...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...

...Dara W. Childs; Matthew Graviss; Luis E. Rodriguez Test results are presented for a smooth seal and three centrally grooved seals that are representative of buffered-flow oil seals in centrifugal compressors. The seals are short ( L ∕ D ≅ 0.21 ) , with a diameter of 117 mm and a nominal radial...

... conditions, and side loads are used to conduct the nonlinear rotordynamic response time transient analysis at increasing shaft speeds. Figure 7 displays the finite element structural models for the rotor and floating ring bearings. The model includes lumped masses for the compressor and turbine wheels...

... and compressors, and it is currently getting additional prominence due to stringent emission regulations. The bounds stem from an earlier version, developed by the authors using a semi-empirical approach, and published in the 1970s in Russian technical journals. A semi-empirical background of the bounds...

... rig for seal design and optimization. seals (stoppers) computational fluid dynamics rotors design engineering compressors numerical analysis CFD hole-pattern seal gas seal damper seal rotordynamic coefficients centrifugal compressor The operation of high-performance...

... in design to a gas tooth on stator annular labyrinth seal. The main difference is the windback seal has only one tooth, which continuously winds around the shaft like a screw thread. These seals are used in gas compressors to isolate the gas face seal from bearing oil. A purge gas is passed through the seal...

...Dara W. Childs; Luis E. Rodriguez; Vito Cullotta; Adnan Al-Ghasem; Matthew Graviss Test results are presented for laminar-flow seals that are representative of buffered-flow oil seals in centrifugal compressors. The seals are short ( L ∕ D ≅ 0.21 ) , with a diameter of 117 mm and a clearance...

.... San Andre´s. 11 July 2000 09 October 2001 31 05 2002 aerodynamics gas turbines seals (stoppers) compressors modelling stability mechanical engineering Navier-Stokes equations Gas turbines contain a large number of seals, stationary rings that operate within...

...Coda H. T. Pan, Engineering Consultant, The pressurization-flow characteristic of a helical viscous compressor is basic to the design of precision air bearings and non-contact gas seals which make use of the spiral-grooved surface feature. The method of Compressible Narrow Groove Analysis (CNGA...

... Refr. Conf. , Purdue, pp. 153–158. Sundaresan , S. G. , and Finkensatad , W. R. , 1992 , “ Polyalkylene Glycol and Polyolester Lubricant Candidates for Use with HFC-134a in Refrigeration Compressors ,” ASHRAE J. , 92 , pp. 796 – 803 . Wardle, F. P., Jacobsson, B., Dolfsma, H...

...A. T. Prata; J. R. S. Fernandes; F. Fagotti Piston dynamics plays a fundamental role in two critical processes related to fluid flow in reciprocating compressors. The first is the gas leakage through the radial clearance, which may cause considerable loss in the pumping efficiency of the compressor...