Effect of Heat and Power Extraction on Turbojet-engine Performance


Book Description

In general, with a turbojet engine operating at constant engine speed, bleeding gas from the tail pipe at constant tail-pipe-nozzle area and reduced turbine-inlet temperature caused 2.5 to 4 times as great a loss in thrust as bleeding gas at constant turbine-inlet temperature and reduced tail-pipe-nozzle area.







Effect of Heat and Power Extraction on Turbojet-engine Performance


Book Description

Generalized working charts, prepared by matching experimentally determined component characteristics of a typical axial-flow-type turbojet engine, are presented for determining the effect of shaft-power extraction on engine performance.




Turbulent Boundary-layer Temperature Recovery Factors in Two-dimensional Supersonic Flow


Book Description

An analytical method is presented for obtaining turbulent temperature recovery factors for a thermally insulated surface in supersonic flow. The method is an extension of Squire's analysis for incompressible flow. The boundary layer velocity profile is represented by a power law and a similarity is postulated for squared-velocity the static-temperature-difference profiles.










Investigation of a Full-scale, Cascade-type Thrust Reverser


Book Description

A double set of turning vanes was carried inside the jet tailpipe. To produce reverse thrust, the tailpipe opens into two side sections and the turning vanes move outward to form a V-shaped cascade, which deflects the exhaust-gas flow. Forward and reverse net thrust were measured over a range of engine speeds with the airplane stationary. Taxi tests were made to determine the comparative stopping distances using wheel braking and reverse thrust separately, and a combination of both. The effect of turning-vane spacing on thrust-reverser performance was determined by scale-model tests using unheated air.







Index of NACA Technical Publications


Book Description