This report is a documentation of the results on flowfield surveys
for the GE/ARL mixer-ejector nozzle carried out in an open jet
facility at NASA Glenn Research Center. The results reported are
for cold (unheated) flow without any surrounding co-flowing stream.
Distributions of streamwise vorticity as well as turbulent
stresses, obtained by hot-wire anemometry, are presented for a low
subsonic condition. Pitot probe survey results are presented for
nozzle pressure ratios up to 3.5. Flowfields both inside and
outside of the ejector are considered. Inside the ejector, the mean
velocity distribution exhibits a cellular pattern on the cross
sectional plane, originating from the flow through the primary and
secondary chutes. With increasing downstream distance an
interchange of low velocity regions with adjacent high velocity
regions takes place due to the action of the streamwise vortices.
At the ejector exit, the velocity distribution is nonuniform at low
and high pressure ratios but reasonably uniform at intermediate
pressure ratios. The effects of two chevron configurations and a
tab configuration on the evolution of the downstream jet are also
studied. Compared to the baseline case, minor but noticeable
effects are observed on the flowfield.
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