Reducing Vibrations Generated in a Gas Turbine Model MS9001E Used in South Baghdad Power Plant Station by Improving the Design of Bearings with Damper

Abdulah, Alaa Jasim; Khalifa, Muhannad Z.; Hanfesh, Abdul Jabbar O.

doi:10.30684/etj.v39i9.2134

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…The combustion chamber performance model was created using the energy balance equations presented in Equations 1, 2 and 3 [27], considering pressure loss. 𝑊𝑊 𝐿𝐿𝐻𝐻𝐻𝐻 = 𝑊𝑊 𝐿𝐿𝐻𝐻𝐻𝐻 , 𝑊𝑊 𝐿𝐿𝐻𝐻𝐻𝐻 = 𝑊𝑊 𝐿𝐿𝐻𝐻𝐻𝐻 , 𝑊𝑊 𝐻𝐻𝐻𝐻 = 𝑊𝑊 Load (3) where LHV is lower heating value, ɳ 𝒄𝒄𝒄𝒄 is combustion efficiency, 𝑚𝑚̇𝑎𝑎 is inlet air mass flow rate, 𝑚𝑚̇𝑓𝑓 is fuel mass flow rate, and h3 is high-pressure compressor exit enthalpy. 𝑊𝑊 𝐿𝐿𝐻𝐻𝐻𝐻 is low pressure compressor work, 𝑊𝑊 𝐿𝐿𝐻𝐻𝐻𝐻 is high pressure compressor work, 𝑊𝑊 𝑙𝑙𝐻𝐻𝐻𝐻 is high pressure turbine work, 𝑊𝑊 𝐻𝐻𝐻𝐻 is power turbine work, and 𝑊𝑊 Load is the load.…”

Section: Design Point Performance Modelingmentioning

confidence: 99%

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Studying the Influence of Variable Inlet Guide Vane with the Physical Faults on the Performance of Industrial Gas Turbine at Part-Load Operation

Salilew,

Abdul Karim,

Lemma

2023

ETJ

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Effects of drift, fouling, and erosion on gas turbine efficiency and output are investigated.• Fouling impacts upstream, while erosion affects downstream components in gas turbines.• Research findings support ML-based fault detection for optimal turbine maintenance.This research work presents a gas turbine performance investigation. Researchers have put efforts into this field of study; however, the influence of the concurrence of variable inlet guide vane (VIGV) drift, fouling, and erosion on the three-shaft gas turbine's performance during part-load operation has remained unexplored. Therefore, this study addresses this gap. First the gas turbine design point and offdesign performance model have been developed by utilizing the original engine manufacturer data provided. The accuracy of the models was validated, and the maximum mean absolute percentage error of the design point performance model is shown at exhaust temperature prediction, it is about 1.74%. The off-design performance model was also validated with the power output versus ambient temperature and efficiency versus operating curves. At each operational point, the power output versus ambient temperature error from the validation data was 0.02%, while the efficiency versus ambient temperature error was 4.5%. After the validation, the engine model was subjected to the concurrence of variable inlet guide vane drift, fouling, and erosion conditions to simulate the degradation state.The results show that the highest isentropic efficiency deviation due to component faults occurred in the upstream components, specifically in the low-pressure compressor's (LPC) isentropic efficiency. The deviation recorded due to the concurrence of VIGV drift at -6.5° and 100% fouling severity is -11.47%, whereas 9.65% is the LPC isentropic efficiency deviation recorded when VIGV drift at -6.5° and erosion at 100% severity level simultaneously occurred. In addition, the effects of the faults above on gas path measurements were simulated, and the highest measurement deviation was observed when simultaneous LPC fouling and -6.5% VIGV drift occurred. Among the measurements, the highest deviation was observed in the exhaust temperature and thermal efficiency, about 9.23% and -7.35%, respectively.

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Section: Design Point Performance Modelingmentioning

confidence: 99%

“…This hot gas expands and flows through the turbine, comprising a series of blades or vanes. As the gas passes over the turbine blades, the energy transfer will occur, causing the turbine to rotate [2,3]. The rotation of the turbine is used to drive the compressor and any attached machinery, such as a generator.…”

Section: Introductionmentioning

confidence: 99%

Studying the Influence of Variable Inlet Guide Vane with the Physical Faults on the Performance of Industrial Gas Turbine at Part-Load Operation

Salilew,

Abdul Karim,

Lemma

2023

ETJ

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“…It has been extensively studied by many researchers. A 45° inclined side of the groove of the internal surface of a tilting pad (TP) bearing with an internally pressurized oil film damper [3].…”

Section: Introductionmentioning

confidence: 99%

“…[3]. The fluent results are transferred to transient structural software to analyze the eccentricity of the shaft due to the unbalanced rotor.…”

mentioning

confidence: 99%

Numerical investigation on the vibration reduction of rotating shaft ‎using different groove shapes of tilt bearing‎

Abbood,

Abdulla

2023

Diagnostyka

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Vibration control is very important for high-speed rotors. Oil film damping is considered an effective vibration-damping method, especially for long shafts in gas turbines, ships, and other high-speed rotating equipment. The existing groove in the internal surface of the tilt bearing increases the amount of oil that flows through the bearing; this is more effective in suppressing the vibration of the rotor system carried by the plain bearing. In order to suppress the vibration of the rotor system, which is supported by sliding bearings, a different groove-shaped oil flow (GSOF) is studied and analysed in this paper. A different shape of grooves in bearings was set up and measured to study the vibration-damping effect of the flow oil shape with GSOF. ANSYS software presents significant benefits to engage Fluent for oil flow with Transient structural for vibration measurements. This paper uses these terms to perform the simulation numerically to explore the groove-shaped damper's damping effect under the rotor system. The study identified three enhancements of vibration and settling time. First, the circular groove showed a 35.71% reduction in amplitude and 10% increase in stilling time; the next one is the circular groove which reduced the amplitude by 42.85% and the settling time by 0%. The third modification was the inclined groove which reduced the amplitude by 42.85% and the settling time by 12%. The last one was the triple-inclined groove, which reduced the amplitude and settling time by 57.14% and 20%, respectively.

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Defect detection of rolling element bearings rotor system using vibration measurements of bearings base

Hammza,

Mohammed,

Ayed

2024

Electromechanical Engineering and Its Applications

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Reducing Vibrations Generated in a Gas Turbine Model MS9001E Used in South Baghdad Power Plant Station by Improving the Design of Bearings with Damper

Cited by 8 publications

References 9 publications

Studying the Influence of Variable Inlet Guide Vane with the Physical Faults on the Performance of Industrial Gas Turbine at Part-Load Operation

Studying the Influence of Variable Inlet Guide Vane with the Physical Faults on the Performance of Industrial Gas Turbine at Part-Load Operation

Numerical investigation on the vibration reduction of rotating shaft ‎using different groove shapes of tilt bearing‎

Defect detection of rolling element bearings rotor system using vibration measurements of bearings base

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