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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 ,<math>w\sqrt{\theta}/{\delta}</math>, can be calculated as follows, assuming Imperial Units:

<math>w\sqrt{\theta}/{\delta} = w(\sqrt{T}/\sqrt{518.7})/(P/14.696)</math>

Corrected Flow is often given the symbol <math>wc</math> or <math>wr</math> (for referred flow).

So-called Non-Dimensional Flow <math>(w\sqrt{T}/{P}</math>) is proportional to Corrected Flow:

<math>w\sqrt{T}/{P}= w\sqrt{\theta}/{\delta} * \sqrt{518.7}/{14.696}</math>

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

<math>w\sqrt{\theta}/{\delta} = w(\sqrt{T}/\sqrt{288.15})/(P/101.325)</math>

<math>w\sqrt{T}/{P}= w\sqrt{\theta}/{\delta} * \sqrt{288.15}/{101.325}</math>

Nomenclature:

• <math>P</math> Stagnation (or Total) Pressure

• <math>T</math> Stagnation (or Total) Temperature

• <math>w</math> Real Mass Flow

• <math>{\delta}</math> Referred Pressure

• <math>{\theta}</math> 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