A study on energy norm as an alternate approach to mesh convergence on circumferential disk dovetail of aircraft engine compressor

Nithesh Naik, Ritesh Bhat, Prajwal Shenoy, George Varghese, C. S. Suhas Kowshik

Research output: Contribution to journalArticle


Finite element methods solve complicated computational problems, which requires optimized input data to obtain a converged solution to the problem and arrive at accurate results from simulations. However, the calculations obtained by interpolations of derivatives at the nodes result in mesh discretization error. It is observed that the increase in the mesh density the reduces the error, Hence, in the current study, finite element analysis of the complicated models related to gas turbines is performed with the mesh density being increased iteratively, to observe the trend of convergence of the solution along with the error associated. In the current study, dovetail shaped axisymmetric model present in aircraft engine compressor disks for mounting the compressor blades along the disk periphery is modelled using software CATIA® and analysis is carried out using ANSYS®. The results showed the response of peak stress values in correspondence to energy error showing that the energy norm error can be used as criteria for testing the convergence of the solution. The study shows that normalized percentage error in energy is in the range of 6% to 8% for the converged solution.

Original languageEnglish
Pages (from-to)1293-1301
Number of pages9
JournalInternational Journal of Mechanical Engineering and Technology
Issue number13
Publication statusPublished - 01-12-2018
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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