Investigation of Rotating Stall in a Single-Stage Axial Compressor Page: 4 of 29
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NACA TN 3823 3
p separation between inlet guide vanes and rotor
Ps static pressure
rt rotor tip radius
U rotor velocity at mean radius
V stall-propagat ion velocity at mean radius relative to rotor
w inlet velocity relative to rotor
x,y coordinate directions
al absolute air angle entering rotor
m2 absolute air angle leaving rotor
P1 air inlet angle relative to rotor
P2 air outlet angle relative to rotor
perturbation velocity potential
angular frequency of stall propagation
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Montgomery, S. R. & Braun, J. J. Investigation of Rotating Stall in a Single-Stage Axial Compressor, report, January 1957; (https://digital.library.unt.edu/ark:/67531/metadc56040/m1/4/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.