Computational investigations for the estimation of leakage flow-rate through radial labyrinth seals for gas turbine are reported in this paper. Experimental static tests were conducted over a range of pressure ratios, varying from 1.00 to 1.20 and for three radial clearance values of 1.07, 0.84 and 0.66mm. FLUENT computer package is used to obtain analytical results for various parameters: rotational speed, pressure ratio and clearance. The results are presented in the form of the streamline patterns, velocity vectors, static pressure and turbulent kinetic energy in the seal passages. It was found that the leakage characteristics are different for radially outward and inward flows for the same seal geometry.
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