مقاله انگلیسی بهینه سازی عددی آزمایش های شکل باله یک مبدل حرارتی سطحی هوا/روغن
Abstract
Keywords
Nomenclature
Introduction
Numerical methodology.
Numerical verification and validation
SACOC optimization
Conclusions
CRediT authorship contribution statement
Declaration of Competing Interest
Acknowledgements
References
Abtract
Efficient aircraft engine designs imply the presence of a surface air/oil heat exchanger placed at the bypass flow separation of the engine. The heat exchanger consists of several parallel longitudinal fins that increase the contact area to obtain a higher heat dissipation rate. The design of these fins is an important task as the pressure drop generated by the presence of the heat exchanger is the largest drawback to be minimized in the final setup. Consequently, an efficient design of the fins that optimizes the global performance of the heat exchanger is highly demanded. The result of this optimization process should minimize the pressure drop caused by the exchanger without decreasing the heat transfer. The optimization methodology proposed in this work is split in two independent parts: in the first one, the fin shape is optimized using the adjoint method and the derived sensitivity function that controls the position of the fin shape design. In parallel, the range of fin thickness and distance between fins was investigated to have an optimized fin distribution for a given SACOC width. Once the geometry was optimized, the coupled conjugate heat problem is numerically solved using realistic conditions showing good accuracy in the two presented validations. The result for the optimized geometry presents a substantial pressure drop reduction with little heat transfer variation, addressing the objectives that motivated the present study