Abstract
Abstract The cyclic pattern design of fan outlet guide vanes (OGVs) is key to achieving the fan stage performance and to set the aeromechanical behaviour of low-pressure compressor (LPC). Current trend of compact engine architectures leads to the stronger interaction between LPC components, which in turn results in larger modifications in OGV pattern geometry. A thorough verification of OGV patterns is necessary to avoid the risks associated to LPC performance. This paper describes the application of high-fidelity aeroelastic model for evaluating OGV cyclic patterns that are commonly designed using low-fidelity design-optimisation methods. The whole fan system model, described in the first part of this paper, is used to conduct time-accurate unsteady CFD simulations to perform various low-harmonic aeroelastic phenomena investigations simultaneously. The simulation results are post-processed to extract 1EO fan forced response, a measure of OGV buffet and the fan efficiency at multiple flight conditions. Multiple OGV patterns are assessed using this approach to explore the OGV pattern design space. Further, these simulation results are used to produce a Pareto front, which effectively demonstrates the OGV pattern design robustness. This methodology allows comparing various OGV pattern designs against a common set of criteria, to perform design trade-off studies and to identify a right-first-time OGV cyclic pattern design within design timescales.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call