Geometric parameter-based optimization of the die profile for the investment casting of aerofoil-shaped turbine blades

Yiwei Dong, Dinghua Zhang, Kun Bu, Yangqing Dou, Wenhu Wang

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Dimensional accuracy is one of the most important criteria in the investment casting of turbine blades for aero engine applications. Although investment casting is an ideal route for producing net-shaped components, it necessitates accurate determination of the casting die profile. To avoid extensive modifications on the die cavity shape, this study proposes a simple but efficient inverse design method that adjusts certain geometric parameters to establish the die profile. Parameterized modeling is achieved by identifying the geometric parameters that describe the mean camber line of the blade profile. Meanwhile, blade shrinkages at different positions are effectively remedied through the adjustment of the parameters using the inverse iteration algorithm proposed in this paper. The relative positions among the cross-sections can also be varied to rectify the twist deformation of the blade, thereby guaranteeing the dimensional accuracy of the turbine blades. The applicability of this method is validated using numerical simulation data and experimental results.

Original languageEnglish
Pages (from-to)1245-1258
Number of pages14
JournalInternational Journal of Advanced Manufacturing Technology
Volume57
Issue number9-12
DOIs
StatePublished - Dec 2011

Keywords

  • Deformation compensation
  • Die design
  • Geometric feature parameter
  • Inverse iteration algorithm
  • Investment casting
  • Numerical simulation

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