... index Munson , J. , and Pecht , G. , 1992 , “ Development of Film Riding Face Seals for a Gas Turbine Engine ,” Tribol. Trans. 1040-2004 , 35 ( 1 ), pp. 65 – 70 . 10.1080/10402009208982090 Alford , J. S. , 1964 , “ Protection of Labyrinth Seals From Flexural...

... requirements, and (5) transcritical operation and whirl instability issues. To enable high-power density the micro-turbomachinery must be run at tip speeds comparable to conventional scale turbomachinery. The rotors of the micro-gas turbines are supported by hydrostatic gas journal and hydrostatic gas thrust...

...Aaron Rimpel; Daejong Kim Recently, gas-lubricated bearings have drawn enormous attention for clean energy conversion/process systems such as fuel cells, micro-gas-turbines, gas compressors, etc. Among many different types of gas bearings, tilting pad gas bearings have many attractive features...

... in this paper are in good agreement with those obtained by Zhu and San Andres [(2007), “Rotordynamic Performance of Flexure Pivot Hydrostatic Gas Bearings for Oil-Free Turbomachinery,” ASME J. Eng. Gas Turbines Power, 129(4), pp. 1020–1027 ] in the published paper. The results validate the feasibility...

.... At 890,000 rpm , the tip speed of the turbine reaches approximately 470 m ∕ s . Using the bearing system developed, the turbo components of a 100 W class gas turbine and an air pump for 1 kW class fuel cells can be tested. Epstein , A. H. , 2003 , “ Millimeter-Scale, Micro-Electro-Mechanical...

...A. D. McNickle, Mem. ASME; I. Etsion, Fellow ASME A new concept of a near-contact gas seal is experimentally investigated. A simulated gas face seal for a high-speed gas turbine engine is used for the investigation. A baseline conventional contacting-type seal is compared with an identical seal...

... , “ An Iterative CFD and Mechanical Brush Seal Model and Comparison With Experimental Results ,” ASME J. Eng. Gas Turbines Power , 121 , pp. 656 – 662 . Bayley , F. J. , and Long , C. A. , 1993 , “ A Combined Experimental and Theoretical Study of Flow and Pressure Distributions in a Brush Seal...

... coefficients. shear deformation rotors damping seals (stoppers) friction stators gas turbines stability Turbomachinery annular seals are provided to limit leakage between regions at different pressures. Seals increase the efficiency of turbomachines; however, they can also significantly...

... for typical large-diameter gas turbine seals and the associated computational cost. • To investigate the sensitivity of the flowfield to design parameters and to geometric details in general. The details of the unsteady flow and aeroelasticity code that are used in this study have already been...

... polycrystalline alloys. High cycle fatigue induced failures in aircraft gas turbine and rocket engine turbopump blades is a pervasive problem. Blade attachment regions are prone to fretting fatigue failures. Single crystal nickel base superalloy turbine blades are especially prone to fretting damage because...