ANALYSIS ON DETERMINATION OF LEAKAGE FLOW AND SEPARATION FORCE OF GAS TURBINE ENGINE

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G. Shantha G. Sudha

Abstract

Determination of leakage flow and separation force of gas turbine engine mainly seals and
similar devices represents a cinque application of the qziasi-one-dimensional
compressible.flow equation. This nonlinear equation has been solved numerically by
varioztszithers’, for nozzle, diffuser, duct, seal, and similar applications. It has been found,
however, that the solitonmalteds reported in tile literature may be inoperative for seals wit11
small clearance to-length ratio, or when the seal is appreciably distorted. This deficit is cawed
by a bindery layer type behaviourresulting, from a singularity in twovicinities of sonic flow,
i.e., when the flow Mach number approaches unity. This new analysis considers the
combined effects of entrance losses, fluid inertia, fluid,friction, area change, and,fluid
turbulence and is applicable to steady, one dimensional gas,/2ow in general. The compacter
program acetylates the distribution of pressure, temperature, velocity, Mach cumber, and
Reynolds cycleralong the flow path.

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