Showing papers in "Progress in Aerospace Sciences in 2011"

TL;DR: A comprehensive review of Uncertainty-Based Multidisciplinary Design Optimization (UMDO) theory and the state of the art in UMDO methods for aerospace vehicles is presented.

TL;DR: In this paper, the role of distributed propulsion technology for future commercial aircraft is highlighted and technological limitations and challenges of this specific technology are also considered in combination with an all electric aircraft concept, as means of predicting the challenges associated with the design process of a next generation commercial aircraft.

TL;DR: In this article, a detailed overview of the current status of the experimental and computational progress over the past twenty years is summarised in this paper, along with a summary of these methods.

TL;DR: In this article, the authors present a survey of the use of spikes for reducing both the drag and the aeroheating by modifying the flowfield ahead of the vehicle's nose.

TL;DR: In this paper, the authors present a comparison between the cost-effectiveness analysis currently used for aviation environmental policy decision-making and an illustrative cost-benefit analysis, and show that different conclusions may be drawn about the same policy options depending on whether benefits and interdependencies are estimated in terms of health and welfare impacts versus changes in NOX emissions inventories.

TL;DR: In this article, a transonic flow theory is reviewed and classical results from the nonlinear asymptotic theory are combined with new results from computational fluid dynamics, and the practical implications of these differences in formulating suitable aerodynamic models for aeroelastic stability calculations are discussed.

TL;DR: In this paper, the authors present a review of the performance of large eddy simulation (LES) for turbomachinery simulations and propose a number of validation data to explore in depth the performance and strategies to refine it.

TL;DR: In this article, a review of the state-of-the-art literature on airship dynamics modeling is presented, aiming to provide a comprehensive description of the main problems in this area and a useful source of references for researchers and engineers interested in modern airship applications.

TL;DR: In this article, the authors give a brief overview of wake vortex research activities such as early studies, integrated programs, model and flight tests, numerical investigations, fundamental physical aspects and alleviation strategies.

TL;DR: In this article, an extensive review of research efforts on erosion in aviation and a basis for comparison between different apparatus simulating rain erosion and their usage within the aerospace industry is provided. And the significant aspects of erosion testing and future prospects for erosion impact are further addressed for forthcoming generations of flying vehicles.

TL;DR: An approach for the generation of aerodynamic tables using computational fluid dynamics is discussed, and a method to efficiently reduce the number of high-fidelity analyses is reviewed, using a kriging-based surrogate model.

TL;DR: In this paper, a review of unsteady flow influences in turbomachinery is presented, and a daunting array of modeling and numerical methods and strategies are found for the user to select.

TL;DR: A design tool based on computational methods for the aero-structural analysis and Multi-Disciplinary Optimization of aircraft layouts at the conceptual design stage, featuring a good compromise between accuracy and costs.

TL;DR: The use of eigenvalue stability analysis of very large dimension aeroelastic numerical models arising from the exploitation of computational fluid dynamics is reviewed and a formulation based on a block reduction of the system Jacobian proves powerful to allow various numerical algorithms to be exploited.

TL;DR: This paper overviews the SimSAC Project, Simulating Aircraft Stability And Control Characteristics for Use in Conceptual Design, and reports on the three major tasks: development of design software, validating the software on benchmark tests and applying the software to design exercises.

TL;DR: In this paper, active flow control of the dielectric barrier discharge actuator for flows around the SD7003 airfoil, with the chord Reynolds number of 6×10 4, was investigated to enhance the understanding of the unsteady aerodynamics.

TL;DR: In this paper, a 3-D supersonic-biplane wing with a tapered-wing planform was designed to reduce the wave-cancellation effect.

TL;DR: In this article, the authors review the flow evolution through intermediate turbine diffusers and discuss the influence of different effects in a systematic way, focusing on different measures for the designer to produce more aggressive diffuser layouts whilst keeping the losses low.

TL;DR: The European Transonic Wind Tunnel (ETW) as discussed by the authors is a transonic wind tunnel that provides transonic testing at high Reynolds numbers in a cryogenic environment, with the main purpose of testing aerodynamic properties.

TL;DR: This paper presents both computational and free flight experimental results to compare and validate the presented SDSA software and shows it to be an excellent tool for predicting dynamic characteristics of an aircraft.

TL;DR: An approach to automation of the process is discussed, involving geometry generation and mesh generation for inviscid as well as RANS flow models.

TL;DR: In this article, the evolution of long range jet transport aircraft over the 50 years since Kuechemann founded the journal Progress in Aerospace Sciences is described, focusing on transonic aerodynamics.

TL;DR: A review of activities in laminar flow control being performed at the Central Aerohydrodynamic Institute named after Prof. N.E. Zhukovsky (TsAGI) can be found in this article.

TL;DR: In this article, the authors compared the performance of linear aerodynamic models with a large panel of tools, from linear aerodynamics (Vortex Lattice Methods) to CFD.

TL;DR: CEASIOM as discussed by the authors is a multidisciplinary software environment for aircraft design that has been developed as part of the European Framework 6 SimSAC project, which allows the user to take an initial design from geometry definition and aerodynamics generation through to full six degrees of freedom simulation and analysis.

TL;DR: This new software suite is shown to allow conceptual development of unconventional novel configurations from mass properties through adaptive-fidelity aerodynamics to linear analysis and control system design.

TL;DR: The CEASIOM software suite is shown to be able to generate excellent quality adaptive-fidelity aerodynamic data that is contained within a full nonlinear aircraft model to which linear analysis and control system design can be easily applied.

TL;DR: In this paper, an experimental system was fitted to a light aircraft to record communication latency, line speed, RF level, packet loss and cell tower identifier and the results showed that the average airborne RF levels are better than those on the ground by 21% and in the order of −77dbm.

TL;DR: In this paper, the authors present a survey of the onboard propulsion systems of the recent lunar orbiters and their key design and performance specifications through trade-off studies, and investigate which lunar mission requirements are critically important, and how they can effect on the overall performance of an onboard propulsion system.

TL;DR: The CEASIOM-SUMO-EDGE software suite as discussed by the authors provides a way from initial sizing to stability and control design and assessment, including effects of aero-elasticity.