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Numerical Investigation on the Dynamic Characteristics of an Adjustable Power Turbine Used in Environmental Control System

Qihang Lu, Qi Zhang, Dalin Zhang, Zhihan Lv
2020 Complexity  
In this paper, the environmental control system of aircraft driven by a power turbine is further analyzed.  ...  It is analyzed quantitatively that adjusting the adjustable nozzle ring can keep the output power stable, widen the flight envelope, and improve the stability of the environmental control system.  ...  Acknowledgments is work was supported by the corresponding author Dalin Zhang.  ... 
doi:10.1155/2020/7916936 fatcat:bbyqhlicnre2hmty77ewopidpq

Experimental Investigation of the Reynolds Number'S Effect on the Aerodynamic Characteristics of a Horizontal Axis Wind Turbine of the Göttingen 188 Airfoil Type

Zied Driss, Sarhan Karray, Ali Damak, Mohamed Salah Abid
2013 American Journal of Mechanical Engineering  
To achieve this, an open wind tunnel has been used to determine the global characteristics of the wind turbine.  ...  In this paper, a study of the effect of Reynolds number on the aerodynamic characteristics of a horizontal axis wind turbine equipped by three adjustable blades of the Göttingen 188 airfoil has been developed  ...  Conclusion In this paper, an experimental investigation has been developed to study the Reynolds numbers effect on the global characteristics of the horizontal axis wind turbine equipped by three adjustable  ... 
doi:10.12691/ajme-1-5-7 fatcat:6xuiqfw53zcdnikmqynvvh3uie

General model for representing variable speed wind turbines in power system dynamics simulations

J.G. Slootweg, S.W.H. de Haan, H. Polinder, W.L. Kling
2003 IEEE Transactions on Power Systems  
In this contribution, a model that can be used to represent all types of variable speed wind turbines in power system dynamics simulations is presented.  ...  A tendency to erect ever more wind turbines can be observed in order to reduce the environmental consequences of electric power generation.  ...  Laskowski from PTI, Schenectady, NY, is acknowledged for his valuable help in interfacing the wind turbine model with PSS/E.  ... 
doi:10.1109/tpwrs.2002.807113 fatcat:6q4o5bdojjgafijndjk3sivtoe

General Model for Representing Variable-Speed Wind Turbines in Power System Dynamics Simulations

J. G. Slootweg, S. W. H. De Haan, H. Polinder, W. L. Kling
2002 IEEE Power Engineering Review  
In this contribution, a model that can be used to represent all types of variable speed wind turbines in power system dynamics simulations is presented.  ...  A tendency to erect ever more wind turbines can be observed in order to reduce the environmental consequences of electric power generation.  ...  Laskowski from PTI, Schenectady, NY, is acknowledged for his valuable help in interfacing the wind turbine model with PSS/E.  ... 
doi:10.1109/mper.2002.4311816 fatcat:gkcafcoekre4zoxhc5wcuyg3je

Oil-free bearing development for high-speed turbomachinery in distributed energy systems – dynamic and environmental evaluation

Eliza Tkacz, Dorota Kozanecka, Zbigniew Kozanecki, Jakub Łagodziński
2015 Open Engineering  
AbstractModern distributed energy systems, which are used to provide an alternative to or an enhancement of traditional electric power systems, require small size highspeed rotor turbomachinery to be developed  ...  of oil-free bearing technology for highspeed turbomachinery; are described in the paper.  ...  The numerical model used for rotor-dynamic calculations is shown in Fig. 6 .  ... 
doi:10.1515/eng-2015-0044 fatcat:3peu4qucpbazvah7bwyz2plzd4

Accelerating transient dynamics: Targetet modal interaction

F. Dohnal
2019 Hungarian Agricultural Engineering  
A concept for attacking vibrations in mechanical systems is outlined based on time-periodic modulation of a physical parameter in the system.  ...  This concept can be applied in parallel to existing controls and allows the artificial increase of damping transient dynamics.  ...  A modern concept for attacking vibrations in mechanical systems is outlined that can be used in parallel to existing controls and allows the artificial increase of damping transient dynamics [4] .  ... 
doi:10.17676/hae.2019.36.5 fatcat:b7kt3kx2ljbixasis3642q5obe

System Identification And Performance Improvement To A Micro Gas Turbine Applying Biogas

Chun Hsiang Yang, Cheng Chia Lee, Chiun Hsun Chen
2009 Zenodo  
In this study, the effects of biogas fuels on the performance of an annular micro gas turbine (MGT) were assessed experimentally and numerically.  ...  Following the experiments, the measured data helped us identify the parameters of dynamic model in numerical simulation.  ...  ACKNOWLEDGEMENT The authors would like to thank the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract No. NSC 96-2218-E-009-002  ... 
doi:10.5281/zenodo.1329491 fatcat:2wludfbsvfeepb6zt7powkmcve

Analysis of the combustion oscillation in a silo-type gas turbine combustor and its suppression

Seok Bin Seo, Dal Hong Ahn, Jong Ho Park, Dong Jin Cha
2012 Journal of Mechanical Science and Technology  
The characteristics of combustion oscillation of a silo-type 79.5 MW gas turbine combustor in commercial operation and its suppression have been investigated.  ...  An FFT analysis of the combustion dynamics showed that the dominant frequency of the oscillation would be that of the 1st longitudinal acoustic resonance mode of the combustor.  ...  Fig. 4 shows a schematic of the system used in this study to measure the combustion dynamics occurring in the silo-type gas turbine combustor of interest.  ... 
doi:10.1007/s12206-012-0205-1 fatcat:xd2lh2eq2zekff7s3q2izamvfm

Modeling and Numerical Simulation of a Vertical Axis Wind Turbine Having Cavity Vanes

Kadhim Suffer, Ryspek Usubamatov, Ghulam Quadir, Khairul Ismail
2014 2014 5th International Conference on Intelligent Systems, Modelling and Simulation  
The main goal of this current research is to investigate numerically the aerodynamic performance of a newly designed cavity type vertical axis wind turbine.  ...  For numerical investigation, commercially available computational fluid dynamic CFD software GAMBIT and FLUENT were used.  ...  [13] presented an experimental and numerical aerodynamic analysis of Savonius VAWT using the Dynamic Mesh Method (DMM) which allows moving bodies and adjusts the mesh according to the loads acting on  ... 
doi:10.1109/isms.2014.88 fatcat:3rmnyhshenhcrearunoejeoclm

Optimal Output Vector Feedback Control Strategy for Wind Power Systems

Shahida Khatoon, Ibraheem Nasiruddin, Reshma Ehtesham, Ramesh C. Bansal
2015 Electric power components and systems  
The investigations of the results obtained reveal that the reduction in system states used for feedback has resulted in degradation of system dynamic performance.  ...  This article presents the design of optimal output feedback controllers to enhance the dynamic performance of wind turbine generator supplying an infinite bus through transmission line.  ...  In view of above discussions, it has been observed that wind power plants are gaining momentum worldwide among the renewable source based power plants due to their numerous environmental, technical, and  ... 
doi:10.1080/15325008.2015.1022910 fatcat:ngtb2cxjjnbjdej4pplahpzn3q

Research focuses and advance technologies of smart grid in recent years

ShengWei Mei, LaiJun Chen
2012 Chinese Science Bulletin  
security, power system stability, energy storage system, high temperature superconductivity  ...  In this paper, the latest progress of some research focuses and advance technologies in the development of smart grid is reviewed. smart grid, renewable energy integration, low carbon electricity, cyber-physical  ...  The environmental impact of power generating systems was investigated in the scope of life cycle inventory analysis based on the matrix method [20] .  ... 
doi:10.1007/s11434-012-5261-5 fatcat:4mvfwu7fjfclxotlftdxuuzpbi

Development and validation of a coupled numerical model for offshore floating multi-purpose platforms

Liang Li, Maurizio Collu, Yan Gao, Carlo Ruzzo, Felice Arena, Federico Taruffi, Sara Muggiasca, Marco Belloli
2020 Zenodo  
A multi-purpose platform (MPP) is an offshore system designed to serve the purposes of more than one off-shore industry.  ...  The aim here is to develop and validate a coupled aero-hydro-servo-elastic numerical model, which will be used to predict the dynamic response of the MPP under a wide range of environmental condi-tions  ...  The European Commission is also not liable for any use that may be made of the information contained herein.  ... 
doi:10.5281/zenodo.4472751 fatcat:v5unkdro7zfzhl46jrfo7u32du

New perspectives in offshore wind energy

G. Failla, F. Arena
2015 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
The design of offshore wind turbines is one of the most fascinating challenges in renewable energy.  ...  The purpose of this theme issue is to offer a broad perspective on some crucial aspects of offshore wind turbines design, discussing the state of the art and presenting recent theoretical and experimental  ...  [62] investigate the use of multiple tuned liquid column dampers (MTLCDs) for dynamic response mitigation in floating wind turbines.  ... 
doi:10.1098/rsta.2014.0228 pmid:25583869 pmcid:PMC4290411 fatcat:kjtqde3aq5hplnkrx6kfrqr5ra

Review of Experimental-Numerical Methodologies and Challenges for Floating Offshore Wind Turbines

Peng Chen, Jiahao Chen, Zhiqiang Hu
2020 Journal of Marine Science and Application  
Due to the dissimilar scaling issues, the conventional experimental method of FOWTs can hardly be used directly to validate the full-scale global dynamic responses accurately.  ...  Several key challenges in the conventional basin experiment issues are discussed, including scaling issues; coupling effects between aero-hydro and structural dynamic responses; blade pitch control strategies  ...  In their experiment, an actuation system combined numerical wind turbine model was set to simulate the thrust force by winch and cables, pulling fore and aft on the nacelle.  ... 
doi:10.1007/s11804-020-00165-z fatcat:ue7n54oe3vacvdalhnibbufavy

Characteristic Curve Prediction of a Commercial Centrifugal Pump Operating as a Turbine Through Numerical Simulations

Diego Penagos Vásquez, Jonathan Graciano Uribe, Sebastián Vélez García, Jorge Sierra del Rio
2021 Journal of Advanced Research in Fluid Mechanics and Thermal Sciences  
In this work, we seek to predict the characteristic curve of a commercial centrifugal radial flow pump operating as a turbine, applying a novel methodology based on the state of the art.  ...  Subsequently, the characteristic curve is generated in turbine mode, obtaining an error of less than 10% respect to mathematical model.  ...  (SeCADD-ProM) and the system department of the Metropolitan Technological Institute (ITM), for allowing the use of the computer equipment and licenses of the Ansys® software to perform the simulations  ... 
doi:10.37934/arfmts.83.1.153169 fatcat:fuylyhzfp5f3fp7366uaqw5jye
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