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.
Bodies Politic : Disease , Death and Doctors in Britain , 1650-1900
In spite of its intellectual, literary and comic brilliance, this book contains a dark and disturbing, but revealing, message. In some ways, my melancholy reading of Bodies Politic has inevitably been shaped by Roy's recent untimely death. Roy Porter was without doubt the finest social historian of medicine this country, or indeed the world, has produced. Expansive, humorous, intelligent, and incisive, his broad range of historical works has excited and educated several generations of students of history over the past thirty years. His death leaves an unfillable void within the global history of medicine. At the same time, however, this book itself, completed well before his death, is haunted by elements of despair and uncertainty that should make us carefully reconsider not only the purpose and direction of our professional inquiries but also our own mortality.