Showing papers in "Progress in Aerospace Sciences in 2015"

TL;DR: In this paper, a review of recent advances in boundary layer interaction research is presented, including low frequency unsteadiness, heat transfer prediction capability, complex (multi-shock boundary layer) interactions and flow control techniques.

TL;DR: An extensive review related to the structural response of the functionally graded materials (FGMs) and structures have been presented in this article, where the emphasis has been made here, to present the structural characteristics of FGMs plates/shells under thermo-electro-mechanical loadings under various boundary and environmental conditions.

TL;DR: An overview on the recent progress in S &A technologies in the sequence of fundamental functions/components of S&A in sensing techniques, decision making, path planning, and path following is presented.

TL;DR: In this article, the authors summarize the status, challenges and progress of implementing acoustic dampers on engine systems and highlight potential, challenges, and issues associated with the dampers practical implementation.

TL;DR: In this article, the authors present an exhaustive overview of the main experimental papers dealing with underexpanded jets, from those where there is clearly a lack of confidence, and some clues are given on the numerical methods that may be used if one wants to study such jets numerically, together with an emphasis on the specific thermodynamic difficulties associated to this kind of extreme conditions.

TL;DR: An overview of the studies on several ice accretion effects on aircraft flight dynamics is presented in this paper, where special attention is paid to the following areas: ways to obtain the aerodynamic data of iced aircraft, flight dynamic modeling and simulation for the aircraft, effects of ice accumulation on aircraft stability and control as well as on flight performance and aircraft icing envelope protection and control adaption.

TL;DR: In this article, the impact of an increasing degree-of-Hybridization for Useful Power (HP,USE) on the overall sizing, performance and flight technique optimization of fuel-battery hybrid-electric aircraft is addressed.

TL;DR: In this paper, the authors review the current knowledge of the mechanics of cavity-based flameholding in supersonic flows and discuss the non-reacting and reacting cavity flowfield with particular emphasis on the impact of fuel injection location relative to the flameholder.

TL;DR: A set of positions are presented on turbulence modeling for the Reynolds-Averaged Navier Stokes (RANS) equations, and a series of fallacies are explained, many of them widely held and by senior observers, in turbulence knowledge, leading to turbulence models.

TL;DR: In this article, the authors classified the current partially-featured AquaUAV into three categories from the scope of the whole UAV field, i.e., the seaplane UAV, the submarine-launched UAV and the submersible UAV.

TL;DR: For more than half a century, researchers have been aware that freestream fluctuations have an important effect on laminar-turbulent transition, and a century of effort has also been devoted to the development of theory and experiment for the instability mechanisms that lead to transition, in order to develop more reliable prediction methods as mentioned in this paper.

TL;DR: In this article, the effect of micro-vortex generators (MVGs) on SBLIs has been reviewed, with emphasis on the strength and decay of the streamwise vortices and on the ring-type or hairpin vortice which have been detected in the instantaneous flow around the wake.

TL;DR: Low-power sensors and wireless communication components are used in newer SHM systems, and a number of researchers have recently investigated such techniques to extract energy from the local environment to power these stand-alone systems.

TL;DR: The rotor vortex theory of Joukowsky is discussed in this article, with the main focus on wind turbine rotors, but much of the basic theory applies to propellers and helicopters as well.

TL;DR: The programmatic context and considerations that have shaped the development and execution of a number of research initiatives implemented by the Air Force Office of Scientific Research Aerothermodynamics and Turbulence portfolio since 2001 are discussed in this paper.

TL;DR: A review of the current state of technological development in the field of electrical micropropulsion can be found in this article, where the essential mechanism of operation of each electrical micro-propulsion system is described and recent progress in the development of these systems is explored, giving latest available data of their performance parameters.

TL;DR: In this paper, an analytical review of the current state of the investigations and development trends on the problem of turbulent friction and aerodynamic drag reduction in simple model configurations, which is among key ones in modern aeromechanics.

TL;DR: In this paper, the authors present high-order gas-kinetic unified algorithms (GKUAs) for rarefied gas flow computations in phase space, which combine the discrete velocity ordinate method in velocity space and the compact highorder finite-difference schemes in physical space.

TL;DR: In this paper, the history of rotor aerodynamics with special emphasis on the role of Joukowsky is discussed, focusing on the development of the momentum theory and vortex theory for rotors.

TL;DR: In this paper, the Vibration Correlation Technique (VCT) was applied to stringer stiffened curved panels manufactured both from aluminum and laminated composite material to investigate the modal behavior of the panels.

TL;DR: In this paper, the authors present a comprehensive literature review on thermal issues of stratospheric airships, including solar radiation models, environmental longwave radiation models and external convective heat transfer.

TL;DR: In this paper, the role of education and training in the aerospace sector for establishing sufficient levels of absorptive capacity in newly industrialized countries is substantial and forms a fundamental part of a nation's ability to establish and cultivate absorptive capacities on a national or organization-specific level.

TL;DR: The direct simulation Monte Carlo method (DSMC) has evolved over 50 years into a powerful numerical technique for the computation of thermochemical nonequilibrium gas flows as mentioned in this paper, in which velocity and internal energy distribution functions are not in equilibrium forms due to a low number of intermolecular collisions.

TL;DR: The results of an experimental investigation performed at the Politecnico di Milano inside the European project DAEDALOS on three composite cylindrical shells are presented in this paper.

TL;DR: A comprehensive overview of metrics used for the uncertainty quantification of cost estimates based on a literature review, an evaluation of publicly funded projects such as part of the CORDIS or Horizon 2020 programs, and an analysis of established approaches used by organizations such NASA, the U.S. Department of Defence, the ESA, and various commercial companies are provided.

TL;DR: A comprehensive review examines the efforts of previous researchers to develop concepts for propellant-collecting spacecraft, estimate the performance of these systems, and understand the physics involved as mentioned in this paper, and outlines five areas for continued research These areas include air compatible cathode technology, techniques to improve propellant utilization on atmospheric species, in-space compressor and liquefaction technology, improved hypersonic and hyperthermal free molecular flow inlet designs, and improved understanding of how design parameters affect system performance.

TL;DR: In this article, the underlying principles and technologies enabling the design and operation of airborne laser sensors are introduced and a detailed review of state-of-the-art avionic systems for civil and military applications is presented.

TL;DR: In this article, the authors proposed new methodologies for precluding adverse A/RPC events taking into account the aeroelasticity of the structure and pilot biodynamic interaction.

TL;DR: In this article, the first 60 years of the Air Force Office of Scientific Research were celebrated and several studies of hypersonic flows dominated by rate-dependent energetic processes are revisited.