Probabilistic analysis method of turbine blisk with multi-failure modes by two-way fluid-thermal-solid coupling

Cheng Lu, Yun Wen Feng, Cheng Wei Fei, Xiao Feng Xue

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

This study develops multi-extremum response surface method (MERSM) for the probabilistic analysis of aeroengine turbine blisk with the coexistence of many failure modes by considering two-way fluid-thermal-solid coupling under complex working condition. The mathematical model of MERSM was established with respect to the random input variables of inlet temperature, inlet velocity, density of material, and rotor speed, and the output responses of the maximum values of deformation, stress, and strain. The comprehensive probabilistic analysis of turbine blisk was completed based on MERSM. The results demonstrate that the comprehensive reliability degree of turbine blisk is 0.9944 when the allowable deformation, stress, and strain are 2.6 × 10−3 m, 1.26 × 109 Pa, and 6.75 × 10−3 m/m, respectively. The main factors influencing the comprehensive reliability degree of turbine blisk are rotor speed and gas temperature. The secondary factors are inlet velocity and density of material. As revealed from the comparison of methods, MERSM improves the computational speed and efficiency with the guarantee of accuracy. The efforts of this paper provide a promising approach for the nonlinear transient reliability analysis of complex structures with multi-failure modes and two-way fluid-thermal-solid coupling.

Original languageEnglish
Pages (from-to)2873-2886
Number of pages14
JournalProceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
Volume232
Issue number16
DOIs
StatePublished - 1 Aug 2018

Keywords

  • multi-extremum response surface method
  • multi-failure modes
  • probabilistic analysis
  • Turbine blisk
  • two-way fluid-thermal-solid coupling

Fingerprint

Dive into the research topics of 'Probabilistic analysis method of turbine blisk with multi-failure modes by two-way fluid-thermal-solid coupling'. Together they form a unique fingerprint.

Cite this