A fluidic method of inlet guide vane control for jet engines

✍ Scribed by G.E. Davies

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 713 KB
• Volume: 6
• Category: Article
• ISSN: 0005-1098
• DOI: 10.1016/0005-1098(70)90007-5

✦ Synopsis

m&hode fluidique de commande de l'aube d'entr6e d'un moteur ~t r6action Methode zur Regelung der Eingangsleitschaufeln eines Strahltriebwerkes mittel Fluidics FI4~O-rIHeBMaTrlqeCIfl~ MeTO]I ynpaBJIeHa,q BXO~IHOfi ~onacTmo peaxTrIBHOrO ~BI4I'aTeJ-tfl G. E. DAVlES1-

Fluidic pulse timing to microsecond accuracy is used in a simple digital system with serve hydraulic boost to vary the geometry of a jet engine compressor.

Sununary--This paper describes a fluidic system for controlling the inlet guide vanes to the high pressure compressor of a two-spool jet-engine. The system employs mainly digital elements and operates by comparing the transmission time of a pulse in a temperature sensitive pneumatic delay line with a similar time delay dependent on engine speed. A digital output is obtained and used to drive a hydraulic serve system which operates the guide vanes. An ultra-sensitive pulse time comparator working to a tolerance of + 5//see enables the control parameter NMx/T2 to be measured to within + 0.15 per cent.