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Title: GAS TURBINE REHEAT USING IN SITU COMBUSTION

Abstract

In situ reheat is an alternative to traditional gas turbine reheat design in which fuel is fed through airfoils rather than in a bulky discrete combustor separating HP and LP turbines. The goals are to achieve increased power output and/or efficiency without higher emissions. In this program the scientific basis for achieving burnout with low emissions has been explored. In Task 1, Blade Path Aerodynamics, design options were evaluated using CFD in terms of burnout, increase of power output, and possible hot streaking. It was concluded that Vane 1 injection in a conventional 4-stage turbine was preferred. Vane 2 injection after vane 1 injection was possible, but of marginal benefit. In Task 2, Combustion and Emissions, detailed chemical kinetics modeling, validated by Task 3, Sub-Scale Testing, experiments, resulted in the same conclusions, with the added conclusion that some increase in emissions was expected. In Task 4, Conceptual Design and Development Plan, Siemens Westinghouse power cycle analysis software was used to evaluate alternative in situ reheat design options. Only single stage reheat, via vane 1, was found to have merit, consistent with prior Tasks. Unifying the results of all the tasks, a conceptual design for single stage reheat utilizing 24 holes,more » 1.8 mm diameter, at the trailing edge of vane 1 is presented. A development plan is presented.« less

Authors:
; ;
Publication Date:
Research Org.:
Siemens Westinghouse Power Corporation (US)
Sponsoring Org.:
(US)
OSTI Identifier:
827534
DOE Contract Number:  
FC26-00NT40913
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 17 May 2004
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; AERODYNAMICS; BURNOUT; DESIGN; ENERGY EFFICIENCY; GAS TURBINES; IN-SITU COMBUSTION; COMBUSTION KINETICS; COMPUTERIZED SIMULATION; TESTING

Citation Formats

D.M. Bachovchin, T.E. Lippert, and R.A. Newby P.G.A. Cizmas. GAS TURBINE REHEAT USING IN SITU COMBUSTION. United States: N. p., 2004. Web. doi:10.2172/827534.
D.M. Bachovchin, T.E. Lippert, & R.A. Newby P.G.A. Cizmas. GAS TURBINE REHEAT USING IN SITU COMBUSTION. United States. doi:10.2172/827534.
D.M. Bachovchin, T.E. Lippert, and R.A. Newby P.G.A. Cizmas. Mon . "GAS TURBINE REHEAT USING IN SITU COMBUSTION". United States. doi:10.2172/827534. https://www.osti.gov/servlets/purl/827534.
@article{osti_827534,
title = {GAS TURBINE REHEAT USING IN SITU COMBUSTION},
author = {D.M. Bachovchin and T.E. Lippert and R.A. Newby P.G.A. Cizmas},
abstractNote = {In situ reheat is an alternative to traditional gas turbine reheat design in which fuel is fed through airfoils rather than in a bulky discrete combustor separating HP and LP turbines. The goals are to achieve increased power output and/or efficiency without higher emissions. In this program the scientific basis for achieving burnout with low emissions has been explored. In Task 1, Blade Path Aerodynamics, design options were evaluated using CFD in terms of burnout, increase of power output, and possible hot streaking. It was concluded that Vane 1 injection in a conventional 4-stage turbine was preferred. Vane 2 injection after vane 1 injection was possible, but of marginal benefit. In Task 2, Combustion and Emissions, detailed chemical kinetics modeling, validated by Task 3, Sub-Scale Testing, experiments, resulted in the same conclusions, with the added conclusion that some increase in emissions was expected. In Task 4, Conceptual Design and Development Plan, Siemens Westinghouse power cycle analysis software was used to evaluate alternative in situ reheat design options. Only single stage reheat, via vane 1, was found to have merit, consistent with prior Tasks. Unifying the results of all the tasks, a conceptual design for single stage reheat utilizing 24 holes, 1.8 mm diameter, at the trailing edge of vane 1 is presented. A development plan is presented.},
doi = {10.2172/827534},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 17 00:00:00 EDT 2004},
month = {Mon May 17 00:00:00 EDT 2004}
}

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