Showing papers in "Progress in Aerospace Sciences in 2004"

TL;DR: In this paper, the authors review the development of new reduced-order modeling techniques and discuss their applicability to various problems in computational physics, including aerodynamic and aeroelastic behaviors of two-dimensional and three-dimensional geometries.

TL;DR: A hierarchy of computational approaches that range from semi-empirical schemes that estimate the noise sources using mean-flow and turbulence statistics, to high-fidelity unsteady flow simulations that resolve the sound generation process by direct application of the fundamental conservation principles is discussed in this paper.

TL;DR: In this paper, the authors reviewed the literature for transition on circular cones and scramjet forebodies from an experimental point of view, focusing on the effect of laminar-turbulent transition in hypersonic boundary layers.

TL;DR: In this article, the authors provide a perspective on the current status and future directions for active flow control technology with particular emphasis on oscillatory control, and make recommendations relevant to numerical complications on the route to design oscillatory flow-control systems.

TL;DR: The cost definitions are reviewed in the context of the nature of cost as applicable to the engineering process stages: from bidding through to design, to manufacture, to procurement and ultimately, to operation.

TL;DR: In this paper, the authors review the recent advancements in the field of fluid-structure interaction, with specific attention to aeroelastic applications, and highlight the state-of-the-art computational and modeling issues.

TL;DR: In this article, the effects of spanwise distribution on the aircraft aerodynamic efficiency were studied through an inverse twist design approach, combining both a low fidelity panel method and a high-fidelity Reynolds-averaged Navier-Stokes solution method.

TL;DR: In this article, transient thermal non-destructive testing (NDT) is used for assessing aircraft composites, which can be used for both reducing manufacturing costs and out-ofservice time of aircraft due to maintenance.

TL;DR: In this article, the authors present a review of the propulsion and power concepts that are under development at the National Aeronautics and Space Administration's (NASA) John H. Glenn Research Center at Lewis Field, Cleveland, Ohio, USA.

TL;DR: A review of computational fluid dynamics for aerodynamic application has been performed to highlight the outstanding achievements by pioneers of this discipline as mentioned in this paper.It is an ardent hope that this abridged literature review will aid to reaffirm excellence in research and to identify knowledge shortfalls both in fluid dynamics and its modeling and simulation capability.

TL;DR: In this paper, a new technology for reducing turbulent skin friction, called the microblowing technique (MBT), is presented, which can potentially reduce more than 50% of the skin friction of a solid flat plate for subsonic and supersonic flow conditions.

TL;DR: In this article, the authors review the material that contributes to our understanding of unsteady phenomena over slender bodies at incidence, and find that the material disjoint, making it difficult to draw general conclusions.

TL;DR: In this article, the interaction of main rotor vortices with the helicopter tail rotor is considered and, in particular, the limiting case of the orthogonal interaction is considered, and the basic phenomenon is described before experimental studies of the interaction are presented.

TL;DR: The key features of the VL include an intuitive, web-based user interface for ease of access, a secure high-speed Internet connection between browser and server, a relational database architecture for data and information search, and a secure file-storage system.

TL;DR: In this paper, the concept of adaptive slotted test sections is presented as a new promising alternative to the known technology of adaptive wall test sections, i.e., slots in solid walls with flexible, adjustable liners to enable controlled flow in the vicinity of the walls.

TL;DR: The abrupt wing stall (AWS) program was a 5-year program that addressed the problem of uncommanded, transonic lateral motions, such as wing drop, with experimental, computational, and simulation tools as mentioned in this paper.