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Open AccessArticle

Preliminary Design and System Considerations for an Active Hybrid Laminar Flow Control System

German Aerospace Center (DLR), Lilienthalplatz 7, 38108 Braunschweig, Germany
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Aerospace 2019, 6(10), 109; https://doi.org/10.3390/aerospace6100109
Received: 13 September 2019 / Revised: 25 September 2019 / Accepted: 26 September 2019 / Published: 1 October 2019
(This article belongs to the Special Issue Aeronautical Systems for Flow Control)
Hybrid laminar flow control or HLFC design is a complex and multi-disciplinary process, which demands a thorough understanding of all aspects from a global systems viewpoint. The objective of the paper is to present a preliminary design of important components of an HLFC system that helps in quick assessment of conceptual system architectures. This is important to evaluate feasibility, system performance, and overall aircraft benefits at early stages of system development. This paper also discusses the various important system requirements and issues concerning the design of active HLFC systems, and the interfaces between various disciplines are presented. It can be emphasized from the study that the future compressor design for the HLFC system should consider the thermal management aspects and additional mass flow requirements from the aerodynamics-structure design optimization and also from water drain system solutions. A method to calculate the accumulated water content inside the plenum chambers is presented, and the effect of a drain hole on the power consumption is studied. A low order thermal management study of the HLFC compressor motor shows a high temperature rise in the windings for very high speed motors for long duration operation and calls for effective cooling solutions. View Full-Text
Keywords: hybrid laminar flow control; suction system; preliminary design; compressor; system requirements hybrid laminar flow control; suction system; preliminary design; compressor; system requirements
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Kalarikovilagam Srinivasan, G.; Bertram, O. Preliminary Design and System Considerations for an Active Hybrid Laminar Flow Control System. Aerospace 2019, 6, 109.

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