منابع مشابه
Dispersion of Evaporating Droplets in a Swirling Axisymmetric Jet
The effects of swirl and vaporization on droplet dispersion are investigated in the near region of a two-phase, swirling, heated jet. Simulations are based on the numerical solution of time-dependent, axisymmetric gas-phase equations.Droplets’ trajectories are tracked byusingaLagrangianapproach.Forall of the swirl cases investigated, the droplet dispersion exhibits a nonmonotonic behavior, with...
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Many gas turbine combustion systems employ swirl to help mix fuel and air and subsequently stabilize the reaction. In the case of liquid fuels, strategic introduction of the liquid into the swirling flow can provide improved combustion performance. In the present work, radial injection of a plain jet into a swirling flow is considered. A large body of work is available in the literature for liq...
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We present the results of a multi-epoch radio monitoring campaign measuring the milliarcsecond structure of the jet in the radio-quiet quasar PG1407+263. This is the highest-sensitivity, highestresolution multi-year study of a distant active galaxy. The observations are naturally explained in terms of a beamed relativistic jet, some of whose fluctuations in flux density can be ascribed to inter...
متن کاملThe milliarcsecond - scale jet in the quasar J 1625 + 4134
We present Very Long Baseline Array (VLBA) observations of the radio source J1625+4134 at 22 and 15 GHz and analyze them in concurrence with other existing VLBI data on this source. The high resolution images at 15 and 22 GHz show a short and bending jet which has about 270 • difference in position angle with the northern jet detected at lower frequencies. The new high resolution data, combined...
متن کاملLes of a Free Annular Swirling Jet - Dependence of Coherent Structures on a Pilot Jet and the Level of Swirl
The paper presents large eddy simulation of unconfined swirling jets. In the first part, an unconfined annular jet is investigated for swirl numbers ranging from 0 to 1.2. The impact of the swirl on the mean flow and the precessing vortex structures in this flow is analysed. In the second part of the paper, a co-annular pilot jet is introduced near the axis. The investigations show that the add...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2017
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201629999