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  • 1
    Electronic Resource
    Electronic Resource
    Hot flow analysis of swirling sudden-expansion dump combustor (1992)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 14 (1992), S. 217-239 
    Details
    ISSN: 0271-2091
    Keywords: Swirling flow ; Swirling angle ; Combustion flow ; κ-∊ model ; Algebraic ; Reynolds stress ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Hot flow of a sudden-expansion dump combustor with swirling is analysed by employing an infinite chemical reaction rate. Turbulence properties are closed using one type of algebraic Reynolds stress model and two types of κ-∊ model. One of the κ-∊ models includes a swirling effect modification to the ε-equation. Computations have been performed by the SIMPLE-C algorithm with a power-law scheme. The calculated results of the momentum fields and turbulence quantities for swirling flow are compared with the available experimental data. It is shown that the standard κ-∊ model gives poor prediction of the mean velocity, particularly the tangential velocity. For the hot flow analysis of a sudden-expansion dump combustor with swirling flow it is suggested that it is necessary to use the modified κ-∊ model or algebraic Reynolds stress model.
    Additional Material: 30 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650140208
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical simulation of twin-jet impingement on a flat plate coupled with cross-flow (1992)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 14 (1992), S. 459-475 
    Details
    ISSN: 0271-2091
    Keywords: Impinging twin jet ; Fountain upwash flow ; Cross-flow ; Lift force ; κ-∊ model ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Theoretical research to simulate twin-jet impingement with cross-flow has been undertaken. An impinging twin jet coupled with cross-flow in closed ground effect has been studied by using the compressible Navier-Stokes equation with a Jones-Launder κ-∊ two-equation turbulence model. The velocity results without cross-flow were compared with the data of Saripalli et al. and found to show good agreement. The calculated results show that several recirculating zones are distributed around the flow field. Their size and location are closely related to the jet exit height above the ground, the nozzle space and the strength of cross-flow. In addition, a fountain upwash flow occurs between the nozzles, and two low-pressure recirculating zones are induced by the interaction between the nozzle mainstream and the fountain upwash flow. This induce a loss of lift force of the aircraft. The effects of the cross-flow induce the sudden decrease in the lift force of the aircraft; the stronger the cross-flow, the lower is the lift force of the flow field.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650140406
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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