Blade Tip Mach & Reynolds

Compute blade-tip relative Mach number and chord Reynolds number from rpm, radius, axial speed, and properties.

visual calculatorTurbomachinery & Rotating Flow

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

input scale

model

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tip Machblade Reynoldsrotating framecompressibility

formula

KaTeX rendered

\begin{aligned}\text{U\_tip = omega R}\\[0.35em]\text{W = sqrt(U\_tip\^{}2 + U\_axial\^{}2)}\\[0.35em]\text{M\_rel = W/a}\\[0.35em]\text{Re\_c = rho W c/mu}\end{aligned}

ASCII source

U_tip = omega R, W = sqrt(U_tip^2 + U_axial^2), M_rel = W/a, Re_c = rho W c/mu

rpmtip radius (m)chord (m)axial U (m/s)T (K)rho (kg/m3)mu (Pa s)

tip speed (m/s)

226.195

relative speed (m/s)

239.925

Mach rel

0.7051

Re chord

5.715e+5

omega (rad/s)

1256.637

Tip Mach and chord Reynolds number are quick checks before setting rotating-frame compressibility and near-wall mesh targets.

tip Mach blade Reynolds rotating frame compressibility