A new type of infrared imaging bolometer, known as the infrared imaging video bolometer ~IRVB! has been under development at the National Institute of Fusion Science ~NIFS! over the last year. A prototype of this diagnostic has been designed and constructed at NIFS and installed on the large helical device ~LHD! and successfully operated. This diagnostic utilizes a 6639030.001 mm gold foil moun...

The dry lubricated bump-type foil air bearing enables a carrying load capacity due to pressure build up in convergent film. Since the provides low power dissipation above lift-off speed and flexible an adaptivity against high temperatures, manufacturing errors or rotor growth, is particular suitable for rotating machineries. corresponding dynamic behavior depends on operational parameters, of s...

With foil bearings, rotors achieve high rotational speeds with less friction and wear. In addition, here the required space is small no peripheral components like liquid tanks or pumps are needed. The drawback a more complex prediction of real behavior in rotordynamic systems. Impedance test rigs suitable for investigating structural-dynamic bearing properties validating theoretical models. Thi...

Definition. Let Kn denote the complete graph of n vertices. The complete multigraph λKn is the complete graph Kn in which every edge is taken λ times. The t-foil (or the t-windmill) is a graph of t edge-disjoint K3’s with a common vertex and the common vertex is called the center of the t-foil. In particular, the 2-foil, the 3-foil, and the 4-foil are called the bowtie, the trefoil, and the qua...

Supercritical CO2 foil bearings are promising bearing technology for supercritical high-speed turbomachinery. The partial derivative method including complete variable perturbation of the compressible turbulent lubrication Reynolds equation is effective to predict frequency dependent dynamic stiffness and damping coefficients bearings. In this research, structural model was introduced into then...

A new pressure measurement technique for measuring the pressure over rotating blades of industrial axial flow fan is described in this paper. The new technique is called pressure sensitive foil (PS-Foil) technique. In this technique a very thin aluminum foil is coated with pressure sensitive paint using anodization method. The resulting PS-Foil can be stick over any existing blade using a very ...