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Corrected speed: Wikis


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Corrected Speed is the speed a component would rotate at if the inlet temperature corresponded to ambient conditions at Sea Level, on a Standard Day (i.e. 288.15K).

Corrected Speed ,N/{\sqrt{\theta}}, can be calculated as follows:

N/\sqrt{\theta} = N/(\sqrt{T}/\sqrt{288.15})

Corrected Speed is often abbreviated to Nc or Nr (for Referred Speed).

So-called Non-Dimensional Speed (N/\sqrt{T}) is proportional to Corrected Speed:

N/\sqrt{T}= (N/\sqrt{\theta}) / \sqrt{288.15}


  • T Stagnation (or Total) Temperature
  • N Real Shaft Speed
  • θ Referred Temperature

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

See also


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