الفهرس 
Introduction &Literature ReviewOnly 14 pages are availabe for public view
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Abstract
The analysis of the rectangular labyrinth seals having several configurations is carried out in this work. Prior to any experimental work a theoretical prediction of the Labyrinth performance for different geometries is required the laminar compressible and ax symmetric flow in a rectangular labyrinth seal is treated and the performance is obtained. The analysis is based on the assumption that adiabatic conditions exist and that the height of the seal to the radius of the shaft is small as is always the case in turbo machines. The theoretical work is capable of handling single cavity in order to compute the pressure ratio loss in stagnation pressure change in density temperature ratio and the variation of inlet to exit mach number across the cavity these quantities are obtained at several leakage flow mach numbers to be used in estimating the required number of cavities to get a minimum allowable leakage rate The model is widely applicable and does not require an estimate of the kinetic energy carry-over coefficient whose value is often uncertain for many untested configurations detailed cavity distributions of basic flow-field quantities are also obtained and presented. The variations of the flow rate parameter with pressure ratio for a single cavity and multi-cavity seals are obtained and presented. The effect of changing the upstream conditions of pressure and temperature on the performance of a Single Cavity Is Examined And Presented. Also The Effect Of Shaft Rotation Denoted As A Rotational Mach Number Is Computed. For a subsonic leakage flow that is not in choked condition, it is concluded in this work that the performance relations of a single cavity can be used to design a multi-cavity Seals to meet an allowable leakage rate.