. “Officials of the Air Force Research Laboratory at Wright-Patterson Air Force Base, Ohio, issued a broad agency announcement Friday (BAA-AFRL-RQKP-2015-0002) for the Hybrid-Cycle … [Read more...]
Thermal Facts & Fairy Tales: Numerical Modeling without Supporting Experimentation
Peter Rodgers Fan modelling is one of the most critical aspects of the analysis of forced-air-cooled systems. Lasance [1] summarized the challenges of modeling air movers such as fans and key factors that need to be taken into consideration. Such factors include the need to model the fan hub, and to account for the swirl velocity coefficient. In addition to the above … [Read more...]
Are Graduate Engineers being Effectively Educated for Today’s Workplace?
Editorial Peter Rodgers, Acting Editor-in-Chief, September 2015 Continuing the June Editorial [1] theme, which discussed the societal aspects of enticing today’s youth into pursuing a career in the engineering profession, this editorial explores if the capabilities of today’s young engineering graduate are being effectively harnessed upon graduation. Otherwise said, is the … [Read more...]
All You Need to Know About Fans
By Mike Turner, Comair Rotron A Basic Fan/Blower Description Fans can be thought of as low pressure air pumps that utilize power from a motor to output a volumetric flow of air at a given pressure. A propeller converts torque from the motor to increase static pressure across the fan rotor and to increase the kinetic energy of the air particles. The motors are typically … [Read more...]
Effective Heat Spreading Angle
Dirk Schweitzer, Infineon Technologies AG, Am Campeon 1-12, 85579 Neubiberg, Germany dirk.schweitzer@infineon.com Introduction To accurately compute the thermal resistance of a layered structure, such as the Junction-to-Case thermal resistance of a power semiconductor, the heat spreading inside the structure has to be considered. The calculation of the spreading resistance is … [Read more...]
