Aeronautical engineering: A continuing bibliography with indexes (supplement 278)

This bibliography lists 414 reports, articles, and other documents introduced into the NASA scientific and technical information system in April 1992

Computational and Numerical Simulations

Computational and Numerical Simulations is an edited book including 20 chapters. Book handles the recent research devoted to numerical simulations of physical and engineering systems. It presents both new theories and their applications, showing bridge between theoretical investigations and possibility to apply them by engineers of different branches of science. Numerical simulations play a key role in both theoretical and application oriented research

Proceedings of the Eighth Annual Thermal and Fluids Analysis Workshop: Spacecraft Analysis and Design

This document contains papers presented at the Eighth Annual Thermal and Fluids Analysis Workshop (TFAWS) on Spacecraft Analysis and Design hosted by the NASA/Johnson Space Center (JSC) on September 8-11, 1997, and held at the University of Houston - Clear Lake (UHCL) in the Bayou Building. The Workshop was sponsored by NASA/JSC. Seminars were hosted and technical papers were provided in fluid and thermal dynamics. Seminars were given in GASP, SINDA, SINAPS Plus, TSS, and PHOENICS. Seventeen papers were presented

Aeronautical Engineering: A continuing bibliography with indexes (supplement 182)

This bibliography lists 475 reports, articles and other documents introduced into the NASA scientific and technical information system in December 1984

Aeronautical engineering: A continuing bibliography with indexes (supplement 250)

This bibliography lists 420 reports, articles, and other documents introduced into the NASA scientific and technical information system in February, 1990. Subject coverage includes: design, construction and testing of aircraft and aircraft engines; aircraft components, equipment and systems; ground support systems; and theoretical and applied aspects of aerodynamics and general fluid dynamics

Small-Scale Hydropower and Energy Recovery Interventions: Management, Optimization Processes and Hydraulic Machines Applications

Several topics in the small-scale hydropower sector are of great interest for pursuing the goal of a more sustainable relationship with the environment. The goal of this Special Issue entitled “Small-Scale Hydropower and Energy Recovery Interventions: Management, Optimization Processes and Hydraulic Machines Applications” was to collect the most important contributions from experts in this research field and to arouse interest in the scientific community towards a better understanding of what might be the main key aspects of the future hydropower sector. Indeed, the Guest Editors are confident that the Special Issue will have an important impact on the entire scientific community working in this research field that is currently facing important changes in paradigm to achieve the goal of net-zero emissions in both the energy and water sectors

Additive manufacturing of metal alloy for aerospace by means of Powder Laser Cladding: station tuning and clad characterization

2014 - 2015This thesis investigates the application of continuous coaxial laser cladding by powder injection as repair and cover process. The investigation aimed to check the possibility of repairing a V-groove geometry on a substrate of AA2024 and A357 aluminum alloy. Chapter one is an introduction to the laser cladding. This presents a general overview of the laser cladding methods and some applications for the processes. In the second chapter, the laser cladding process is analysed in terms of process parameters and responses. First of all a basic description of the process is presented with a classification of the technology: laser cladding technology could be carried out in one step and two steps. The feeding deposited material could be powders, wire or paste. Chapter three provides a comprehensive comparison of available lasers, powder feeders, and nozzles to demonstrate their potential and suitability for use in laser cladding technology. It is very important to know the field of application of the different configurations, which depend on the particular condition and use. In chapter four details of the laser cladding station and of the experimental setup used in this research are presented. The last section of this chapter describes the process tuning. In chapter five, the experimental tests and the final analyzes for each experimentation are discussed. The first one is a test of single deposition on a AA2024 aluminum alloy plate carried out in order to understand the alloy characteristics for this process and to analyze the most important responses of the laser cladding process. The effect of the most significant parameters is analysed in terms of main effect and interaction plots by Minitab statistic software. The second one is a about a filling milled grooves through laser cladding for repair applications. In particular a pre-machined V-grooves on AA 2024 aluminum plates has been repaired by the laser cladding process with AA 2024 aluminum powders alloy. In order to analyse the process for another aluminum alloy, the same groove has been milled and filled on A357 aluminum alloy plates. This alloy exhibits a relatively high flowability, which is preferred for Additive Manufacturing processes. It is a precipitation-hardenable A357 alloy, so an analysis pre and post heat treatment is carried out. In conclusion a model to analyse the laser cladding cost is shown. [edited by author]XIV n.s

Aeronautical Engineering: A continuing bibliography with indexes (supplement 205)

This bibliography lists 517 reports, articles and other documents introduced into the NASA scientific and technical information system in September 1986

Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes

 This research developed a novel method for coating carbon nanotubes onto carbon fibre surfaces. It provided valuable guidance for producing various CNT morphologies on fibre surfaces. More importantly, the produced hybrid structures improved interfacial bonding in composites significantly, and this research will explore more potential applications of new generation composites

Aeronautical Engineering: A cumulative index to the 1984 issues of the continuing bibliography

This bibliography is a cumulative index to the abstracts contained in NASA SP-7037(171) through NASA SP-7037(182) of Aeronautical Engineering: A Continuing Bibliography. NASA SP-7037 and its supplements have been compiled through the cooperative efforts of the American Institute of Aeronautics and Astronautics (AIAA) and the National Aeronautics and Space Administration (NASA). This cumulative index includes subject, personal author, corporate source, foreign technology, contract, report number, and accession number indexes