Results 51 to 60 of about 395,739 (367)
Forced ignition and oscillating flame propagation in fine ethanol sprays [PDF]
arXiv, 2022 The present work investigates forced ignition and oscillating propagation of spray flame in a mixture of fine ethanol droplets and air. Eulerian-Eulerian method with two-way coupling is used and detailed chemical mechanism is considered. Different droplet diameters and liquid fuel equivalence ratios (ER) are studied.
arxiv
Journal of Manufacturing and Materials ProcessingThe combined use of laser beam and electric arc for welding thick clad steel plates in a single pass has been developed to solve the issues concerning the individual applications of the heat sources, such as the low filling efficiency of conventional ...
Girolamo Costanza +5 more
doaj +1 more source
Journal of Materials Research and Technology, 2021 This paper reports an experimental investigation on continuous CO2 laser cutting of polymethylmethacrylate (PMMA) sheet. The influence of four process factors (laser power, cutting speed, assisting gas pressure and sheet thickness) on five process ...
Ahmed B. Khoshaim +4 more
doaj
Experimental Investigation of Wire EDM Process Parameters on Heat Affected Zone [PDF]
Engineering and Technology Journal, 2018 It is vital to study the impact of heat since it has an unwanted phenomenon on the operating life of parts produced, which is in turn effect the cost of production.
V.N. Najm
doaj +1 more source
Aggregation and Data Driven Identification of Building Thermal Dynamic Model and Unmeasured Disturbance [PDF]
arXiv, 2020 An aggregate model is a single-zone equivalent of a multi-zone building, and is useful for many purposes, including model based control of large heating, ventilation and air conditioning (HVAC) equipment. This paper deals with the problem of simultaneously identifying an aggregate thermal dynamic model and unknown disturbances from input-output data ...
arxiv
High-quality femtosecond laser surface micro/nano-structuring assisted by a thin frost layer [PDF]
arXiv, 2022 Femtosecond laser ablation has been demonstrated to be a versatile tool to produce micro/nanoscale features with high precision and accuracy. However, the use of high laser fluence to increase the ablation efficiency usually results in unwanted effects, such as redeposition of debris, formation of recast layer and heat-affected zone in or around the ...
arxiv
The Galactic Habitable Zone I. Galactic Chemical Evolution [PDF]
Icarus152:185,2001, 2001 We propose the concept of a "Galactic Habitable Zone" (GHZ). Analogous to the Circumstellar Habitable Zone (CHZ), the GHZ is that region in the Milky Way where an Earth-like planet can retain liquid water on its surface and provide a long-term habitat for animal-like aerobic life.
arxiv +1 more source
Metals, 2023 Aluminum alloy is an important material used in railway train structures. It is of great significance to repair aluminum alloy through directional energy deposition to reduce cost and improve the performance of the aluminum alloy.
Jibing Chen +7 more
doaj +1 more source
Metals, 2019 The weldability of additive manufactured Alloy 718 was investigated in various heat-treated conditions. The microstructure of the base metal was examined in detail in order to understand the effect of different pre-weld heat treatments; i.e., solution ...
Raza +5 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Spatial distribution of microstructure in Inconel 718 3D‐printed with bidirectional strategy with no rotation and chessboard strategy is studied. The former results in a highly ordered arrangement of coarse grains separated by line clusters of dislocation‐dense fine grains. This arrangement is disrupted by the chessboard strategy.
Jalal Al‐Lami +4 more
wiley +1 more source