Endwall loss, often termed “secondary loss”, in axial turbines has been intensively studied
for many years, despite this the physical origin of much of the loss is not really understood …

Nonaxisymmetric endwall profiling is a promising method to reduce secondary losses in
axial turbines. However, in high-pressure turbines, a small amount of air is ejected at the …

Purge air is injected through seals in the hub and shroud of axial turbines in order to prevent
hot gas ingestion into the inter-stage gaps. An investigation into the losses involved with the …

In the present paper, the results of an experimental and numerical investigation of the hub
cavity modes and their migration into the main annulus flow are presented. A one-and-a-half …

In high-pressure turbines, a small amount of air is ejected at the hub rim seal to cool and
prevent the ingestion of hot gases into the cavity between the stator and the disk. This paper …

In the present paper, an experimental investigation of the effects of rim seal purge flow on
the performance of a highly loaded axial turbine stage is presented. The test configuration …

In aeroengines, purge flow directly fed from the compressor (which bypasses the combustor)
is introduced through the disk space between blade rows to prevent the hot ingress. Higher …

This paper describes a method of improving the cooling of the hub region of high-pressure
turbine (HPT) rotor by making better use of the unsteady coolant flows originating from the …

In the present work, URANS simulations are presented to describe the unsteady interaction
process between the flow ingested/ejected from a cavity system and the main flow evolving …

The paper presents an experimental and computational study of the unsteady behavior of
the rotor hub passage vortex in an axial low-pressure turbine. Different flow structures are …