6,125 research outputs found
High stability design for new centrifugal compressor
It is essential that high-performance centrifugal compressors be free of subsynchronous vibrations. A new high-performance centrifugal compressor has been developed by applying the latest rotordynamics knowledge and design techniques: (1) To improve the system damping, a specially designed oil film seal was developed. This seal attained a damping ratio three times that of the conventional design. The oil film seal contains a special damper ring in the seal cartridge. (2) To reduce the destabilizing effect of the labyrinth seal, a special swirl canceler (anti-swirl nozzle) was applied to the balance piston seal. (3) To confirm the system damping margin, the dynamic simulation rotor model test and the full load test applied the vibration exciting test in actual load conditions
Polarized Gluons in the Nucleon
QCD suggests that gluons in the nucleon play an important role in {\it
so-called} ``the proton spin problem''. In this talk, the behavior of the
polarized gluon distribution in the nucleon is discussed by using the
positivity condition of distribution functions together with the unpolarized
and polarized experimental data.Comment: LaTeX file, 9 pages+4 figures not included (available upon request),
Talk presented at the Workshop on GeV Scale Physics as a Probe into New
Physics, Toyama(Japan), 26-28 June, 199
Chemical investigation on inorganic constituents in night soil (excreta) II. On the amounts of Ca, Mg, Na, K, P, Cl, S, Mn, Fe, Cd, Cu, Zn, Ni and Pb in the night soil of inhabitants of the Tohoku district
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