Injector
Mostrando 1-12 de 68 artigos, teses e dissertações.
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1. 3D numerical investigation of mixture formation and combustion in a DISI engine at part-load under stratified operation
This work investigates through numerical simulation, the operation of a big bore direct fuel injection spark ignition engine, at part load under stratified operation. It evaluates fuel-air mixture preparation and combustion process with the adoption of detailed chemical kinetics mechanisms for both Isooctane and Ethanol, and applying adaptive mesh refinement
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2020
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2. Characterization of venturi injector using dimensional analysis
RESUMO Injetores Venturi são comumente empregados para fins de fertirrigação na agricultura, extraindo fertilizante de um tanque para a linha de irrigação. O conhecimento da quantidade de líquido a ser injetado por este dispositivo é útil para assegurar operação e manejo adequados da fertirrigação. Os objetivos desta pesquisa foram: (1) conduzir
Rev. bras. eng. agríc. ambient.. Publicado em: 10/07/2019
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3. Determination of methanol residues in crude glycerol for animal feed by gas chromatography
ABSTRACT: Crude glycerol is a major by-product of biodiesel production and is an economical additive feed for ruminants. However, residual methanol in crude glycerol can be harmful to animal health. Several methods exist for quantifying methanol residues in biodiesel, yet few have been described that identify the methanol level in crude glycerol. We propose
Sci. agric. (Piracicaba, Braz.). Publicado em: 30/05/2019
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4. Mimicking Ketonuria in the Ketogenesis Defect 3-Hydroxy-3-MethylglutarylCoenzyme A Lyase Deficiency: An Artefact in the Analysis of Urinary Organic Acids
Abstract 3-Hydroxy-3-methylglutaryl-coenzyme A lyase (HMGCL, HMGCL) deficiency is a rare inborn error of ketogenesis. Even if the ketogenic enzyme is fully disrupted, an elevated signal for the ketone body acetoacetic acid is a frequent observation in the analysis of urinary organic acids, at least if derivatization is performed by methylation. We provide an
J. inborn errors metab. screen.. Publicado em: 28/02/2019
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5. Simultaneous determination of candesartan and hydrochlorothiazide in human plasma by LC-MS/MS
Abstract A simple, sensitive, rapid and highly efficient LC-MS/MS method was developed for the determination of Candesartan and Hydrochlorothiazide simultaneously in human plasma. The method employed Zorbax eclipse C18 (150 X 4.6 mm, 5µ) column using acetate buffer: acetonitrile (25:75%, v/v) as the mobile phase. The mobile phase flow rate is 1 mL/min which
Braz. J. Pharm. Sci.. Publicado em: 07/06/2018
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6. Characterization and selection method of Venturi injectors for pressurized irrigation
ABSTRACT Venturi-type chemigation injectors are widely used due to their advantages: they do not require electric power and are cheap to operate. However, they also generate considerable energy losses which affect the pressure in the system. The correct characterization of these systems requires pressures to be correctly set at the inlet, injector and outlet
Rev. Ciênc. Agron.. Publicado em: 2018-06
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7. Swirl Injection Effects on Hybrid Rocket Motors
ABSTRACT: In the last decades, hybrid rocket engines have been increasingly studied and used in space vehicles. However, the low regression rates and specific impulses still represent major drawbacks to this technology. The objective of this study was to quantify the relative improvement of regression rate values with the use of a swirling flow injector in c
J. Aerosp. Technol. Manag.. Publicado em: 2015-12
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8. Mechanical Properties Analysis of Polypropylene Biocomposites Reinforced with Curaua Fiber
Over the last few years, great interest has been shown by researchers in presenting alternative proposals for the design and fabrication of materials with good mechanical properties and low cost for a variety of applications. With this in mind, a study was carried out on the addition of curaua fibers in a polypropylene (PP) matrix. These were extruded in the
Mat. Res.. Publicado em: 2015-08
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9. Diseño y alternativas en la instalación de inyectores Venturi en riego localizado1
The performance and installation alternatives of four Venturi injector prototypes were studied at Universitat Politècnica de València, Valencia, Spain (39°29' N; 0°23' W; 20 m). This device performance was studied under several parameters such as head loss, relation of flows and injection efficiency. The installation configurations analyzed were: without
Rev. Ciênc. Agron.. Publicado em: 2015-06
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10. Diseño y predicción del funcionamiento de inyectores Venturi en riego localizado
The design and prediction performance of four Venturi injector prototypes have been studied using Computational Fluid Dynamics (CFD) techniques. Results were compared with experimental tests carried out in the laboratory of the Universitat Politècnica de València, Valencia, Spain. The analysed and selected geometries for each prototype were used to simulat
Rev. bras. eng. agríc. ambient.. Publicado em: 2014-12
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11. Micro and nanometric wear evaluation of metal discs used on determination of biodiesel fuel lubricity
The contact of diesel fuel with engine subsystems demands a good wear resistance. Lubricity is an important feature for integrity of injection system and the sulphur composites are primarily responsible for lubrication of the injector nozzle. Biodiesel is responsible for partially restoring the lubricity of diesel fuel that presents low levels of sulphur com
Mat. Res.. Publicado em: 04/07/2014
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12. Gonadotropin therapy in assisted reproduction: an evolutionary perspective from biologics to biotech
Gonadotropin therapy plays an integral role in ovarian stimulation for infertility treatments. Efforts have been made over the last century to improve gonadotropin preparations. Undoubtedly, current gonadotropins have better quality and safety profiles as well as clinical efficacy than earlier ones. A major achievement has been introducing recombinant techno
Clinics. Publicado em: 2014-04