On a reduced-order model-based optimization of rotor electro-thermal anti-icing systems
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 10 January 2022
Issue publication date: 17 June 2022
Abstract
Purpose
Responsible for lift generation, the helicopter rotor is an essential component to protect against ice accretion. As rotorcraft present a smaller wing cross-section and a lower available onboard power compared to aircraft, electro-thermal heating pads are favored as they conform to the blades’ slender profile and limited volume. Their optimization is carried out here taking into account, for the first time, the highly three-dimensional (3D) nature of the flow and ice accretion, in contrast to the current state-of-the-art that is limited to two-dimensional (2D) airfoils.
Design/methodology/approach
Conjugate heat transfer simulation results are provided by the truly 3D finite element Navier–Stokes analysis package-ICE code, embedded in a proprietary rotorcraft simulation toolkit, with reduced-order modeling providing a time-efficient evaluation of the objective and constraint functions at every iteration. The proposed methodology optimizes heating pads extent and power usage and is versatile enough to address in a computationally efficient manner a wide variety of optimization formulations.
Findings
Low-error reduced-order modeling strategies are introduced to make the tackling of complex 3D geometries feasible in todays’ computers, with the developed framework applied to four problem formulations, demonstrating marked reductions to power consumption along with improved aerodynamics.
Originality/value
The present paper proposes a 3D framework for the optimization of electro-thermal rotorcraft ice protection systems, in hover and forward flight. The current state-of-the-art is limited to 2D airfoils.
Keywords
Acknowledgements
Financial support for this work was provided by the NSERC-Lockheed Martin-Bell Helicopter Industrial Research Chair. The authors also recognize Calcul Quebec for the computational resources which helped expedite numerical simulations. The valuable comments from the CFD laboratory colleagues, especially Dr Vincent Casseau, are also acknowledged.
Citation
Targui, A. and Habashi, W.G. (2022), "On a reduced-order model-based optimization of rotor electro-thermal anti-icing systems", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 32 No. 8, pp. 2885-2913. https://doi.org/10.1108/HFF-06-2021-0417
Publisher
:Emerald Publishing Limited
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