Determination of boundary layer transition and separation on double arc compressor blades in a large subsonic cascade.
determinationofb00mcgu.pdf (5.421Mb)Abstract
The china clay technique for flow visualization was used
to determine the surface flow on a double circular arc (DCA)
compressor blade in a large rectilinear subsonic cascade wind
tunnel. A calibration experiment using a large flat plate
model is also reported which allowed the drying patterns on
the DCA blading to be interpreted. Natural transition
occurred on the flat plate at a Reynolds Number based on
transition location of 0.8 x 10⁶, and on the suction surface
of the DCA blading at significant negative incidence angles
at a Reynolds Number based on transition location of approximately
0.5 x 10⁶. At incidence angles larger than -3⁰ , the
DCA blade showed a leading edge separation bubble with
turbulent reattachment.
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