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A Zonal Calculation Method for Axial Gas Turbine Diffusers
Volume 6B: Turbomachinery, 2013The axial exhaust downstream of a gas turbine in a combined cycle plant includes an annular diffuser with struts and a closed hub carrying the turbine rotor bearing. Flow separation occurs at the blunt end of the hub and can also occur on the casing wall and on the struts. A zonal method for the computation of the flow in such diffusers is described. A
A. Hirschmann, M. Casey, M. Montgomery
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Gas-Kinetic Finite Volume Methods, Flux-Vector Splitting, and Artificial Diffusion
Journal of Computational Physics, 1995The authors found that the gas-kinetic discretization can be explained in terms of standard central difference and upwind schemes. Artificial viscosity concepts are reviewed and linked to the grid size and to the physical length scale of the discontinuity.
Xu, Kun +2 more
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Optimized methods for diffusive greenhouse gas flux analyses in inland waters
Environmental Science and Pollution Research, 2019Inland waters are considered hotspots of greenhouse gas (GHG) emissions and have been extensively researched. Static chamber (STAT) and thin boundary layer (BLE) are two commonly used methods for analyzing diffusive GHG emissions from inland waters. However, the STAT method is often disturbed by GHG bubbles; meanwhile, many kinds of headspace gas are ...
Lin, Zhu +6 more
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Diffusion Niobizing of Titanium Grade 2 by Gas-Contact Method
Key Engineering Materials, 2015The work presents results of diffusion niobizing of titanium Grade 2 by gas-contact method. Microhardness, thickness, chemical composition and microstructure were investigation. Diffusion processes was carried out in a two powder mixture. First consisted of ferro-niobium, kaolin and ammonium chloride, second mixture contained pure niobium instead ferro-
Dariusz Bartkowski +5 more
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Measurements of diffusion coefficients by the method of gas chromatography
Journal of Chromatography A, 1972Abstract Experimental diffusivities have been obtained for several gas-gas, gas-liquid vapor and gas-solid vapor systems, using the method of gas chromatography. On the basis of the experimental results, a generalized semi-empirical equation has been developed to predict the diffusivity of binary systems as a function of pressure and temperature.
Ting-Chia Huang +3 more
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Further Development and Studies of Gas Methods in Matrix Diffusion
MRS Proceedings, 1993ABSTRACTThe present status of the recently introduced gas method equipment for migration studies of fractured and porous media is briefly reviewed together with advances in the experimental techniques. The conditions under which matrix diffusion can be observed in both gas flow and water flow experiments are discussed in some detail.
Kari Hartikainen +3 more
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Application of the diffusion method for preparing test gas mixtures
Measurement Techniques, 19681. Diffusion dispensers can be used in producing testing instruments for obtaining given vapor concentrations in air. It is advantageous to use a dispenser with a porous membrane, thus making it possible to cover the entire range of concentrations required for testing working instruments.
D. K. Kollerov, K. D. Mgaloblishvili
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Interferometric method for the determination of binary gas mass diffusivities
Review of Scientific Instruments, 1977A new method has been developed for measurement of the mass diffusivity of gas pairs. The method utilizes fringe shift data produced by a differential interferometer. A test cell was constructed that modeled the transient one-dimensional evaporation of volatile liquids into stagnant air.
W. Z. Black, R. L. Somers
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A field method for measurement of gas diffusion into soils
Australian Journal of Soil Research, 1964A transient method for field measurement of gas diffusion into soil is presented. The theory of the method and the results of preliminary tests are given. Diffusion takes place from a reservoir mounted on a tube driven into the soil. The theoretical analysis is used in the design of the experimental method, the relative importance of the various ...
DS McIntyre, JR Philip
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Development of low-diffusion flux-splitting methods for dense gas–solid flows
Journal of Computational Physics, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mao, Deming +3 more
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