Development of an Experimental Data Base to Validate Compressor-Face Boundary Conditions Used in Unsteady Inlet Flow Computations
Dr. MiNos SajbenDr. Donald D. FreundDepartment of Aerospace Engineering and Engineering MechanicsUniversity of CincinnatiFinal Technical ReportResearch Grant Award fromNational Aeronautics and Space AdministrationNASA Lewis Research CenterPenod of Performance: January 1, 1997 to December 31, 1997May 15, 1998
Unsteady Inlet/Compressor Interaction Experiment to Support the Modeling of Compressor-Face Boundary Conditions
Atmospheric disturbances affecting high-speed, air-breathing propulsion systems may induce rapid flow transients. Such processes usually involve strong interactions between the inlet and the engine, and may lead to undesirable or even unacceptable consequences (e.g. inlet unstart, compressor stall or surge). Their reliable prediction requires, in principle, the simultaneous computation of the flow in both the inlet and the compressor. Such computations, while may be feasible in some simplified form [1,2], are too complex to fit into the cost and time constraint of industrial design processes. Current engineering practice is to perform computations for the two components separately, relying on the compressor face boundary conditions (CFBC’s) to represent the engine for the inlet flow predictions, or the inlet for engine calculations.
The Italian Renaissance: Culture and Society in Italy
In this newly revised edition of his widely acclaimed work, Peter Burke presents a social and cultural history of the Italian Renaissance. He discusses the social and political institutions that existed in Italy during the fifteenth and sixteenth centuries, and he analyzes the ways of thinking and seeing that characterized this period of extraordinary artistic creativity. Developing a distinctive approach, the author is concerned not only with the finished works of Michelangelo, Raphael, Leonardo da Vinci, and others, but also with the social background, patterns of recruitment, and means of subsistence of this "cultural elite." He thus makes a major contribution both to our understanding of the Italian Renaissance and to our comprehension of the complex relations between culture and society. An excellent social history of the lives and culture of the artists and artisans which made it possible for the arts to flourish.