We investigate the effect of pressure on both flame structure and soot formation in nitrogen diluted counterflow diffusion flames ethylene 8–32atm range. Capillary-probe gas sampling is performed to resolve spatially profiles gaseous species up three-ring aromatics by GC/MS analysis multi-color pyrometry used quantify volume fraction dispersion exponent. Self-similarity preserved keeping consta...

Gaseous detectors are widely used in high energy physics, and attractive choices tracking systems for cosmic muon imaging, also called muography. Such offer resolution efficiency at reasonable cost large sizes, however, one of the drawbacks is that gaseous detection medium must be prevented from contamination by outside air or internal outgassing. Standard work with a constant gas flow, leading...

The automation and improved design and performance of Flow Injection Gas Diffusion-Ion Chromatography (FIGD-IC), a novel technique for the simultaneous analysis of trace ammonia (NH(3)) and methylamines (MAs) in aqueous media, is presented. Automated Flow Injection Gas Diffusion (FIGD) promotes the selective transmembrane diffusion of MAs and NH(3) from aqueous sample under strongly alkaline (p...

Non-sooting counterflow diffusion flames have been studied both computationally and experimentally, using either JP-8, or a six-component JP-8 surrogate mixture, or its individual components. The computational study employs a counterflow diffusion flame model, the solution of which is coupled with arc length continuation to examine a wide variety of inlet conditions and to calculate extinction ...

Alternative gaseous fuels, like syn-gas and bio-gas, are attractive fuels for internal combustion engines due to energy and environmental concerns. Although the worldwide use of alternative gaseous fuels has increased, the knock properties of these fuels are not well understood. The methane number (MN) knock rating technique was selected based on its range and sensitivity. Eight alternative gas...

In the present work, we use nuclear magnetic resonance imaging (MRI) to measure mutual diffusion coefficient of methane in toluene at 298 K. The concentration field obtained upon dissolving gaseous liquid was monitored with two-dimensional MRI. To cope low methane, a chemical shift-selective pulse sequence employed. determined from resulting temporally and spatially resolved data based on Fick’...

Abstract The study of scientific and technical materials showed that the existing control systems for technological processes casting with crystallization under pressure are not effective enough. paper presents a system capable real-time measurement, correction main parameters process, such as time nature temperature distribution in tooling casting, rate imposition on crystallizing metal, magni...

Numerical simulations have been carried out for spontaneous ignition of pressurized hydrogen release directly into air. Results showed a possible mechanism for spontaneous ignition due to molecular diffusion. To accurately calculate the molecular transport of species, momentum and energy in a multi-component gaseous mixture, a mixture-averaged multi-component approach was employed in which ther...

In this study, a steady-state model is developed by combining mechanical, Navier–Stokes, Maxwell–Stefan, and Butler–Volmer equations. This then used to investigate the influences of diffusion layer thickness deformation under specific assembly force on porosity distribution as an indicator fuel cell performance. The HT-PEM (high temperature proton exchange membrane) built using COMSOL Multiphys...