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RISDevelopment of a Harmonic Balance Method-Based Numerical Strategy for Blade-Tip/Casing Interactions: Application to NASA Rotor 37
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this study, a frequency-domain approach based on the harmonic balance method coupled to a predictor-corrector continuation algorithm is implemented for the qualitative analysis of blade-tip/casing contacts in aircraft ...
Open NASA Blade Models for Nonlinear Dynamics Simulations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This contribution presents a catalogue of open turbomachinery blade models dedicated to nonlinear dynamics simulations. Based on a specifically developed in-house computer code, three-dimensional computer-aided design (CAD) ...
Thermo-Mechanical Modeling of Abradable Coating Wear in Aircraft Engines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In modern turbomachine designs, the nominal clearances between rotating bladed-disks and their surrounding casing are reduced to improve aerodynamic performances of the engine. This clearance reduction increases the risk ...
Investigation on the Robustness of Rotor/Stator Contact Interactions With Respect to Small Mistuning
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, the impact of small mistuning on rotor/stator contact interactions is investigated. First, a detailed study of a rotor/stator interaction between the first bending modes and the second engine order is presented ...
Stability Analysis of an Industrial Blade Accounting for a Blade-Tip/Casing Nonlinear Interface
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates the local stability analysis of periodic solutions corresponding to the nonlinear vibration response of an industrial compressor blade, NASA rotor 37, on which are applied different types of ...
Computation of Isolated Periodic Solutions for Forced Response Blade-Tip/Casing Contact Problems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This article introduces a numerical procedure dedicated to the identification of isolated branches of solutions for nonlinear mechanical systems. Here, it is applied to a fan blade subject to rubbing interactions and ...
Application of Numerical Bifurcation Tracking Strategy to Blade-Tip/Casing Interactions in Aircraft Engines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Building on the regularized-Lanczos harmonic balance method (RL-HBM), a previously developed frequency method, this paper presents a numerical bifurcation tracking strategy dedicated to high-dimensional nonlinear mechanical ...
Validation of the Numerical Simulation of Rotor/Stator Interactions in Aircraft Engine Low-Pressure Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This contribution focuses on the validation of a numerical strategy developed jointly by Safran and Polytechnique Montréal for the simulation and the analysis of blade-tip/casing contact interactions in low-pressure ...
Modeling of Abradable Coating Removal in Aircraft Engines Through Delay Differential Equations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In modern turbomachinery, abradable materials are implemented on casings to reduce operating tip clearances and mitigate direct unilateral contact occurrences between rotating and stationary components. However, both ...
Full Three-Dimensional Rotor/Stator Interaction Simulations in Aircraft Engines With Time-Dependent Angular Speed
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modern aircraft engine designs feature reduced clearances that may initiate structural contacts between rotating and static components. A numerical strategy dedicated to the simulation of such interactions is here enriched ...