A thermal boundary control method for a flexible thin disk rotating over critical and supercritical speeds

Pei, Yong-Chen, Chatwin, Chris, He, Ling and Li, Wen-Zuo (2017) A thermal boundary control method for a flexible thin disk rotating over critical and supercritical speeds. Meccanica, 52 (1). pp. 383-401. ISSN 0025-6455

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Abstract

In practice a rotating flexible thin annular disk has to be operated at low speed, because three types of dynamic instabilities inevitably occur around critical and supercritical speeds, namely: aeroelastic, parametric and thermoelastic. The rotating disk is clamped and driven by a drive shaft attached to the disk inner edge. The external action of the flowing surrounding air causes the aeroelastic instability; a slider mass-damper-spring-friction moving load causes parametric instability; and disk/slider interface friction heat can cause thermoelastic instability. A thermal boundary control method is used to induce disk thermal membrane stresses utilizing drive shaft temperature increments to stabilize these dynamic instabilities. Fundamental investigations are made of disk temperature distribution, thermal stress, natural frequency, dynamic stability and steady state amplitude to validate and demonstrate the viability of the new control method. The thermal boundary control method offers valuable opportunities for rotating disk applications operating over critical and supercritical high speeds with high efficiency.

Item Type: Article
Keywords: Rotating disk • Boundary control • Thermal stress control • Dynamic stabilization • Parametric instability • Aeroelastic instability • Thermoelastic instability
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QA Mathematics > QA0299 Analysis. Including analytical methods connected with physical problems
Q Science > QA Mathematics > QA0801 Analytic mechanics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TA Engineering (General). Civil engineering (General) > TA0174 Engineering design
T Technology > TA Engineering (General). Civil engineering (General) > TA0329 Engineering mathematics. Engineering analysis
T Technology > TJ Mechanical engineering and machinery > TJ0170 Mechanics applied to machinery. Dynamics
T Technology > TJ Mechanical engineering and machinery > TJ0181 Mechanical movements
T Technology > TJ Mechanical engineering and machinery > TJ0210.2 Mechanical devices and figures. Automata. Ingenious mechanisms. Robots (General)
T Technology > TJ Mechanical engineering and machinery > TJ0212 Control engineering systems. Automatic machinery (General)
Depositing User: Chris Chatwin
Date Deposited: 05 Apr 2016 10:08
Last Modified: 04 Sep 2017 13:50
URI: http://sro.sussex.ac.uk/id/eprint/60327

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