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 (e.g. 14.696 lbf/in², 518.7R).

Corrected Flow, w θ / δ , can be calculated as follows, assuming Imperial Units:

w θ / δ = w T / 518.7 / ( P / 14.696 )

Corrected Flow is often given the symbol w c or w r (for referred flow).

So-called Non-Dimensional Flow, w T / P , is proportional to Corrected Flow:

w T / P = w θ / δ ∗ 518.7 / 14.696

The equivalent equations for Preferred SI Units are: (101.325kPa, 288.15K)

w θ / δ = w T / 288.15 / ( P / 101.325 )

w T / P = w θ / δ ∗ 288.15 / 101.325

Nomenclature:

In relative form, Corrected Flow, Referred Flow and Non-Dimensional Flow are all measures of axial Mach number.

Side note: If the mass flow can be considered an energy source such as fuel flow, the corrected flow is calculated as follows:

w / ( δ ∗ θ )