The generation of resonant turbulence for a premixed burner


Verbeek, A.A. and Pos, R.C. and Stoffels, G.G.M. and Geurts, B.J. and Meer, Th.H. van der (2012) The generation of resonant turbulence for a premixed burner. In: 9th International ERCOFTAC Symposium on Engineering Turbulence Modeling and Measurements, ETMM 2012, 6-8 June 2012, Thessaloniki, Greece.

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Abstract:Is it possible to optimize the turbulent combustion of a low swirl burner by using resonance in turbulence? To that end an active grid is constructed that consists of two perforated disks of which one is rotating, creating a system of pulsating jets, which in the end can be used as a central blocking grid of a low swirl burner. The turbulence originating from this grid is studied by hot wire anemometry to see if there is a frequency for maximal response. Although no resonant enhancement of the turbulent kinetic energy or the dissipation rate is observed, the results for the two different sets of disks show that significant turbulent fluctuations are introduced mainly in the energy containing range and partially in the inertial sub range. These fluctuations represent up to 25% of the total turbulent energy and are not caused by pulsations of the mean flow.
Item Type:Conference or Workshop Item
Engineering Technology (CTW)
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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