Links

• CEARun-Chemical Equilibrium with Applications
• Isentropic Flow Equations
• JavaFoil Online Airfoil Designer
• GTL YouTube Page

Glossary

Bypass Ratio

Defined as the ratio of the mass flow going through the outer bypass divided by the mass flow going through its core.

Euler’s Turbomachinery Equation

Flow Coefficient

Degree of Reaction

DeHaller Number

Diffusion Factor

h-s (Mollier) Diagram

Similar to a T-s diagram, is a plot of enthalpy (j/Kg) vs. entropy (j/KgK). Lines of constant pressure are plotted.

Radial Equilibrium

Radial equilibrium signifies no radial velocity component at entry and exit of blade row (Cr=0). Any radial flow is within blade row; outside the row, flow is in radial equilibrium, as demonstrated by Figure 1, below. For more on Radial Equilibrium, go here.

Solidity

A measure of the ‘fullness’ of a blade row.

Total to Total Stage Efficiency

Velocity Triangle

A 2-D representation of the velocity distribution at a radial slice of a blade. Usually displaying axial and radial components of absolute and rotational velocity.

• Compressor
• Turbine
• Counter-Rotating

Work Coefficient