Corrected speed

From Wikipedia, the free encyclopedia

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}

Nomenclature:

  • 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: