An automatic restart control system for an axisymmetric mixed-compression inlet
Gary L. Cole, George H. Neiner, Michael J. Crosby, Lewis Research Center, United States. National Aeronautics and Space Administration
National Aeronautics and Space Administration [for sale by the Clearinghouse for Federal, Scientific, and Technical Information, Springfiel, Va.], 1969 - Technology & Engineering - 38 pages
Automatic restart control system for axisymmetric mixed compression inlet.
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analog computer approximately buzz bypass door area centerbody position choked-exit plug closed-loop control cm from cowl-lip cold pipe cold-pipe tests compressor stall compressor-face station continuous schedule controlled restart cowl cowl-lip see fig diffuser exit dimensionless disturbance engine airflow Engine exhaust gas Engine mechanical speed exhaust gas temperature figure 12(a Free-stream Mach number frequency responses function of centerbody hertz increase indicate inlet capture area inlet pressure inlet station inlet unstart inlet was unstarted mass-flow newtons per square operation overboard bypass peak recovery condition percent psia psia/line ratio across compressor recovery and distortion restart control system restart cycle Reynolds number setpoint shown in figure slewing rate square centimeter started and unstarted steady-state step schedule Supersonic terminal shock control terminal shock position throat total pressure throat-exit static pressure total pressure ratio total pressure recovery turbojet unstart signal unstart transient unstarted conditions unstarted inlet upstream value of Hg/Hg values of P^g