Time-Mean Helicity Distribution in Turbulent Swirling Jets
DOI:
https://doi.org/10.14311/776Keywords:
helicity, chirality, jets, swirling flows, swirl generator, supercirculationAbstract
Helicity offers an alternative approach to investigations of the structure of turbulent flows. Knowledge of the spatial distribution of the time-mean component of helicity is the starting point. Yet very little is known even about basic cases in which Helicity plays important role, such as the case of a swirling jet. This is the subject of the present investigations, based mainly on numerical flowfield computations. The region of significantly large time-mean helicity density is found only in a rather small region reaching to several nozzle diameters downstream from the exit. The most important result is the similarity of the helicity density profiles.Downloads
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