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Computational and experimental studies were conducted to investigate the heating and cooling of and automotive brake rotor. The experimental study was conducted in order to validate the computational results. Brake rotor temperature was the main response used to prove correlation between the two studies. The objective of the computational model was to consider fluid flow conjugate with heat transfer. To accomplish this, Navier Stokes' equations [1][2] were solved to predict the fluid flow field of the model geometry. This is commonly known as Computational Fluid Dynamics. The results from the fluid flow at the solid-fluid interface was used to calculate heat transfer coefficients for the solid surfaces. These heat transfer coefficients were then used to predict heat exchange between the fluid and solid. Three dimensional conduction and convection were used to compute heat transfer within the fluid and solid.

A wide variety of potentially useful and effective airbreathing aircraft have been postulated to operate at speeds in excess of Mach 3.0 by NASA and the USAF. These systems include hydrogen-fueled transports of interest for very long ranges and airbreathing launch vehicles which are aircraft-type first stage candidates for future space shuttle systems. Other high speed airbreathing systems for possible future military applications include advanced reconnaissance and figher/interceptor type aircraft and strategic systems. This paper presents (1) a chronology of Air Force technical activity on future propulsion concepts, (2) a status report on NASA research on scramjet technology for future systems which may require speeds above Mach 5, and (3) a description of a research vehicle by which advanced propulsion technology and other technologies related to high speed can be demonstrated.