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Transient CFD and experimental analysis for improved Pelton turbine casing designs

Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

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Transient CFD and experimental analysis for improved Pelton turbine casing designs. / Petley, Sean; Aggidis, George Athanasios.
2018. Paper presented at 29th IAHR Symposium on Hydraulic Machinery and Systems , Kyoto, Japan.

Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

Harvard

Petley, S & Aggidis, GA 2018, 'Transient CFD and experimental analysis for improved Pelton turbine casing designs', Paper presented at 29th IAHR Symposium on Hydraulic Machinery and Systems , Kyoto, Japan, 17/09/18 - 21/09/18.

APA

Petley, S., & Aggidis, G. A. (2018). Transient CFD and experimental analysis for improved Pelton turbine casing designs. Paper presented at 29th IAHR Symposium on Hydraulic Machinery and Systems , Kyoto, Japan.

Vancouver

Petley S, Aggidis GA. Transient CFD and experimental analysis for improved Pelton turbine casing designs. 2018. Paper presented at 29th IAHR Symposium on Hydraulic Machinery and Systems , Kyoto, Japan.

Author

Petley, Sean ; Aggidis, George Athanasios. / Transient CFD and experimental analysis for improved Pelton turbine casing designs. Paper presented at 29th IAHR Symposium on Hydraulic Machinery and Systems , Kyoto, Japan.

Bibtex

@conference{248b069a493245c0a3a3009bdc3ee69c,
title = "Transient CFD and experimental analysis for improved Pelton turbine casing designs",
abstract = "Impulse turbine casings play a very important role and experience dictates that the efficiency of a Pelton turbine is closely dependent on the success of keeping vagrant spray water away from the turbine runner and the water jet. Despite this overarching purpose, there is no standard design guidelines and casing styles vary from manufacturer to manufacturer, often incorporating a considerable number of shrouds and baffles to direct the flow of water into the tailrace with minimal interference with the aforementioned. Secondly, the success of a casingdesign is dependent on its ability to maintain this objective across a wide range of operating conditions that vary as a consequence of fluctuations in speed and load, resulting in considerable differences in spray leaving the runner. Conventionally, the baffle plates are designed to be most effective at the best efficiency, or duty, point and have been shown to be ineffective at extremes of speed and load. Therefore, efforts to design a casing with minimal amount of shrouding to reduce manufacturing costs is the objective of the project sponsors. The present work incorporates the Reynolds-averaged Navier Stokes (RANS) k-ɛ turbulence model and a two phase Volume of Fluid (VOF) model, using the ANSYS{\textregistered} FLUENT{\textregistered} code to simulate the casing flow in a 2-jet horizontal axis Pelton turbine. The results of the simulation of two casing configurations are compared against flow visualisations and measurements obtained from a model established at the National Technical University of Athens. The CFD simulation also informs the design of new casing inserts to see their influence on the flow. Therefore, the outcome of this investigation provides further insight into guidelines for improved Pelton turbine casing design. ",
author = "Sean Petley and Aggidis, {George Athanasios}",
year = "2018",
month = sep,
day = "17",
language = "English",
note = "29th IAHR Symposium on Hydraulic Machinery and Systems ; Conference date: 17-09-2018 Through 21-09-2018",

}

RIS

TY - CONF

T1 - Transient CFD and experimental analysis for improved Pelton turbine casing designs

AU - Petley, Sean

AU - Aggidis, George Athanasios

PY - 2018/9/17

Y1 - 2018/9/17

N2 - Impulse turbine casings play a very important role and experience dictates that the efficiency of a Pelton turbine is closely dependent on the success of keeping vagrant spray water away from the turbine runner and the water jet. Despite this overarching purpose, there is no standard design guidelines and casing styles vary from manufacturer to manufacturer, often incorporating a considerable number of shrouds and baffles to direct the flow of water into the tailrace with minimal interference with the aforementioned. Secondly, the success of a casingdesign is dependent on its ability to maintain this objective across a wide range of operating conditions that vary as a consequence of fluctuations in speed and load, resulting in considerable differences in spray leaving the runner. Conventionally, the baffle plates are designed to be most effective at the best efficiency, or duty, point and have been shown to be ineffective at extremes of speed and load. Therefore, efforts to design a casing with minimal amount of shrouding to reduce manufacturing costs is the objective of the project sponsors. The present work incorporates the Reynolds-averaged Navier Stokes (RANS) k-ɛ turbulence model and a two phase Volume of Fluid (VOF) model, using the ANSYS® FLUENT® code to simulate the casing flow in a 2-jet horizontal axis Pelton turbine. The results of the simulation of two casing configurations are compared against flow visualisations and measurements obtained from a model established at the National Technical University of Athens. The CFD simulation also informs the design of new casing inserts to see their influence on the flow. Therefore, the outcome of this investigation provides further insight into guidelines for improved Pelton turbine casing design.

AB - Impulse turbine casings play a very important role and experience dictates that the efficiency of a Pelton turbine is closely dependent on the success of keeping vagrant spray water away from the turbine runner and the water jet. Despite this overarching purpose, there is no standard design guidelines and casing styles vary from manufacturer to manufacturer, often incorporating a considerable number of shrouds and baffles to direct the flow of water into the tailrace with minimal interference with the aforementioned. Secondly, the success of a casingdesign is dependent on its ability to maintain this objective across a wide range of operating conditions that vary as a consequence of fluctuations in speed and load, resulting in considerable differences in spray leaving the runner. Conventionally, the baffle plates are designed to be most effective at the best efficiency, or duty, point and have been shown to be ineffective at extremes of speed and load. Therefore, efforts to design a casing with minimal amount of shrouding to reduce manufacturing costs is the objective of the project sponsors. The present work incorporates the Reynolds-averaged Navier Stokes (RANS) k-ɛ turbulence model and a two phase Volume of Fluid (VOF) model, using the ANSYS® FLUENT® code to simulate the casing flow in a 2-jet horizontal axis Pelton turbine. The results of the simulation of two casing configurations are compared against flow visualisations and measurements obtained from a model established at the National Technical University of Athens. The CFD simulation also informs the design of new casing inserts to see their influence on the flow. Therefore, the outcome of this investigation provides further insight into guidelines for improved Pelton turbine casing design.

M3 - Conference paper

T2 - 29th IAHR Symposium on Hydraulic Machinery and Systems

Y2 - 17 September 2018 through 21 September 2018

ER -