Aircraft design with active load alleviation and natural laminar flow
Abstract/Contents
- Abstract
- In this thesis we incorporate maneuver load alleviation (MLA), gust load alleviation (GLA), and natural laminar flow (NLF) into aircraft conceptual design. Existing conceptual design frameworks tend to reduce the impact of these technologies to empirical weight and drag corrections. The present work use physics-based methods to capture the dynamic interplay among natural laminar flow, load alleviation and structure design. The results demonstrate that the simultaneous application of MLA and GLA can tilt the balance of the transonic Mach-sweep-thickness trade in favor of a high aspect ratio, low-sweep natural laminar flow wings. A minimum cost turbulent aircraft designed concurrently with MLA and GLA control systems can a achieve a significant 10% reduction in fuel burn and 3.4% reduction in cost relative to a baseline design without load control. The fuel and cost savings grow to 15% and 5% respectively when we introduce natural laminar flow into the design process. Sensitivity studies confirm that the control and actuator requirements of effective active load alleviation are consistent with the performance parameters of modern aircraft. Comparisons with idealized high-sweep NLF wing further suggest that the combination of active load control and low-sweep NLF wing is a potential alternative to more sophisticated 3-D NLF wing design or complex active laminar flow control (LFC) systems. The aeroservoelastic conceptual design framework developed in this thesis can serve as a platform for assessing future aircraft configurations and operational paradigms aimed at reducing aircraft fuel consumption and environmental impact.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2012 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Xu, Jia |
|---|---|
| Associated with | Stanford University, Department of Aeronautics and Astronautics |
| Primary advisor | Kroo, Ilan |
| Thesis advisor | Kroo, Ilan |
| Thesis advisor | Alonso, Juan José, 1968- |
| Thesis advisor | Jameson, Antony, 1934- |
| Advisor | Alonso, Juan José, 1968- |
| Advisor | Jameson, Antony, 1934- |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Jia Xu. |
|---|---|
| Note | Submitted to the Department of Aeronautics and Astronautics. |
| Thesis | Ph.D. Stanford University 2012 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2012 by Jia Xu
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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