Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations

Zhihui Li; Loizos Christodoulou; Richard Jefferson-Loveday; Stephen Ambrose; Richard Jackson; Gary D. Lock; Carl M. Sangan; James A. Scobie

doi:10.1115/GT2023-103532

Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations

Zhihui Li, Loizos Christodoulou, Richard Jefferson-Loveday, Stephen Ambrose, Richard Jackson, Gary D. Lock, Carl M. Sangan, James A. Scobie

University of Nottingham

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

2 Citations (SciVal)

Abstract

The windage torque on rotational walls has negative effect on the performance of the low pressure turbine. In this paper, three novel flow control concepts (FCCs) were proposed to reduce the windage torque within a turbine stator well, with upstream and downstream cavities connected by an interstage labyrinth seal. The swirl and flow pattern inside a reference turbine cavity was first investigated and the potential locations for the FCCs were identified using numerical simulations. FCC1 was a circumferential row of leaned deflectors downstream of the labyrinth seal. FCC2 was a set of deflector vanes and platform to optimize the ingress swirl at high radius in the upstream cavity. FCC3 combined the two flow concepts and the superposition resulted in a stator well windage torque reduction of 70% when compared to the baseline design. The FCCs also showed performance benefits at off-design conditions and over a range of secondary flow rates to the cavity. In Part 2 [1], the numerical analysis and performance of the FCCs are validated in an experimental rig, using additively-manufactured components.

Original language	English
Title of host publication	Turbomachinery - Axial Flow Turbine Aerodynamics
Subtitle of host publication	Axial Flow Turbine Aerodynamics
Volume	13B
ISBN (Electronic)	9780791887097
DOIs	https://doi.org/10.1115/GT2023-103532
Publication status	Published - 28 Sept 2023
Event	ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition - Boston, Massachusetts, USA Duration: 26 Jun 2023 → 30 Jun 2023

Publication series

Name	Proceedings of the ASME Turbo Expo
Volume	13B

Conference

Conference	ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition
Period	26/06/23 → 30/06/23

Bibliographical note

Funding Information:
The authors would like to thank for the financial support from the Clean Sky 2 Joint Undertaking under the European Union's Horizon 2020 research and innovation program (H2020- GAP-886112-ACUHRA). The calculations were performed using the University of Nottingham HPC Facility and Sulis at HPC Midlands Plus, which was funded by EPSRC grant EP/T022108/1.

Funding Information:
The authors would like to thank for the financial support from the Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation program (H2020-GAP-886112-ACUHRA). The calculations were performed using the University of Nottingham HPC Facility and Sulis at HPC Midlands Plus, which was funded by EPSRC grant EP/T022108/1.

Publisher Copyright:
Copyright © 2023 by ASME.

Keywords

CFD
Flow control concept
Hub cavity
Low pressure turbine
Seal flow
Windage torque

ASJC Scopus subject areas

General Engineering

Access to Document

10.1115/GT2023-103532

Cite this

Li, Z., Christodoulou, L., Jefferson-Loveday, R., Ambrose, S., Jackson, R., Lock, G. D., Sangan, C. M., & Scobie, J. A. (2023). Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations. In Turbomachinery - Axial Flow Turbine Aerodynamics: Axial Flow Turbine Aerodynamics (Vol. 13B). Article v13bt30a035 (Proceedings of the ASME Turbo Expo; Vol. 13B). https://doi.org/10.1115/GT2023-103532

Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations. / Li, Zhihui; Christodoulou, Loizos; Jefferson-Loveday, Richard et al.
Turbomachinery - Axial Flow Turbine Aerodynamics: Axial Flow Turbine Aerodynamics. Vol. 13B 2023. v13bt30a035 (Proceedings of the ASME Turbo Expo; Vol. 13B).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Li, Z, Christodoulou, L, Jefferson-Loveday, R, Ambrose, S, Jackson, R, Lock, GD , Sangan, CM & Scobie, JA 2023, Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations. in Turbomachinery - Axial Flow Turbine Aerodynamics: Axial Flow Turbine Aerodynamics. vol. 13B, v13bt30a035, Proceedings of the ASME Turbo Expo, vol. 13B, ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, 26/06/23. https://doi.org/10.1115/GT2023-103532

Li Z, Christodoulou L, Jefferson-Loveday R, Ambrose S, Jackson R, Lock GD et al. Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations. In Turbomachinery - Axial Flow Turbine Aerodynamics: Axial Flow Turbine Aerodynamics. Vol. 13B. 2023. v13bt30a035. (Proceedings of the ASME Turbo Expo). Epub 2023 Sept 28. doi: 10.1115/GT2023-103532

@inproceedings{a5130bbc8faf441599dd2b94076998d5,

title = "Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations",

abstract = "The windage torque on rotational walls has negative effect on the performance of the low pressure turbine. In this paper, three novel flow control concepts (FCCs) were proposed to reduce the windage torque within a turbine stator well, with upstream and downstream cavities connected by an interstage labyrinth seal. The swirl and flow pattern inside a reference turbine cavity was first investigated and the potential locations for the FCCs were identified using numerical simulations. FCC1 was a circumferential row of leaned deflectors downstream of the labyrinth seal. FCC2 was a set of deflector vanes and platform to optimize the ingress swirl at high radius in the upstream cavity. FCC3 combined the two flow concepts and the superposition resulted in a stator well windage torque reduction of 70% when compared to the baseline design. The FCCs also showed performance benefits at off-design conditions and over a range of secondary flow rates to the cavity. In Part 2 [1], the numerical analysis and performance of the FCCs are validated in an experimental rig, using additively-manufactured components.",

keywords = "CFD, Flow control concept, Hub cavity, Low pressure turbine, Seal flow, Windage torque",

author = "Zhihui Li and Loizos Christodoulou and Richard Jefferson-Loveday and Stephen Ambrose and Richard Jackson and Lock, {Gary D.} and Sangan, {Carl M.} and Scobie, {James A.}",

note = "Funding Information: The authors would like to thank for the financial support from the Clean Sky 2 Joint Undertaking under the European Union's Horizon 2020 research and innovation program (H2020- GAP-886112-ACUHRA). The calculations were performed using the University of Nottingham HPC Facility and Sulis at HPC Midlands Plus, which was funded by EPSRC grant EP/T022108/1. Funding Information: The authors would like to thank for the financial support from the Clean Sky 2 Joint Undertaking under the European Union{\textquoteright}s Horizon 2020 research and innovation program (H2020-GAP-886112-ACUHRA). The calculations were performed using the University of Nottingham HPC Facility and Sulis at HPC Midlands Plus, which was funded by EPSRC grant EP/T022108/1. Publisher Copyright: Copyright {\textcopyright} 2023 by ASME.; ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition ; Conference date: 26-06-2023 Through 30-06-2023",

year = "2023",

month = sep,

day = "28",

doi = "10.1115/GT2023-103532",

language = "English",

isbn = "9780791887097",

volume = "13B",

series = "Proceedings of the ASME Turbo Expo",

booktitle = "Turbomachinery - Axial Flow Turbine Aerodynamics",

}

TY - GEN

T1 - Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1

T2 - ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition

AU - Li, Zhihui

AU - Christodoulou, Loizos

AU - Jefferson-Loveday, Richard

AU - Ambrose, Stephen

AU - Jackson, Richard

AU - Lock, Gary D.

AU - Sangan, Carl M.

AU - Scobie, James A.

N1 - Funding Information: The authors would like to thank for the financial support from the Clean Sky 2 Joint Undertaking under the European Union's Horizon 2020 research and innovation program (H2020- GAP-886112-ACUHRA). The calculations were performed using the University of Nottingham HPC Facility and Sulis at HPC Midlands Plus, which was funded by EPSRC grant EP/T022108/1. Funding Information: The authors would like to thank for the financial support from the Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation program (H2020-GAP-886112-ACUHRA). The calculations were performed using the University of Nottingham HPC Facility and Sulis at HPC Midlands Plus, which was funded by EPSRC grant EP/T022108/1. Publisher Copyright: Copyright © 2023 by ASME.

PY - 2023/9/28

Y1 - 2023/9/28

N2 - The windage torque on rotational walls has negative effect on the performance of the low pressure turbine. In this paper, three novel flow control concepts (FCCs) were proposed to reduce the windage torque within a turbine stator well, with upstream and downstream cavities connected by an interstage labyrinth seal. The swirl and flow pattern inside a reference turbine cavity was first investigated and the potential locations for the FCCs were identified using numerical simulations. FCC1 was a circumferential row of leaned deflectors downstream of the labyrinth seal. FCC2 was a set of deflector vanes and platform to optimize the ingress swirl at high radius in the upstream cavity. FCC3 combined the two flow concepts and the superposition resulted in a stator well windage torque reduction of 70% when compared to the baseline design. The FCCs also showed performance benefits at off-design conditions and over a range of secondary flow rates to the cavity. In Part 2 [1], the numerical analysis and performance of the FCCs are validated in an experimental rig, using additively-manufactured components.

AB - The windage torque on rotational walls has negative effect on the performance of the low pressure turbine. In this paper, three novel flow control concepts (FCCs) were proposed to reduce the windage torque within a turbine stator well, with upstream and downstream cavities connected by an interstage labyrinth seal. The swirl and flow pattern inside a reference turbine cavity was first investigated and the potential locations for the FCCs were identified using numerical simulations. FCC1 was a circumferential row of leaned deflectors downstream of the labyrinth seal. FCC2 was a set of deflector vanes and platform to optimize the ingress swirl at high radius in the upstream cavity. FCC3 combined the two flow concepts and the superposition resulted in a stator well windage torque reduction of 70% when compared to the baseline design. The FCCs also showed performance benefits at off-design conditions and over a range of secondary flow rates to the cavity. In Part 2 [1], the numerical analysis and performance of the FCCs are validated in an experimental rig, using additively-manufactured components.

KW - CFD

KW - Flow control concept

KW - Hub cavity

KW - Low pressure turbine

KW - Seal flow

KW - Windage torque

UR - http://www.scopus.com/inward/record.url?scp=85177433704&partnerID=8YFLogxK

U2 - 10.1115/GT2023-103532

DO - 10.1115/GT2023-103532

M3 - Chapter in a published conference proceeding

SN - 9780791887097

VL - 13B

T3 - Proceedings of the ASME Turbo Expo

BT - Turbomachinery - Axial Flow Turbine Aerodynamics

Y2 - 26 June 2023 through 30 June 2023

ER -

Windage Torque Reduction in Low-Pressure Turbine Cavities - Part 1: Concept Design and Numerical Investigations

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this