Granular dynamics in a swirled annulus
WebJan 1, 2005 · Swirling flows may affect flame dynamics in two aspects. First, large-scale unsteady motions arising from shear-layer instability and vortex breakdown, as well as precession of vortex core (PVC), may couple resonantly with acoustic waves in the combustor, and subsequently cause combustion instabilities. WebMar 29, 2024 · Abstract. We experimentally study thermoacoustic transitions in an annular combustor consisting of sixteen premixed, swirl-stabilized turbulent flames. We show the changes in the characteristics of bifurcations leading to the state of longitudinal thermoacoustic instability (TAI) when equivalence ratio and bulk velocity are …
Granular dynamics in a swirled annulus
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WebApr 1, 2000 · Swirling granular solidlike clusters. Scherer, Kotter, +2 authors. Rehberg. Published 1 April 2000. Physics. Physical review. E, Statistical physics, plasmas, fluids, … WebNov 1, 1998 · A swirled annular channel is introduced that is suited to study the dynamics of granular arrays. We uncover the mechanism that is responsible for the change of the …
WebJul 8, 2024 · Granular material in a swirled container exhibits a curious transition as the number of particles is increased: At low densities, the particle cluster rotates in the same direction as the swirling motion of the container, while at high densities it rotates in the opposite direction. We investigate this phenomenon experimentally and numerically … WebJan 1, 2002 · We report measurements on five such systems, namely pattern formation of granular material i) by segregation, under the influence of ii) linear horizontal and iii) circular horizontal vibration, iv) water shear flow, and in v) a sedimenting suspension. Keywords Granular Material Discrete Element Method Vertical Vibration Glass Sphere Mustard Seed
WebMay 19, 2024 · Swirling gas flow is an important topic of research that helps in the design of rockets, atomizers,and gas turbine combustors. In the present work, swirl flow inside annular geometries with constant and varying cross-sectional areas are examined using computational fluid dynamics (CFD). Effects of changing the flow and geometric … WebSep 25, 2024 · This paper compares flow structures in a single- and triple-nozzle swirl combustor. Realistic combustor hardware usually contains several nozzles; however, test facilities for studying flame dynamics commonly use one nozzle. As such, it is important to determine how nozzle–nozzle interactions influence the dynamics of the system. …
WebDec 7, 2012 · We perform an experimental study of granular impact, where intruders strike 2D beds of photoelastic disks from above. High-speed video captures the intruder dynamics and the local granular force response, allowing investigation of grain-scale mechanisms in this process. We observe rich acoustic behavior at the leading edge of the intruder, …
WebThis paper presents bifurcation analyses characterising the nonlinear dynamics of fully developed laminar annular jets with respect to the centrebody diameter ${ {d}}$, Reynolds number ${ {Re}}$, and swirl ratio ${ {S}}$.Similar flows appear in numerous applications and feature a vibrant range of topological and dynamical characteristics associated with … landasan teori pengukuran berulangWebOct 15, 2024 · The characteristics of a central-toroidal recirculation zone can be predicted using the swirl number from a nozzle. We aim at developing a new ordinary-differential-equation-based model of the swirl number for annular swirl injectors with a … landasan teori pengukuran waktu kerjaWebApr 1, 2000 · Experiments and three-dimensional numerical simulations are presented to elucidate the dynamics of granular material in a cylindrical dish driven by a horizontal, periodic motion. landasan teori perancangan sistemWebJan 31, 2024 · Since the normal stress between the granular material and the bag is relatively small in comparison with that in the outer channel, we neglect the frictional … landasan teori perilaku proaktifWebJan 1, 2008 · Abstract. This volume introduces both theory and applications in detail. It includes differential dynamical models of granular shearing, dynamical strength … landasan teori perancangan buku ilustrasiWebMay 1, 2000 · Granular dynamics in a swirled annulus. Article. Nov 1998; ... Andreas Engel; Ingo Rehberg; A swirled annular channel is introduced that is suited to study the … landasan teori percobaan elektrolisisWebMay 19, 2024 · Swirling gas flow is an important topic of research that helps in the design of rockets, atomizers,and gas turbine combustors. In the present work, swirl flow inside … landasan teori percobaan melde