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Analysis for the Application of Hybrid Laminar Flow Control to a Long-Range Subsonic Transport Aircraft
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Abstract
The results of a study that evaluates the application of hybrid laminar flow control (HLFC) to a long-range, twin-engine subsonic transport aircraft are presented. The study was performed using the Flight Optimization System (FLOPS), a rapid and flexible conceptual design and analysis code. This code is a multidisciplinary system of computer programs for conceptual and preliminary design and evaluation of advanced aircraft concepts.
A 300 passenger, twin-engine baseline aircraft was defined for a 6,500 n.mi. design range. All operational and regulatory requirements and constraints, such as fuel reserves, balanced field length and second segment climb are satisfied during the design process. The baseline configuration was sized to account for 50 percent chord laminar flow on the wing upper surface and both surfaces of the horizontal and vertical tails. In addition, the benefits of achieving various amounts of laminar flow on the engine nacelles were also studied. The estimated horsepower extraction, and initial weight and cost increments required for the HLFC system (suction to front spar only) were included in the analysis. Results include comparisons of geometry, weights, fuel burn, cruise lift-to-drag ratio (LVD), and direct operating cost (DOC) for the different configurations. The sensitivity of the results to fuel price and off-design range are also presented.
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Authors
Citation
Arcara, P., Bartlett, D., and McCullers, L., "Analysis for the Application of Hybrid Laminar Flow Control to a Long-Range Subsonic Transport Aircraft," SAE Technical Paper 912113, 1991, https://doi.org/10.4271/912113.Also In
References
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- Applied Aerodynamics Aerospace America Dec. 1990 41
- McCullers, L. A. Aircraft Configuration Optimization Including Optimized Flight Profiles Multidisciplinary Analysis and Optimization - Part 1. NASA CP-2327 1984
- Johnson, V. S. Life Cycle Cost in the Conceptual Design of Subsonic Commercial Aircraft - Volume 1 and 2 Ph.D. Dissertation University of Kansas May 1989
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- Standard Method of Estimating Comparative Direct Operating Costs of Turbine Powered Transport Airlines Air Transport Association of America December 1967