  Volumetric velocimetry measurements have been performed on a round jet in
crossflow (JICF). Two kind of conditional averaging process are presented : a
global conditional average (GCA) and a local conditional average (LCA).
Vortices crossing the JICF symmetry plane are used to quantify the jet
pseudo-periodicity leading to the GCA and LCA definitions. Because they make
possible to improve the velocity field resolution as well as to significantly
reduce the experimental noise, these conditional averages are an interesting
and efficient way to study the instantaneous swirling structures of this
instantaneous flow.
