Computation of unsteady turbomachinery flows: Part 2—LES and hybrids

PG Tucker - Progress in Aerospace Sciences, 2011 - Elsevier
The choice of turbulence model can have a strong impact on results for many
turbomachinery zones. Palliative corrections to them and also transition modeling can have …

Review of ingress in gas turbines

JA Scobie, CM Sangan… - … of Engineering for …, 2016 - asmedigitalcollection.asme.org
This review summarizes research concerned with the ingress of hot mainstream gas through
the rim seals of gas turbines. It includes experimental, theoretical, and computational studies …

Flow mechanisms in axial turbine rim sealing

JW Chew, F Gao, DM Palermo - Proceedings of the …, 2019 - journals.sagepub.com
This paper presents a review of research on turbine rim sealing with emphasis placed on the
underlying flow physics and modelling capability. Rim seal flows play a crucial role in …

Unsteady flow phenomena in turbine rim seals

PF Beard, F Gao, KS Chana… - … of Engineering for …, 2017 - asmedigitalcollection.asme.org
While turbine rim sealing flows are an important aspect of turbomachinery design, affecting
turbine aerodynamic performance and turbine disk temperatures, the present understanding …

Inertial waves in turbine rim seal flows

F Gao, JW Chew, O Marxen - Physical Review Fluids, 2020 - APS
Rotating fluids are well-known to be susceptible to waves. This has received much attention
from the geophysics, oceanographic and atmospheric research communities. Inertial waves …

Flow instabilities in gas turbine chute seals

JTM Horwood, FP Hualca… - … for Gas Turbines …, 2020 - asmedigitalcollection.asme.org
The ingress of hot annulus gas into stator–rotor cavities is an important topic to engine
designers. Rim-seals reduce the pressurized purge required to protect highly stressed …

Experimental and computational investigation of flow instabilities in turbine rim seals

JTM Horwood, FP Hualca… - … for Gas Turbines …, 2019 - asmedigitalcollection.asme.org
In high-pressure turbines, cool air is purged through rim seals at the periphery of wheel-
spaces between the stator and rotor disks. The purge suppresses the ingress of hot gas from …

Evaluation and application of advanced CFD models for rotating disc flows

F Gao, JW Chew - … of the Institution of Mechanical Engineers …, 2021 - journals.sagepub.com
This paper addresses limitations of widely used Reynolds-averaged turbulence models
(RANS) for prediction of gas turbine internal air systems. Results from direct numerical …

Large-eddy simulation of unsteady turbine rim sealing flows

F Gao, JW Chew, PF Beard, D Amirante… - International Journal of …, 2018 - Elsevier
Unsteady flow phenomena unrelated to the main gas-path blading have been identified in a
number of turbine rim seal investigations. This unsteadiness has significant influence on the …

Investigation of flow characteristics in a rotor-stator cavity under crossflow using wall-modelled large-eddy simulation

L Xie, Q Du, G Liu, Z Lian, Y Xie, Y Luo - Journal of Zhejiang University …, 2023 - Springer
Rotor-stator cavities are frequently encountered in engineering applications such as gas
turbine engines. They are usually subject to an external hot mainstream crossflow which in …