Thermal Flux
Mostrando 1-12 de 87 artigos, teses e dissertações.
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1. Studies on Heat Flux Imparted on Thermal Insulation Inside Rocket Motor Containing Double Base Propellant
ABSTRACT Thermal insulation inside the rocket motor experience severe pressure and temperature conditions. Experimental determination of heat flux imparted to thermal insulator inside the rocket motor during the static firing is a challenging task. This paper reports experimental determination of heat flux for double base propellant (DBP) in small rocket mot
J. Aerosp. Technol. Manag.. Publicado em: 10/07/2019
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2. Performance of the INCONEL 625 alloy weld overlay obtained by FCAW process
ABSTRACT Nickel-based weld overlays (cladding) are commonly used in oil & gas industry to extend the life of equipment under corrosive environment, as it improves the corrosion resistance without a significant increase in the manufacturing cost, when compared to a full nickel-based alloy equipment. Although there are extensive literature involving overlays a
Matéria (Rio J.). Publicado em: 20/05/2019
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3. Rolling Contact Fatigue Life of Rail for Different Slip Conditions
Abstract A three-dimensional elastic-plastic finite element analysis (FEA) is carried out to estimate the rolling contact fatigue (RCF) crack initiation life for varied slip range on the rail arising from operational variations. The wheel load produces Hertzian contact pressure. Variation in engine traction induces slip variations that evolves thermal load i
Lat. Am. j. solids struct.. Publicado em: 2017-12
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4. Analysis of reverse heat transfer for conventional and optimized lubri-cooling methods during tangential surface grinding of ABNT 1020 steel
Abstract A numerical thermal model was developed to evaluate the heat flux which is conducted to a rectangular workpiece of steel plate ABNT 1020, thus making it possible to compute the maximum temperature in the grinding surface, taking into account the rectangular distribution of heat flux, the thermal properties of the grinding wheel conventional Al2O3, t
REM, Int. Eng. J.. Publicado em: 2016-12
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5. Influence of Heat Treatment in Residual Stresses Generated in P91 Steel-pipe Weld
The knowledge of residual stress arising from the welding processes is extremely important because the mechanical properties of the welded components are not only determined by the microstructures present in the joint, but also by the heterogeneous residual stresses introduced during the thermal cycle in welding processes. The aim of this work is the charact
Mat. Res.. Publicado em: 2015-06
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6. Effect of the Fiber Orientation Relatively to the Plasma Flow Direction in the Ablation Process of a Carbon-Phenolic Composite
ABSTRACT: Composite materials are vastly employed in rocket nozzle extensions and as thermal protection shields in aerospace industry. In both cases, ablative and thermal properties play an important role for material choice and equipment sizing. These properties are strongly dependent on the way the pieces are manufactured. For the case of nozzle extensions
J. Aerosp. Technol. Manag.. Publicado em: 2015-03
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7. NOVEL SIMILARITY-SOLUTION WHICH IS APPLICABLE FOR FREE CONVECTION OVER A BODY OF ARBITRARY SHAPE: THERMAL NON-EQUILIBRIUM IN A POROUS MEDIUM
Abstract The study of the natural convection flow and heat transfer from hot surfaces in a porous medium has been of considerable interest in energy-related engineering problems. This paper is concerned with the free convection heat transfer over an arbitrary hot surface in a porous medium. It is assumed that the fluid and solid phases are not in local therm
Braz. J. Chem. Eng.. Publicado em: 2015-03
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8. A model for evaluation of effective thermal conductivity of periodic composites with poorly conducting interfaces
This paper presents a new micromechanical extension of the parametric finite-volume theory for evaluation of effective thermal conductivities of periodic unidirectional fiber reinforced composites. Such materials are assumed as composed of repeating unit cells with arbitrary internal architectural arrangements of fiber coated by thin interphase with low ther
Mat. Res.. Publicado em: 11/11/2014
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9. CFD and experimental investigation on the heat transfer characteristics of alumina nanofluids under the laminar flow regime
This study reports experimental and Computational Fluid Dynamics (CFD) investigations of the laminar convective heat transfer coefficient of Al2O3/water nanofluids in a circular tube under uniform and constant heat flux on the wall. Three different models including a constant physical properties single-phase (CP-SP) model, a variable physical properties sing
Braz. J. Chem. Eng.. Publicado em: 2014-06
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10. Incorporação de resíduos de placas de circuitos impressos (RPCI) em massas cerâmicas triaxiais utilizando experimentos com misturas / Incorporation of waste printed circuit boards (WPCB) in triaxial ceramic bodies using experiments with mixtures
The aim of this work is evaluate the effect of incorporation of waste printed circuit boards (WPCB) in physical and mechanical properties of triaxial ceramics for coating. Through the technique of experiment with mixtures seven formulations were developed with clay (40, 53, 60 e 80%); phyllite (20, 33, 40 e 60%) and waste (0, 14, 20 e 40%). The WPCB was char
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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11. Cachaça distillation investigated on the basis of model systems
This work reports experimental tests using commercial spirits that were diluted and had their initial composition modified in order to better measure the distillation behavior of selected minor compounds of importance for the quality of alcoholic beverages. Such compounds were added to the commercial cachaça and the corresponding model wine, obtained after
Brazilian Journal of Chemical Engineering. Publicado em: 2012-06
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12. Pyroelectric composite film for X-ray intensity detection
Composite material obtained with modified lead titanate (Pz34) ferroelectric ceramic and polyether-ether-ketone (PEEK) polymer matrix was used as sensitive component to measure X-ray intensity in a novel detection system. The sensing element works as a thermal transducer, converting a non-quantified thermal flux into an output measurable quantity of electric
Materials Research. Publicado em: 15/03/2012