Efficiency Increase and Start-Up Strategy of an Axial Turbine Stage Under Periodic Inflow Conditions Using Extremum Seeking Control

2021 ◽  
pp. 288-302
Author(s):  
Daniel Topalovic ◽  
Rudibert King ◽  
Markus Herbig ◽  
Alexander Heinrich ◽  
Dieter Peitsch
Keyword(s):  
Extremum Seeking ◽  
Turbine Stage ◽  
Axial Turbine ◽  
Extremum Seeking Control ◽  
Start Up ◽  
Efficiency Increase ◽  
Inflow Conditions

Correction: Minimization of Pressure Fluctuations in an Axial Turbine Stage Under Periodic Inflow Conditions

2019 ◽  
Author(s):  
Daniel Topalovic ◽  
Sascha Wolff ◽  
Alexander Heinrich ◽  
Dieter Peitsch ◽  
Rudibert King
Keyword(s):  
Pressure Fluctuations ◽  
Turbine Stage ◽  
Axial Turbine ◽  
Inflow Conditions

Minimization of Pressure Fluctuations in an Axial Turbine Stage Under Periodic Inflow Conditions

2019 ◽  
Author(s):  
Daniel Topalovic ◽  
Sascha Wolff ◽  
Alexander Heinrich ◽  
Dieter Peitsch ◽  
Rudibert King
Keyword(s):  
Pressure Fluctuations ◽  
Turbine Stage ◽  
Axial Turbine ◽  
Inflow Conditions

Adaptive Extremum Seeking Control based LCL Filter Resonant Frequency Online Estimation

2021 ◽  
pp. 1-1
Author(s):  
Yuheng Wu ◽  
Mohammad Hazzaz Mahmud ◽  
Radha Sree Krishna Moorthy ◽  
Madhu Chinthavali ◽  
Yue Zhao
Keyword(s):  
Resonant Frequency ◽  
Extremum Seeking ◽  
Lcl Filter ◽  
Extremum Seeking Control ◽  
Online Estimation

Numerical investigation of non-uniform flow in twin-silo combustors and impact on axial turbine stage performance

2021 ◽  
pp. 095765092199394
Author(s):  
Hafiz M Hassan ◽  
Adeel Javed ◽  
Asif H Khoja ◽  
Majid Ali ◽  
Muhammad B Sajid
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Internal Flow ◽  
Large Temperature ◽  
Clear Understanding ◽  
Gas Temperature ◽  
Turbine Stage ◽  
Flow Angle ◽  
Axial Turbine ◽  
Stage Performance

A clear understanding of the flow characteristics in the older generation of industrial gas turbines operating with silo combustors is important for potential upgrades. Non-uniformities in the form of circumferential and radial variations in internal flow properties can have a significant impact on the gas turbine stage performance and durability. This paper presents a comprehensive study of the underlying internal flow features involved in the advent of non-uniformities from twin-silo combustors and their propagation through a single axial turbine stage of the Siemens v94.2 industrial gas turbine. Results indicate the formation of strong vortical structures alongside large temperature, pressure, velocity, and flow angle deviations that are mostly located in the top and bottom sections of the turbine stage caused by the excessive flow turning in the upstream tandem silo combustors. A favorable validation of the simulated exhaust gas temperature (EGT) profile is also achieved via comparison with the measured data. A drop in isentropic efficiency and power output equivalent to 2.28% points and 2.1 MW, respectively is observed at baseload compared to an ideal straight hot gas path reference case. Furthermore, the analysis of internal flow topography identifies the underperforming turbine blading due to the upstream non-uniformities. The findings not only have implications for the turbine aerothermodynamic design, but also the combustor layout from a repowering perspective.

scholarly journals Development of a generalized physical and mathematical model of working substance processes in an axial turbine stage

2021 ◽  
Vol 1843 (1) ◽  
pp. 012017
Author(s):  
V A Kalytka ◽  
M V Korovkin ◽  
P Sh Madi ◽  
A D Mekhtiyev ◽  
A V Bashirov ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Turbine Stage ◽  
Axial Turbine

scholarly journals Real-time Efficient Operation of Decatizing Processes via a Geometric-based Extremum Seeking Control

2020 ◽  
Vol 53 (2) ◽  
pp. 1614-1620
Author(s):  
Fabiana Federica Ferro ◽  
Michele Lionello ◽  
Mirco Rampazzo ◽  
Alessandro Beghi ◽  
Martin Guay
Keyword(s):  
Real Time ◽  
Extremum Seeking ◽  
Efficient Operation ◽  
Extremum Seeking Control
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