Showing papers in "Progress in Aerospace Sciences in 2013"

TL;DR: In this article, the area of structural bonded repair of composites is broadly reviewed, starting from damage assessment to automation, to identify current scientific challenges and future opportunities, and the authors propose a robust, reliable and repeatable structural bond repair procedures to restore damaged composite components.

TL;DR: A review of the recent trend of plasma actuator design and to summarise aerodynamic control techniques can be found in this article, where the starting vortex that leads to formation of a plasma wall jet is discussed.

TL;DR: The need for attention directed to the variable stiffness strategy is recognised and the significance of intensive research activities in a highly integrated and multidisciplinary environment emphasised if higher maturity stages of the concepts are to be reached.

TL;DR: In this article, properties and traits of hydrogen with regard to environmental concerns and viability in near future applications are investigated and various strategies are analyzed in order to evaluate hydrogen's feasibility which includes production, storage, engine configurations and aircraft configurations.

TL;DR: In this article, a review of rotor blade tip design technology has been carried out with a view to undertaking subsequent computations to evaluate the performance of new tip designs, with the goal to obtain a better understanding of the helicopter tip design problem.

TL;DR: A high level review of the fan blade environment and current state of structural design to aid further research in developing new and innovative fan blade technologies is presented in this paper. But the review is focused on the performance of fan blades.

TL;DR: In this paper, a review of the development of such approach is introduced in three categories: the low-Reynolds number turbulence models, the correlation-based transition models, and the recently proposed models based on local variables.

TL;DR: In this paper, a detailed account of the different types of water contaminated fuel and the conditions that bring about each form of contamination is given, and a review of studies that have been done to date that investigate the physics behind the behaviour of water in different hydrocarbons and jet fuel at low temperatures.

TL;DR: In this paper, the authors present a review of recent schemes for shock/blast wave attenuation, characterized by the availability of reliable measurements (notably pressure and optical diagnostics) as well as high-resolution numerical simulations.

TL;DR: In this paper, different turbulence modeling techniques are reviewed and compared in terms of their performance in predicting results consistent with the experimental data, and an adaptive approach can be devised by utilizing the information obtained from the resolved field to help assign the value of turbulent Schmidt number in the sub-filter field.

TL;DR: Airframe icing identification based on neural network, batch least-squares algorithm, Kalman filtering, combined NN/KF, and H∞ parameter identification techniques are investigated, and compared with each other.

TL;DR: In this paper, a modular RANS turbulence modelling strategy is proposed and the need for improved measurements with well defined boundary conditions that have Reynolds stress and even spectral information, at Reynolds and Mach numbers that connect with typically powerful turbomachinery systems is identified.

TL;DR: In this article, a complete review of the most recent advances in the field of aerodynamic design and operation of transonic axial flow compressors is given, highlighting the most relevant contribution in this field and to suggest the prospects for future developments.

TL;DR: In this paper, the importance of liquid helium temperature cooling technology in the aerospace field is discussed, and the results indicate that improving the efficiency of Liquid Helium cooling technologies, especially the liquid helium high frequency pulse tube cryocoolers, is the principal difficulty to be solved.

TL;DR: The potential role of distributed propulsion technology in future aviation is investigated in this paper, where features of this specific technology are highlighted in synergy with an electric aircraft concept and a first-of-a-kind comparison to commercial aircraft employing distributed propulsion arrangements.

TL;DR: In this article, the authors discuss the importance of involuntary pilot control actions, generally attributed to biodynamic couplings in predicting aircraft-pilot couplings (A/RPCs) in rotorcraft.

TL;DR: In this paper, the state of the art of integrated vehicle health management (IVHM) tools and how their characteristics match the requirements of legacy aircraft, a summary of problems faced in the past trying to retrofit IVHM tools both from a technical and organisational perspective and the current level of implementation of IVHM in industry.

TL;DR: In this paper, the authors investigated the challenge that U.S. aviation would face in meeting future Greenhouse Gas (GHG) reduction goals to mitigate global climate change via technological options.

TL;DR: In this paper, a survey of atmospheric flow field phenomena models is presented, including wind shear, thermal updrafts, and gusts, which are selected for their potential use toward extended aircraft endurance.

TL;DR: The principle and mechanics of gravity assist and autonomous navigation is summarized, and the survey of autonomous navigation technology in deep space mission is provided and analyzed and can provide reference for development of autonomous Navigation technology for spacecraft using gravity assist.

TL;DR: Theodore von Karman's original two papers on the vortex street, written in German, are presented in the English translation as mentioned in this paper, and they appeared under the same title "Uber den Mechanismus des Widerstandes, den ein bewegter Korper in einer Flussigkeit erfahrt" 14 September and 23 December 1911.

TL;DR: In this paper, the authors give a visual explanation of the mechanism conducive to roll lock-in and catastrophic yaw and relieving means by answering the three questions: Why does the wobbling motion appear?, What is it that makes the wobbled grow to very large amplitudes? and How can catastrophic yAW be prevented?

TL;DR: Theodor von Karman's work as the first director of the Aerodynamisches Institut (Institute of Aerodynamics) of the RWTH Aachen University of Technology from 1913 on and his initiative to re-establish international cooperation after World War I, resulting in the International Union of Theoretical and Applied Mechanics (IUTAM), are commented on in this paper.