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Investigation to Mach number 2.0 of shock-positioning control systems for a variable-geometry inlet in combination with a J34 turbojet engine

Description: Report presenting shock-position controls designed to actuate the translating spike and variable bypass of a variable-geometry inlet in the 8- by 6-foot supersonic tunnel. The operation of the inlet was observed in combination with a J34 turbojet engine at a range of Mach numbers. Results regarding terminal-shock-positioning control systems and combination control are provided.
Date: December 20, 1954
Creator: Leissler, L. Abbott & Nettles, J. Cary
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Investigation of Control Signals and the Nature of Stall and Surge Behavior in a Turbojet Engine

Description: Memorandum presenting an axial-flow turbojet engine operated on a sea-level static test stand to determine whether or not detectable signals were present in pressures and blade stresses that are usable as stall warnings in control applications. Surge and stall behavior were closely examined for the unique characteristics that could be used to control engine behavior in the vicinity of surge and stall. Results regarding a steady-state survey, acceleration study, investigation of an optimalizing … more
Date: December 20, 1954
Creator: Delio, G. J. & Stiglic, P. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Investigation of Stage Performance of J71 Three-Stage Turbine

Description: "An experimental investigation of the stage performance of the J71 three-stage turbine at design speed and pressure ratio was conducted as part of a program involving research on the design and operational characteristics of high-work-output multistage axial-flow turbines. The investigation indicated that the over-all work output of the turbine based on temperature measurements at design speed and pressure ratio was 95 percent of the design value, with the greatest loss in work output and effic… more
Date: December 20, 1954
Creator: Forrette, Robert E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental investigation of acceleration characteristics of a turbojet engine including regions of surge and stall for control applications

Description: The acceleration characteristics, in the region of maximum acceleration and compressor stall and surge, of an axial-flow turbojet engine with a fixed-area exhaust nozzle were determined by subjecting the engine to fuel flow steps, ramps, and ramps with a sine wave superimposed. From the data obtained, the effectiveness of an optimalizer type of control for this engine was evaluated. At all speeds above 40 percent of rated, a maximum acceleration was not obtained until the engine reached the poi… more
Date: December 20, 1954
Creator: Stiglic, Paul M.; Schmidt, Ross D. & Delio, Gene J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Formulas Pertaining to Weak-Shocks

Description: Certain solutions of the cylindrical wave-equation, such as the Possio integral, which are needed in the investigation of 2-dimensional weak-shocks are are determined in this paper.
Date: December 20, 1954
Creator: Owens, O. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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