This article presents a proven but advantageous concept for blade tip clearance evaluation in turbomachinery. The system is based on heavy duty probes and a high frequency (HF) and amplifying electronic unit followed by a signal processing unit. Measurements are taken under high temperature and other severe conditions such as ionization. Every single blade can be observed. The signals are digit...

A large-eddy-simulation-based  ow solver that combines an immersed-boundary technique with a curvilinear structured grid has been developed to study the temporal and spatial dynamics of an incompressible rotor-tipclearance  ow. The overall objective of these simulations is to determine the underlying mechanisms for lowpressure  uctuations downstream of the rotor near the end wall. Salient fe...