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  • 1
    Electronic Resource
    Electronic Resource
    The large path length limit for infrared gaseous radiation (1968)
    Springer
    Flow, turbulence and combustion 19 (1968), S. 439-449 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The large path length limit is investigated for infrared gaseous radiation. This limit differs considerably, as the result of the wing regions of vibrationrotation bands, from the conventional Rosseland limit. For illustrative purposes, results are presented for a gas bounded by two parallel black plates and within which there is a uniform heat source. In order to demonstrate its range of applicability, the large path length limit is compared with numerical solutions for CO, CO2, H2O, and CH4. It is further shown that a gas such as CO2 is a very poor transmitter of radiant energy, relative to other absorbing-emitting gases, in the large path length limit, although just the opposite is true under optically thin conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00383938
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  • 2
    Electronic Resource
    Electronic Resource
    The interaction of thermal conduction and infrared gaseous radiation (1969)
    Springer
    Flow, turbulence and combustion 20 (1969), S. 25-39 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The present investigation is concerned with energy transfer in gases which transmit heat by the combined mechanisms of molecular conduction and infrared radiation. For illustrative purposes an analysis is presented for a gas bounded by two parallel black plates and within which there is a uniform heat source. Radiation-conduction interaction parameters, appropriate to both the optically thin and large path length limits, are presented for a number of gases. Numerical solutions for the gas centerline temperature have been obtained for CO, CO2, H2O, and CH4, and these are compared with limiting solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382380
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  • 3
    Electronic Resource
    Electronic Resource
    Radiation interactions in transient energy transfer in fully developed laminar flows (1990)
    Springer
    Flow, turbulence and combustion 47 (1990), S. 151-176 
    Details
    ISSN: 1573-1987
    Keywords: Transient Radiation ; Radiative Interaction in Laminar Flows ; Nongray Radiation in Gaseous Mixture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Analysis and numerical procedures are presented to investigate the transient radiative interactions of nongray absorbing-emitting species in laminar fully-developed flows between two parallel black plates. The particular species considered are OH, CO, CO2, and H2O and different mixtures of these species. Transient and steady-state results are obtained for the temperature distribution and bulk temperature for different plate spacings, wall temperatures, and pressures. Results, in general, indicate that the rate of radiative heating can be quite high during earlier times. This information is useful in designing thermal protection systems for transient operations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382009
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  • 4
    Electronic Resource
    Electronic Resource
    Investigation of chemically reacting and radiating supersonic flow in channels (1993)
    Springer
    Flow, turbulence and combustion 50 (1993), S. 43-68 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The two-dimensional time dependent Navier-Stokes equations are used to investigate supersonic flows undergoing finite rate chemical reaction and radiation interaction for a hydrogen-air system. The explicit multi-stage finite volume technique of Jameson is used to advance the governing equations in time until convergence is achieved. The chemistry source term in the species equation is treated implicitly to alleviate the stiffness associated with fast reactions. The multidimensional radiative transfer equations for a nongray model are provided for general configuration, and then reduced for a planar geometry. Both pseudo-gray and nongray models are used to represent the absorption-emission characteristics of the participating species. The supersonic inviscid and viscous, nonreacting flows are solved by employing the finite volume technique of Jameson and the unsplit finite difference scheme of MacCormack to determine a convenient numerical procedure for the present study. The specific problem considered is of the flow in a channel with a 10° compression-expansion ramp. The calculated results are compared with the results of an upwind scheme and no significant differences are noted. The problem of chemically reacting and radiating flows are solved for the flow of premixed hydrogen-air through a channel with parallel boundaries, and a channel with a compression corner. Results obtained for specific conditions indicate that the radiative interaction can have a significant influence on the entire flowfield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01086452
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  • 5
    Electronic Resource
    Electronic Resource
    High temperature interfacial studies in aluminium-stainless steel composites (1987)
    Springer
    Journal of materials science 22 (1987), S. 2680-2684 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Interfacial shear strengths in single wire aluminium-stainless steel composites have been measured by the pull-out test, both at room temperature and high temperatures, as a function of annealing temperatures up to 823 K and times up to 24 h. The post-exposure interfacial shear strengths measured at room temperature have been found to be inversely proportional to the square root of the interfacial compound layer thickness. A tentative mechanism to explain this relationship has been proposed in terms of matrix-compound layer debonding. The growth of the compound layer during high-temperature exposure is accompanied by an increase in its microhardness, presumably resulting from a concurrent precipitation of intermetallics. The interfacial shear strength has been found to be independent of stainless steel wire diameter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01086456
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  • 6
    Electronic Resource
    Electronic Resource
    Pore formation in cast metals and alloys (1992)
    Springer
    Journal of materials science 27 (1992), S. 853-862 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Porosity occurs in cast solidifying metals and alloys due to negative pressures generated during solidification contraction, and pressure developed by gases dissolved in the motten metal. Both the above processes may act either together or separately to produce such shrinkage or gas defects (collectively termed pores). They are generally unwanted and constitute a major industrial problem. This paper is an attempt to review up-to-date knowledge of the conditions of pore formation in cast metals and alloys. Various mechanisms responsible for pore nucleation and growth are summarized, and experimentally evaluated using an unfed type of mould with aluminium alloy castings. The observations are in support of a non-nucleation mechanism of pore formation playing a major role in the occurrence of such defects in cast metals. Further, in gas-containing alloy melts the critical amounts of gas required for single and multiple pore nucleation have been determined quantitatively and are listed in the text. The gas contents of the melts were measured using an apparatus based on the “first bubble technique”. It is also experimentally observed that under poor feeding conditions more than one of the non-classical nucleation mechanisms may be functional at the same time for the formation of such defects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01197634
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  • 7
    Electronic Resource
    Electronic Resource
    On the fracture characteristics of leaded aluminium alloys (1992)
    Springer
    Journal of materials science 11 (1992), S. 639-641 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00728890
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of lead content on tensile fracture of Al-4.5Cu-Pb bearing alloy (1993)
    Springer
    Journal of materials science 12 (1993), S. 1450-1452 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00591605
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of hardness on wear rates of AI-Si alloys (1995)
    Springer
    Journal of materials science 14 (1995), S. 1631-1632 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422658
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  • 10
    Electronic Resource
    Electronic Resource
    Heat transfer to laminar flow of nongray gases through a circular tube (1972)
    Springer
    Flow, turbulence and combustion 25 (1972), S. 155-170 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Analyses are presented for infrared radiative energy transfer in gases when other modes of energy transfer simultaneously occur. Fully developed laminar flow of an absorbing emitting gas in a circular tube is considered under the conditions of uniform wall heat flux. Nongray as well as gray formulations are presented, and results are obtained for illustrative cases. Appropriate limiting solutions of the governing equations are obtained and conduction-radiation interaction parameters are evaluated. The influence of variable wall emittance (gray and nongray) upon radiative energy transfer in nongray gases is investigated. In particular, nongray results are obtained, in the large path length limit, for the flow of CO2 through stainless steel tubes of various compositions. Finally, a correlation is presented which can be utilized to extend all nongray results for the parallel plate geometry, already available in literature, to yield results for the corresponding case of a circular tube.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382292
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