Rotor-Bearing Dynamics Technology Design Guide. Part VI. Status of Gas Bearing Technology Applicable to Aero Propulsion Machinery

Pan, C. H. T.

doi:10.21236/ada094167

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Stabilization Strategies: a Brief Overview1

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2011

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“…A detailed overview and discussion of these measures would be outside the scope of this paper. For this purpose, the reader is referred to [16,17]. We will limit ourselves for the moment by classifying the measures for enhancing the stability into two categories.…”

Section: Stabilization Strategies: a Brief Overviewmentioning

confidence: 99%

Aerodynamic journal bearing with a flexible, damped support operating at 7.2 million DN

Waumans

Peirs

Al‐Bender

et al. 2011

J. Micromech. Microeng.

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As the bottleneck for the successful application of ultra-miniature gasturbines is predominantly imposed by limitations in currently available high-speed bearing technology, new bearing concepts have to be developed. This paper reports on the achievement of a record speed of 1 203 000 rpm (= 7.2 million DN) on aerodynamic journal bearings. The concept and implementation of the flexible, damped bearing support are outlined and its effectiveness for the stabilisation of high-speed gas bearings is demonstrated experimentally. The following related topics are briefly studied: (i) characterisation of different elastomeric support materials; (ii) discussion of observed measurement artefacts at high speed; and (iii) an analysis of the frictional loss sources.

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Section: Stabilization Strategies: a Brief Overviewmentioning

confidence: 99%