dsc82434.jpg

Detail of a turbine exhaust manifold "omega joint".

The turbine exhaust manifold incorporates 15 such joints (so called because their cross-section resembles the Greek letter Ω) to allow for thermal expansion.

Picture 3 of 4.

This photo is of the interior of an omega expansion joint, taken through the flow vanes on the aft end of the turbine exhaust manifold.