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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-483-0

ISBN Online: 978-1-56700-482-3

4th Thermal and Fluids Engineering Conference
April, 14–17, 2019 , Las Vegas, NV, USA

CDF AND FEA BASED SIMULATION APPROACH FOR IMMERSION QUENCHING OF JET ENGINE FAN BLADES

Get access (open in a dialog) pages 381-386
DOI: 10.1615/TFEC2019.cmd.027270

摘要

Jet engine fan blades are becoming larger providing higher bypass ratios while lowering fuel consumption. Manufacturers are combining the advances in materials and design for efficient heat treatment techniques in order to reduce the weight ratio by replacing heavier metals with light low-cost alloys. An accurate prediction and optimization of the heat treatment process is one of the most important factors to reduce fuel consumption. Present paper summarizes the methodology to numerically predict the heat treatment characteristics during immersion quenching processes of jet engine fan blades. On the surface of heated parts boiling phase change occurs, where different boiling regimes strongly influence the cooling. The heat transfer between the pre-heated fan blades and the sub-cooled liquid is handled by the Euler-Eulerian multi-fluid model available in a commercial Computational Fluid Dynamics (CFD) code. The transient response of the temperature of the fan blade, local temperature gradients and the heat transfer coefficient have been the focus of the present research. The time-and-space-resolved solid temperature field obtained in the multi-domain CFD simulation (liquid and solid domains are computed simultaneously) was mapped to a Finite Element Analysis (FEA) model. Next, a structural analysis has been carried out to compute the time-dependent displacements and stresses within the fan blade during and after the immersion quenching process. The methodology can detect critical areas of high residual stresses and deformations during and after heat treatment. This helps optimizing the quenching process for high product quality. Component failure during operation and warranty issues are minimized.