What is annulus area in a compressor?
It's not a general term as far as I know, but it can be the area between cylinder and the piston.
Sorry for being not clear. I was talking about the annulus area of a compressor in a gas turbine engine, not a reciprocating one.
See - NACA 65-series compressor rotor per...ds number and comparison with cascade results
George C. Ashby, Jr John R. Erwin Wallace M. Schulze
NACA TN 4130
The annulus area appears to be the area between shaft and casing.
It's the flow area in the compressor. It's an annulus because it is formed by two concentric circles i.e. the rotor and the compressor case.
Thanks for the help
Separate names with a comma.