Gerlach shaping inspired air intake duct optimization

Somasundaram, V and Balakrishnan, N (2020) Gerlach shaping inspired air intake duct optimization. In: 2nd National Conference on Multidisciplinary Design, Analysis and Optimization, NCMDAO 2019, 21-23 March 2019, Bengaluru; India, pp. 3-18.

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Abstract

Due to the importance of survivability and low observability in the next-generation aircraft and significant contribution of rotating engine components to RCS, inhibiting direct line of sight of aerodynamic interface plane (AIP) is the main design focus of engine air intake duct. This constraint leads to a highly curved shape inducing strong secondary flows, consequently taking engine face distortion and pressure recovery to unacceptable levels. With an objective to eliminate the secondary flow causing lateral pressure gradient without reducing the velocity of the main flow, Gerlach derived a correction factor for modifying the duct cross-sectional shape. Inspired by the performance enhancement this simple procedure could achieve in case of serpentine air intake, the current work aims at evolving a computational fluid dynamics-based optimization procedure for the design of highly curved ducts exploiting the fundamental principle of Gerlach shaping. The highlight of the proposed procedure is that the duct is evolved employing an inviscid modeling of the flow and the candidate optimal configuration thus selected exhibits significantly better performance as compared to the baseline configuration. © Springer Nature Singapore Pte Ltd 2020.

Item Type:	Conference Paper
Publication:	Lecture Notes in Mechanical Engineering
Publisher:	Springer
Additional Information:	The copyright of this article belongs to Springer
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	03 Sep 2020 10:04
Last Modified:	03 Sep 2020 10:04
URI:	http://eprints.iisc.ac.in/id/eprint/66444

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