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Development and Verification of 3000 Rpm 48 Inch Integral Shroud Blade for Steam Turbine

Yasutomo KANEKO, Kazushi MORI, Hiroharu OHYAMA
2006 JSME international journal. Series B, Fluids and thermal engineering  
As the final verification test, the field test of the actual steam turbine was carried out in the site during the trial operation, and the vibration stress of the 3 000 rpm 48 inch blade was measured by  ...  The 3 000 rpm 48 inch blade for steam turbine was developed as one of the new standard series of LP end blades. The new LP end blades are characterized by the ISB (Integral Shroud Blade) structure.  ...  As the final verification test, the field test of the actual steam turbine was carried out in the site during the trial operation, and the vibration stress of the 3 000 rpm 48 inch blade was measured by  ... 
doi:10.1299/jsmeb.49.205 fatcat:qv4m4k5r6bb3dgp6de2gxhne4e

Analysis and Measurement of Damping Characteristics of Integral Shroud Blade for Steam Turbine

Yasutomo KANEKO, Hiroharu OHYAMA
2008 Journal of System Design and Dynamics  
To improve the reliability and the thermal efficiency of LP Low pressure end blades of steam turbine, new standard series of LP end blades have been developed.  ...  Second, the calculated natural frequency and blade damping are compared with the measured ones.  ...  Measurement of Damping Characteristics by Actual Loading Test To verify the reliability of a newly developed steam turbine blade, it is essential to measure the vibratory stress under actual operating  ... 
doi:10.1299/jsdd.2.311 fatcat:ufzzayrs4jhi3e6bho6a54jhlq

Numerical Analysis on Steam Exciting Force Caused by Rotor Eccentricity

L. H. Cao, J. X. Wang, P. Li, P. F. Hu, Y. Li
2017 Shock and Vibration  
This research provides a theoretical guidance for the operation safety and optimization of steam turbines.  ...  Therefore, a full-circle stage of steam turbine with shroud and labyrinth seals was investigated by numerical simulator CFX.  ...  Acknowledgments This work was supported by National Natural Science Foundation of China (NSFC) (no. 51576036).  ... 
doi:10.1155/2017/8602965 fatcat:kn7uyugqlzbhzols4gt23nrqde

Nucleation phenomena in a multi-stage low pressure steam turbine

D. E. Bohn, N Sürken, F Kreitmeier
2003 Proceedings of the Institution of mechanical engineers. Part A, journal of power and energy  
The reduction of these loss mechanisms is the subject of research project at the Institute of Steam and Gas Turbines, Aachen University.  ...  In order to take into account the additional viscous effects due to shrouded bladings, the open shroud cavities are modeled in detail.  ...  The authors gratefully acknowledge AG Turbo and ALSTOM Power for their support and permission to publish this paper. The responsibility for the content of this publication lies with the authors.  ... 
doi:10.1243/095765003322315513 fatcat:mi3vqg4aw5cszf6niv6phrfceu

The Working Principle of a Turbine "Case Study: GE Frame 9E Gas Turbine"

Obolo Olupitan Emmanuel
2019 Journal of Engineering Research and Reports  
Instead of reciprocating motion, the gas turbine uses a rotary motion throughout, and that is the only difference.  ...  Gas Turbine is one of the machines that use the thermodynamic principle converting fuel energy to mechanical energy. It is an internal combustion engine.  ...  gas, both the gas turbine and the steam turbine can be operated and thereby enormously reducing operating cost.  ... 
doi:10.9734/jerr/2019/v9i117005 fatcat:a52aisnlrnezpaxymxvj4nlvam

Diagnostic methods of a bladed disc mode shape evaluation used for shrouded blades in steam turbines

Jaromir Strnad, Jindrich Liska
2015 Journal of Physics, Conference Series  
These methods are developed as parts of the noncontact vibration monitoring system of the steam turbine shrouded blades.  ...  The methods for bladed disc mode shape evaluation were successfully verified on the signals, which were obtained during the commission operation of the turbine.  ...  problems on the field of steam turbine troubleshooting.  ... 
doi:10.1088/1742-6596/659/1/012051 fatcat:5fryiyhe3zegpmywc2mwcjki34

Polish aspects in the modern design solutions of steam turbine flow systems

Andrzej Gardzilewicz, Dariusz Obrzut, Mariusz Szymaniak
2009 Polish Maritime Research  
Fig. 2 Comparison of rotor blade ring cascades: a) conventional and b) highly loaded, acc. [2].  ...  The structures, elaborated in Poland, were designed with the use of the authors' original computational software and verified by measurements performed on real turbine sets.  ...  The calculations dealt with single ring of guide vane and rotor blades for geometry and operational conditions appropriate for operation in heat power turbine.  ... 
doi:10.2478/v10012-008-0039-z fatcat:qsbzdesfzzcmbesx66qtmtpy2u

Turbomachinery Clearance Control [chapter]

Raymond E. Chupp, Robert C. Hendricks, Scott B. Lattime, Bruce M. Steinetz, Mahmut F. Aksit
2014 Turbine Aerodynamics, Heat Transfer, Materials, and Mechanics  
Coatings for Turbine Blades," University of Cambridge, at  ...  differences in thermal and structural characteristics, pressure gradient differences, and blade rub interfaces.  ...  Sealing in Gas and Steam Turbines A. Clearance Control Characteristics due to their high strength and low density.  ... 
doi:10.2514/5.9781624102660.0061.0188 fatcat:kzbiax6txfabjczdeubmrulxni

Mechanisms of Water Droplets Deposition on Turbine Blade Surfaces and Erosion Wear Effects

G. Ilieva
2017 Journal of Applied Fluid Mechanics  
in last stages of condensation turbines and prolong the reliability of blades operated in wet steam conditions  ...  Failure of turbine blades leads to various exploitation problems, efficiency decrease and economical losses, at all.  ...  turbines and to prolong the life cycle of blades operated in wet steam conditions. are given results of a comparative study on erosion of turbine blades with and without special coatings.  ... 
doi:10.18869/acadpub.jafm.73.239.26208 fatcat:jiflsw5gbrcvnmgaosaxe6srnm

Similarity Theory Based Radial Turbine Performance and Loss Mechanism Comparison between R245fa and Air for Heavy-Duty Diesel Engine Organic Rankine Cycles

Lei Zhang, Weilin Zhuge, Yangjun Zhang, Tao Chen
2017 Entropy  
Larger specific heat ratio of air leads to air turbine operating at higher pressure ratios.  ...  This paper numerically simulated a radial turbine under similar conditions between R245fa and air, and compared the differences of the turbine performance and loss mechanisms.  ...  rate per unit volume on the hub (10% span), midspan (50% span) and shroud (90% shroud) blade-to-blade surfaces of stationary and rotating domain in the nominal and off-design conditions.  ... 
doi:10.3390/e19010025 fatcat:gkgonuhz6vcwdjmtgh5brh6wuu

Improvement of the technology of welding high-temperature diaphragms in steam turbine flow section

A.K. Tsaryuk, V.Yu. Skulsky, M.A. Nimko, A.N. Gubsky, A.V. Vavilov, A.G. Kantor
2016 The Paton Welding Journal  
the NAS of Ukraine «Problems of residual life and safe operation of structures, constructions and machines» (2013-2015).  ...  Proceeding from the data of measurement of metal hardness in welds and HAZ of welded joints and weld metal impact toughness, an optimum mode of heat treatment of 15Kh12VNMF + 15Kh1M1FL steel welded joints  ...  Stationary steam turbines can contain a considerable number of stages (up to 20) and the same number of diaphragms of different type size, respectively.  ... 
doi:10.15407/tpwj2016.03.05 fatcat:royr6rvcvreczkaq7ooe4zarrm

Development of Titanium 3600rpm-50inch and 3000rpm-60inch Last Stage Blades for Steam Turbines

Shigeki Senoo, Hideki Ono, Takanori Shibata, Susumu Nakano, Yutaka Yamashita, Kunio Asai, Kazuya Sakakibara, Hideo Yoda, Takeshi Kudo
2014 International journal of gas turbine, propulsion and power systems  
Reduced exhaust loss by an increase in the exhaust annulus area improves the thermal efficiency of steam turbines, such as 1000MW-class turbines.  ...  To cut this loss, the 3600rpm-50inch and 3000rpm-60inch last stage blades have been developed, getting one of the world's largest exhaust annulus areas in the turbines.  ...  ACKNOWLEDGEMENT This research was supported in part by a grant from the Department of Aeronautics and Astronautics of Kyushu University.  ... 
doi:10.38036/jgpp.6.2_9 fatcat:gnlrsaio5fhi7d4osg6sp3gsne

18:1 pressure ratio axial/centrifugal compressor demonstration program

J. K. SCHWEITZER, J. W. FAIRBANKS
1983 Journal of Aircraft  
and steam turbines.  ...  The ball bearing retainer can be moved axially to adjust the position of the compressor rotor relative to the cases and provide active control of the impeller-to-shroud tip clearance.  ... 
doi:10.2514/3.44885 fatcat:e5ydxvnxmnhbth6brj4wiodu5u

Fast Traveling Pneumatic Probes for Turbomachinery Applications

Christoph Br¨uggemann, Lukas Badum, Maximilian Bauer, Markus Schatz, Damian M. Vogt
2020 International journal of gas turbine, propulsion and power systems  
For this purpose, tests have been performed in an axial diffuser test rig operated with air and a low pressure steam turbine.  ...  The conventional method to measure a flow passage velocity or pressure field is to move the probe to discrete positions and to hold a certain settling time before valid data can be recorded.  ...  ACKNOWLEDGMENTS The authors are grateful to the ITSM lab staff for their support in preparing the tests and operating the turbine and to Simon Lux for implementing the continuous traveling method.  ... 
doi:10.38036/jgpp.11.2_9 fatcat:obbbwjzqljafjar74kdisjirla

Basic Aspects of Gas Turbine Heat Transfer [chapter]

Shailendra Naik
2017 Heat Exchangers - Design, Experiment and Simulation  
The use of gas turbines for power generation and electricity production in both single cycle and combined cycle plant operation is extensive and will continue to globally grow into the future.  ...  In this chapter, issues related to the thermal design of gas turbine blades are highlighted and several heat transfer technologies are examined, such as convective cooling, impingement cooling, film cooling  ...  Thermodynamically, the gas turbine operates in a Brayton cycle, whereas the steam turbine operates in a Rankine cycle.  ... 
doi:10.5772/67323 fatcat:xhgf62sp6nemdlvnotblrfofqm
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