CORRECTED FLOW

'Corrected Flow' is the mass flow that would pass through a device (e.g. compressor, bypass duct, etc) if the inlet pressure and temperature corresponded to ambient conditions at Sea Level, on a Standard Day (i.e. 14.696lbf/in², 518.7R).
Corrected Flow ,'$wsqrt\{\; heta\}/\{delta\}$', can be calculated as follows, assuming Imperial Units:
'$wsqrt\{\; heta\}/\{delta\}\; =\; w(sqrt\{T\}/sqrt\{518.7\})/(P/14.696)$'
Corrected Flow is often given the symbol '$wc$' or '$wr$' (for referred flow).
So-called Non-Dimensional Flow '$(wsqrt\{T\}/\{P\}$)' is proportional to Corrected Flow:
'$wsqrt\{T\}/\{P\}=\; wsqrt\{\; heta\}/\{delta\}$
★ sqrt{518.7}/{14.696}'
The equivalent equations for Preferred SI Units are: (101.325kPa, 288.15K)
'$wsqrt\{\; heta\}/\{delta\}\; =\; w(sqrt\{T\}/sqrt\{288.15\})/(P/101.325)$'
'$wsqrt\{T\}/\{P\}=\; wsqrt\{\; heta\}/\{delta\}$
★ sqrt{288.15}/{101.325}'
Nomenclature:

★ '$P$' Stagnation (or Total) Pressure

★ '$T$' Stagnation (or Total) Temperature

★ '$w$' Real Mass Flow

★ '$\{delta\}$' Referred Pressure

★ '$\{\; heta\}$' Referred Temperature
In relative form, Corrected Flow, Referred Flow and Non-Dimensional Flow are all measures of axial Mach number.
See:

★ compressor map

★ turbine map

★ corrected speed