...Kali Charan Nayak One of the basic assumptions of the traditional labyrinth seal leakage calculation is that rotation has minimal or no effect on seal leakage. With the advancement of gas turbine technology, to achieve high performance, seals are run at tight clearances and very high rotational...

... by the ASME Headquarters March 12, 2004. Associate Editor: D. Assanis. 20 January 2003 12 March 2004 09 02 2005 engines ball bearings friction lubrication thermal properties heat transfer mechanical contact rotation The study reported here is concerned with friction...

... mounted in the middle of a Z-shaped shaft. The two ends of the shaft rotate, while the disk “nutates,” performs a wobbling motion without rotating around its axis. The motion of the disk circumference prescribes a portion of a sphere. A portion of the area of the disk is used for intake and compression...

... of the two modes at zero and two additional engine speeds must be calculated using the centrifugal stiffening option in the finite element code. This was done for the second and third modes and the resulting frequencies are shown in Table 1 . Frequencies of 2nd and 3rd modes Rotational Speed...

... experimental data and supporting analysis of real rotating components. This paper presents the results of a unique experimental method and data analysis study of multiple damping sources seen in actual turbine components operating at engine conditions. The contributions of both aerodynamic and structural...

..., February 2000; final revision received by the ASME Headquarters September 2001. Associate Editor: M. Mignolet. 01 February 2000 01 September 2001 19 06 2002 turbines rotation modelling vibrations frequency response engineering computing finite element analysis Small...

... carried out in a purpose-built rotating-disc rig, and the Reynolds-averaged Navier-Stokes equations were solved using two-dimensional (axisymmetric) and three-dimensional computational codes, both of which incorporated low-Reynolds-number k -ε turbulence models. The free-vortex flow, which occurs inside...