Results 81 to 90 of about 296,793 (263)
PREDICTION OF LEAKAGE FLOW AND ROTORDYNAMIC CHARACTERISTICS FOR AN ECCENTRIC LABYRINTH GAS SEAL [PDF]
Journal of Engineering Science and Technology, 2017 Labyrinth seals are key elements to limit leakage flow between rotating and stationary parts of turbo machines. However, these seals can modify the rotordynamic stability of machines.
MOHAMED KAMOUNI
doaj
Analytical prediction of labyrinth-seal-flow-induced arotor excitation forces [PDF]
An analytical method to calculate the rotor excitation forces arising from labyrinth seals is presented. The objective is to model the gas flow through the seal clearance passages and cavities when the rotor is positioned eccentricly relative to the ...
Rajakumar, C., Sisto, E.
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Some considerations of the performance of two honeycomb gas path seal material systems [PDF]
A standard Hastelloy-X honeycomb material and a pack aluminide coated honeycomb material were evaluated as to their performance as labyrinth seal materials for aircraft gas turbine engines.
Bill, R. C., Shiembob, L. T.
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Effect of Clearance and Cavity Geometries on Leakage Performance of a Stepped Labyrinth Seal
, 2020 This study evaluated the leakage characteristics of a stepped labyrinth seal. Experiments and computational fluid dynamics (CFD) analysis were conducted for a wide range of pressure ratios and clearance sizes, and the effect of the clearance on the ...
Minjae Hur +6 more
semanticscholar +1 more source
Influence of disk leakage path on labyrinth seal inlet swirl ratio [PDF]
The results of numerous investigators have shown the importance of labyrinth seal inlet swirl on the calculated dynamic stiffness of labyrinth seals. These results have not included any calculation of inlet leakage swirl as a function of geometry and ...
Kirk, R. Gordon
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Experimental Investigations of Exciting Forces Caused by Flow in Labyrinth Seals [PDF]
, 1991 The interaction of the flow through the labyrinth seals with the shaft of the rotor can have an effect on the stability of turbomachines. Thus, the excited forces, so-called cross forces or nonconservative forces, arise, which act perpendicular to the ...
Stetter, H., Thieleke, G.
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Rotordynamic coefficients for stepped labyrinth gas seals [PDF]
The basic equations are derived for compressible flow in a stepped labyrinth gas seal. The flow is assumed to be completely turbulent in the circumferential direction where the friction factor is determined by the Blasius relation.
Scharrer, Joseph K.
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Seals Research at Texas A/M University [PDF]
, 1991 The Turbomachinery Laboratory at Texas A&M has been providing experimental data and computational codes for the design seals for many years. The program began with the development of a Halon based seal test rig.
Morrison, Gerald L.
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Experimental rotordynamic coefficient results for honeycomb seals [PDF]
Test results (leakage and rotordynamic coefficients) are presented for seven honeycomb-stator smooth-rotor seals. Tests were carried out with air at rotor speeds up to 16,000 cpm and supply pressures up to 8.2 bars.
Childs, Dara W., Elrod, David A.
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Unsteady Flow In A Labyrinth Seal
, 2018 Unsteady flow phenomena in turbomachinery are a source of aerodynamic losses and can adversely affect the durability of an engine. Examples for such flows are the flow through the cavities of the turbine hub or shroud labyrinth and rim seal. The re-entering flow causes mixing losses with the main flow and increases incidence on the following stator. In
Wein, Lars, Seume, J. R., Herbst, F.
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