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A detailed modular governor-turbine model for multiple-spool gas turbine with scrutiny of bleeding effect

Balaghi Enalou, Hossein; Abbasi Soreshjani, Eshagh; Rashed, Mohamed; Shen Yeoh, Seang; Bozhko, Serhiy

Authors

Hossein Balaghi Enalou

Eshagh Abbasi Soreshjani

Mohamed Rashed

Seang Shen Yeoh ezzsy@exmail.nottingham.ac.uk

Serhiy Bozhko serhiy.bozhko@nottingham.ac.uk



Abstract

Multiple-spool gas turbines are usually utilized for power supply in aircrafts, ships, and terrestrial electric utility plants. As a result, having a reliable model of them can aid with the control design process and stability analysis. Since several interconnected components are coupled both thermodynamically and through shafts, these engines cannot be modeled linearly as single shaft gas turbines. In this paper, intercomponent volume method (ICV) has been implemented for turbine modeling. A switched feedback control system incorporating bump-less transfer and antiwindup functionality is employed as governor for the engine. Validation with test results from a three spool gas turbine highlights high accuracy of turbine-governor model in various maneuvers. Results show that over-speed after load rejection is considerable due to the fact that in this arrangement, the power turbine (PT) is not coupled with the compressor which acts like a damper for single shaft gas turbines. To address this problem, bleed valves (mainly before combustion chamber) are used to arrest the over-speed by 20%. In addition, a switch is employed into the governor system to rapidly shift fuel to permissible minimum flow.

Journal Article Type Article
Journal Journal of Engineering for Gas Turbines and Power
Print ISSN 0742-4795
Electronic ISSN 1528-8919
Publisher American Society of Mechanical Engineers
Peer Reviewed Peer Reviewed
Volume 139
Issue 11
Article Number 114501
APA6 Citation Balaghi Enalou, H., Abbasi Soreshjani, E., Rashed, M., Shen Yeoh, S., & Bozhko, S. (in press). A detailed modular governor-turbine model for multiple-spool gas turbine with scrutiny of bleeding effect. Journal of Engineering for Gas Turbines and Power, 139(11), https://doi.org/10.1115/1.4036947
DOI https://doi.org/10.1115/1.4036947
Publisher URL https://doi.org/10.1115/1.4036947
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
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