Abstract
Abstract
The design and operation of a novel type of fluidic vortex amplifier have been investigated experimentally using model tests with ambient air, and using computationally time-dependent computational fluid dynamics (CFD) simulation. The ultimate objective is to develop a no-moving-part variable air distribution device for implementation within gas turbine combustors using the fuel flow as the controlling agent. Although both liquid and gaseous fuels are ultimate goals of this device, this paper describes the first stage of the work involving operation with nominally uniform density fluid (air).
There is some discrepancy between the simulation and test data, but design and performance trends were usefully simulated. An important feature of the CFD was the occurrence of a weak time dependent flow structure, particularly with the Reynolds stress model (RSM). Flow modulation within the desired range (4.5 compared with 2.6) was demonstrated, and these are shown, along with some general points concerning computational modelling convergence and turbulence models.
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