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Laws of Jet Mixing of the swirled flow. in a Pipe

Journal of Energy and Power Engineering 2013年第7期7卷 1223-1230页

作者： Nikolay Shishkin Kutateladze Institute of Thermophysics Siberian Branch of Russian Academy of Science Novosibirsk 630090 Russia

Results of experimental research of the mixing process of coaxial flow. in a pipe with swirled peripheral jet are presented in this paper. Distribution of temperature and concentration of gases on the axis and wall of the channel under the influence of such factors as the regime flow. ratio of density of flow. and swirl degree of the peripheral jet are studied. Research of temperature, swirl angle, circulation in cross sections along with the channel have shown that their distributions have the jet-like character and are described by known dependences for the layer of mixture.

关键词： Film cooling adiabatic jet mixing swirl flow.

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Analytical Solution of the flow.Field Induced by the Uniformly Moving Double Helical Vortex Filaments

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Journal of Shanghai University(English Edition) 2005年第5期9卷 397-406页

作者：刘翔黄其柏廖道训温国珍 School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China Dongfang Electrical Machinery Co. Ltd. Deyang 618000 P. R. China

The analytical expressions was deduced for the inviscid flow.field induced by the double vortex filaments that move uniformly and rigidly without change of its form in a cylindrical tube, where the vortex filaments rotate around its axial with a constant angular velocity and translates along its axial with a constant transferal velocity. It is a key of solving problem to set up a moving cylindrical coordinate system together with the vortex filaments motion, in which the relative velocity field is presumed to be time-independent and with helical symmetry. The result shows that the absolute velocity field and pressure field are all time-periodic functions, and may degenerate into a time-independent field when the helical vortex filaments slip along the filaments themselves or is immobile. The calculation results at the location of pressure peaks and valleys on pipe wall are accordant with experimental results. When the cylindrical pipe radius tends to infinitely large quantity, it is also concluded that the double helical vortex filaments induce flow.field in an unbound space.

关键词： analytical solution moving double helical vortex time-dependent flow.field swirl flow.

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