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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 adoaj:7b7dad7e9bbe486d8a43429cf5b9b7a3 fatcat:cju6tjhkd5a3jj4vqmeqljuvgy