WEBINAR: Rank-n NonLinear Harmonic Method

Automotive & Transportation Aerospace & Defense Energy & Power Generation     09.09.2020


Register here


4 PM CET (click on the register button to see your local time)


Not available for this time slot? Register anyway and we’ll send you the recording!

The flow field in turbomachinery is dominated by inherently unsteady flow features such as blade-row interactions, blade vibration, inlet distortions, or high thermal gradients. Perturbations due to propulsion-airframe integration, aircraft maneuvers, crosswind, and temperature non-uniformities coming from the outlet of combustors are just a few of the many sources that can undermine the performance, stability, and durability of gas turbine engines.

NUMECA's Nonlinear Harmonic method (NLH) enables a better understanding of the propagation of flow non-uniformities into turbomachinery components by accurately and efficiently modeling turbomachinery configurations that are subject to periodic variations.

This webinar will cover the latest development of the NLH method: the rank-n. This new feature unlocks the possibility of simulating unsteady phenomena across a theoretically limitless number of turbomachinery rows: turbomachinery engineers can now benefit from more realistic flow assessments, leading to more precise and reliable designs.

In this 40-minutes webinar we will cover:

  • An introduction to the Nonlinear Harmonic Method.
  • What is the rank-n in the NLH method and 
  • A case study of the propagation of hot streaks through several stages of an axial turbine.
  • What’s to come on NUMECA tools for turbomachinery simulations.






NLH rank-n computation of a multi-stage axial turbine
Instantaneous field of static temperature reconstructed in time at 90% span. Blade passing and hot streaks flow distortion unsteady perturbations modeled with 3 Fourier harmonics








Share this event: