  The effects of removing large scales external to the inertial range on the
properties of scales within the inertial range are studied in a
high-Reynolds-number turbulent flow. Structure functions of both even and odd
orders are strongly affected across the entire inertial range, but odd-order
moments are affected to a greater degree. In particular, the skewness of
velocity increments shows a significant reduction whereas the flatness changes
comparatively little. The reduction in skewness is counterbalanced essentially
by the interaction between the small-scale energy and the large-scale rate of
strain. The implications of these results for the conventional cascade picture
are examined briefly.
