Showing papers in "Progress in Aerospace Sciences in 2012"

TL;DR: Gamma titanium aluminides display attractive properties for high temperature applications as discussed by the authors, including microstructure, deformation mechanisms, and alloy development, which has led to the production of gamma-titanium aluminide sheets.

TL;DR: The Unsteady Vortex-Lattice Method (UVM) as mentioned in this paper provides a medium-fidelity tool for the prediction of non-stationary aerodynamic loads in low-speed, but high-Reynolds-number, attached flow conditions.

TL;DR: A critical review of both experimental and computational studies of round turbulent jets is provided, beginning with the work of Tollmien (1926). as discussed by the authors traces the history, major advances, and various stages that the research community went through over the past 85-odd years, from statistical analyses through to the use of conditional sampling, proper orthogonal decomposition and structural eduction methods.

TL;DR: A review of the application of the Magnus effect devices and concepts in aeronautics can be found in this article, where the authors conclude that future challenges in their application are discussed.

TL;DR: An overview of the various analyses of flight dynamics, stability, and control of flapping wing micro-air vehicles available in the literature can be found in this paper, where the authors present an overview of their work.

TL;DR: In this paper, the authors present a review of existing and current developments and the analysis of hybrid-electric propulsion systems (HEPS) for small fixed-wing Unmanned Aerial Vehicles (UAVs).

TL;DR: In this paper, the authors discuss some trends and recent advances in model-based Fault Detection, Isolation and Recovery (FDIR) for aerospace systems and underline the reasons for a widening gap between the advanced scientific FDIR methods being developed by the academic community and technological solutions demanded by the aerospace industry.

TL;DR: In this article, the capability of Computational Fluid Dynamics (CFD) software to accurately predict hypersonic shock wave laminar boundary layer interactions is examined and a series of independent computations performed by researchers in the US and Europe are presented for two generic configurations (double cone and cylinder) and compared with experimental data.

TL;DR: A review of the state-of-the-art of microvortex generators and their effect on separated shock/boundary-layer interactions is provided in this paper, where the flowfield around and behind an MVG is discussed, paying attention on the major and minor vortical features.

TL;DR: This review provides a comprehensive and systematic summary of photogrammetric techniques for aerospace applications based on diverse sources and gives a general introduction forphotogrammetrists and computer vision scientists to new applications.

TL;DR: In this paper, the authors used time-marching methods to analyze the flow inside a cavity exposed to a high-speed flow and the flow around a helicopter landing on a ship.

TL;DR: A detailed review of physic-based hypersonic flow simulation can be found in this article, where the critical basic research areas are summarized and delineated through an assessment of all the most recent advancements in nonequilibrium modeling of chemical kinetics, chemical-physics kinetics and ablation, radiative exchange.

TL;DR: The aim of the paper is to establish a baseline for development of a non-commercial, low cost, transparent cost estimation methodology to be applied during very early program research phases at a complete vehicle system level, for largely unprecedented manned launch vehicles in the future.

TL;DR: A review of currently deployed technological responses and those currently under development to runway incursions, including results of currently developed runway incursion prevention systems and the performance of the systems.

TL;DR: In this article, a series of simulations performed on compressor geometries, ranging from a Controlled Diffusion Cascade stator blade to the periodic sector of a stage in a 3.5 stage axial compressor, were presented.

TL;DR: In this article, the compressible Navier-Stokes equations are solved for turbulent spots in otherwise laminar boundary layers with external flow Mach numbers of 3 and 6 in each case two wall temperature conditions are simulated, one corresponding to an adiabatic wall and the other to a cooled wall where the wall temperature is equal to the free stream temperature.

TL;DR: In this paper, an assessment of the current state-of-the-art in the experimental characterization and numerical simulation of catalysis on high-temperature material surfaces has been conducted under the auspices of the NATO Research and Technology Organisation Applied Vehicle Technologies Panel Task Group AVT-136.

TL;DR: In this paper, the aerothermodynamic phenomena of blunt body entry vehicles are discussed, including turbulent flow, non-equilibrium flow, rarefied flow, and radiation transport.

TL;DR: In this article, the authors revisited a largely forgotten derivation of velocity slip and temperature jump by Patterson, based on Grad's moment method, for simulation of rarefied hypersonic flows.

TL;DR: In this paper, the use of CFD methods for aircraft flight dynamics applications is discussed, and three test cases are discussed in the paper, namely, the Standard Dynamic Model, the Ranger 2000 jet trainer and the Stability and Control Unmanned Combat Air Vehicle.

TL;DR: In this article, the authors used large-eddy simulation (LES) type methods to study complex and realistic geometry single stream and co-flow nozzle jets and acoustics, including the serrated (chevron) nozzle, realistic co-axial nozzles with eccentricity, pylon and wing-flap.

TL;DR: In this paper, large-eddy simulations were carried out for a turbine rim seal and the sensitivity of the results to changes in grid resolution and the size of the computational domain are investigated.

TL;DR: An introduction and overview to the efforts of NATO Research and Technology Organization Task Group AVT-136, Assessment of Aerothermodynamic Flight Prediction Tools through Ground and Flight Experimentation is provided.

TL;DR: In this paper, the predictive capabilities of afterbody flow fields of re-entry vehicles investigated in the frame of the NATO/RTO-RTG-043 task group are investigated.

TL;DR: In this paper, the authors give information about the emerging technologies in the design of communication satellites' transceiver subsystem and demonstrate the feasibility of using fiber optic links for the local oscillator distribution in future satellite payloads together with the optical inter-satellite link.

TL;DR: The first wing fabricated out of a corrugated aluminum sheet mounted at the tail of the braced-steel-pipe fuselage to earn its airworthiness in Berlin Johannisthal in 1912 is described in this article.

TL;DR: This special issue describes some of the work done in this area within the UK Applied Aerodynamics Consortium, which brings together many of the UK's leading research groups together with a strong involvement from the aerospace industry.