Transcription of Performance of a Boundary Layer Ingesting (BLI) …
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Performance of a Boundary Layer Ingesting (BLI) …
American Institute of Aeronautics and Astronautics1 Performance of a Boundary Layer Ingesting (BLI)Propulsion SystemA. P. Plas*, M. A. Sargeant**, V. Madani**, D. Crichton**, E. M. Greitzer*,T. P. Hynes**, C. A. Hall**Gas Turbine Laboratory, Massachusetts Institute of Technology, Cambridge, MA** Engineering Department, University of Cambridge, Cambridge, UKThis paper presents an assessment of the Performance of an embedded propulsion systemin the presence of distortion associated with Boundary Layer ingestion. For fan pressureratios of interest for civil transports, the benefits of Boundary Layer ingestion are shown tobe very sensitive to the magnitude of fan and duct losses.
American Institute of Aeronautics and Astronautics 3 P BLI = m ˙ 2 u j 2 u w 2= m ˙ 2 u u w 2 = F 2 ()u w + u . (5) Since uj > uw, comparison of Eqs.(2) and (5) shows that the power needed for the podded engine to propel the
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