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A Reduced Model for Prediction of Thermal and Rotational Effects on Turbine Tip Clearance

A Reduced Model for Prediction of Thermal and Rotational Effects on Turbine Tip Clearance PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781726159180
Category :
Languages : en
Pages : 32

Book Description
This paper describes a dynamic model that was developed to predict changes in turbine tip clearance the radial distance between the end of a turbine blade and the abradable tip seal. The clearance is estimated by using a first principles approach to model the thermal and mechanical effects of engine operating conditions on the turbine sub-components. These effects are summed to determine the resulting clearance. The model is demonstrated via a ground idle to maximum power transient and a lapse-rate takeoff transient. Results show the model demonstrates the expected pinch point behavior. The paper concludes by identifying knowledge gaps and suggesting additional research to improve the model.Kypuros, Javier A. and Melcher, Kevin J.Glenn Research CenterSCALE MODELS; TEMPERATURE EFFECTS; TURBINE BLADES; MATHEMATICAL MODELS; DYNAMIC MODELS; CLEARANCES; BLADE TIPS; TURBINES; TAKEOFF; LAPSE RATE; IDENTIFYING; ESTIMATING...

A Reduced Model for Prediction of Thermal and Rotational Effects on Turbine Tip Clearance

A Reduced Model for Prediction of Thermal and Rotational Effects on Turbine Tip Clearance PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781726159180
Category :
Languages : en
Pages : 32

Book Description
This paper describes a dynamic model that was developed to predict changes in turbine tip clearance the radial distance between the end of a turbine blade and the abradable tip seal. The clearance is estimated by using a first principles approach to model the thermal and mechanical effects of engine operating conditions on the turbine sub-components. These effects are summed to determine the resulting clearance. The model is demonstrated via a ground idle to maximum power transient and a lapse-rate takeoff transient. Results show the model demonstrates the expected pinch point behavior. The paper concludes by identifying knowledge gaps and suggesting additional research to improve the model.Kypuros, Javier A. and Melcher, Kevin J.Glenn Research CenterSCALE MODELS; TEMPERATURE EFFECTS; TURBINE BLADES; MATHEMATICAL MODELS; DYNAMIC MODELS; CLEARANCES; BLADE TIPS; TURBINES; TAKEOFF; LAPSE RATE; IDENTIFYING; ESTIMATING...

A Reduced Model for Prediction of Thermal and Rotational Effects on Turbine Tip Clearance

A Reduced Model for Prediction of Thermal and Rotational Effects on Turbine Tip Clearance PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34

Book Description


2023 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2023) Proceedings

2023 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2023) Proceedings PDF Author: Song Fu
Publisher: Springer Nature
ISBN: 981974010X
Category :
Languages : en
Pages : 1991

Book Description


Advances in Machinery, Materials Science and Engineering Application IX

Advances in Machinery, Materials Science and Engineering Application IX PDF Author: M. Chen
Publisher: IOS Press
ISBN: 1643684396
Category : Technology & Engineering
Languages : en
Pages : 1172

Book Description
New engineering materials, techniques and applications are constantly being researched and developed, and keeping up to speed with the latest advances is crucial for engineers if they are to successfully address the challenges they face in their work. This book presents the selected proceedings of MMSE2023, the 9th International Conference on Advances in Machinery, Materials Science and Engineering Applications, jointly organized by the SAE-Supmeca, France and China University of Geosciences (Wuhan) and held on 22 and 23 July 2023 in Wuhan, China. For the past 12 years, this annual conference has collated recent advances and experiences, identified emerging trends and provided a platform for participants from academia and industry to exchange information and views, helping to address the world’s machinery and engineering challenges. The book contains 4 sections: mechanical engineering, material science and manufacturing technology; electrical engineering, automation and control; modeling, simulation and optimization techniques in engineering; and advanced engineering technologies and applications. A total of 241 submissions were received for MMSE2023, of which 151 papers were selected for the conference and for publication by means of a rigorous international peer-review process. These papers present exciting ideas and methods that will open novel research directions for different communities. Offering a current overview of the latest research and applications in machinery and materials-science engineering, the book will be of interest to all those working in the field.

Research & Technology 2003

Research & Technology 2003 PDF Author:
Publisher: DIANE Publishing
ISBN: 1428918191
Category :
Languages : en
Pages : 264

Book Description


41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 10-13 July 2005, Tucson, Arizona: 05-4000 - 05-4049

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 10-13 July 2005, Tucson, Arizona: 05-4000 - 05-4049 PDF Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 552

Book Description


40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 11-14, 2004, Fort Lauderdale, FL.: 04-4150 - 04-4199

40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 11-14, 2004, Fort Lauderdale, FL.: 04-4150 - 04-4199 PDF Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 494

Book Description


Gas Turbine Blade Cooling

Gas Turbine Blade Cooling PDF Author: Chaitanya D Ghodke
Publisher: SAE International
ISBN: 0768095026
Category : Technology & Engineering
Languages : en
Pages : 238

Book Description
Gas turbines play an extremely important role in fulfilling a variety of power needs and are mainly used for power generation and propulsion applications. The performance and efficiency of gas turbine engines are to a large extent dependent on turbine rotor inlet temperatures: typically, the hotter the better. In gas turbines, the combustion temperature and the fuel efficiency are limited by the heat transfer properties of the turbine blades. However, in pushing the limits of hot gas temperatures while preventing the melting of blade components in high-pressure turbines, the use of effective cooling technologies is critical. Increasing the turbine inlet temperature also increases heat transferred to the turbine blade, and it is possible that the operating temperature could reach far above permissible metal temperature. In such cases, insufficient cooling of turbine blades results in excessive thermal stress on the blades causing premature blade failure. This may bring hazards to the engine's safe operation. Gas Turbine Blade Cooling, edited by Dr. Chaitanya D. Ghodke, offers 10 handpicked SAE International's technical papers, which identify key aspects of turbine blade cooling and help readers understand how this process can improve the performance of turbine hardware.

Gas Turbine Heat Transfer and Cooling Technology, Second Edition

Gas Turbine Heat Transfer and Cooling Technology, Second Edition PDF Author: Je-Chin Han
Publisher: CRC Press
ISBN: 1439855684
Category : Science
Languages : en
Pages : 892

Book Description
A comprehensive reference for engineers and researchers, Gas Turbine Heat Transfer and Cooling Technology, Second Edition has been completely revised and updated to reflect advances in the field made during the past ten years. The second edition retains the format that made the first edition so popular and adds new information mainly based on selected published papers in the open literature. See What’s New in the Second Edition: State-of-the-art cooling technologies such as advanced turbine blade film cooling and internal cooling Modern experimental methods for gas turbine heat transfer and cooling research Advanced computational models for gas turbine heat transfer and cooling performance predictions Suggestions for future research in this critical technology The book discusses the need for turbine cooling, gas turbine heat-transfer problems, and cooling methodology and covers turbine rotor and stator heat-transfer issues, including endwall and blade tip regions under engine conditions, as well as under simulated engine conditions. It then examines turbine rotor and stator blade film cooling and discusses the unsteady high free-stream turbulence effect on simulated cascade airfoils. From here, the book explores impingement cooling, rib-turbulent cooling, pin-fin cooling, and compound and new cooling techniques. It also highlights the effect of rotation on rotor coolant passage heat transfer. Coverage of experimental methods includes heat-transfer and mass-transfer techniques, liquid crystal thermography, optical techniques, as well as flow and thermal measurement techniques. The book concludes with discussions of governing equations and turbulence models and their applications for predicting turbine blade heat transfer and film cooling, and turbine blade internal cooling.

Axial Turbine Aerodynamics for Aero-engines

Axial Turbine Aerodynamics for Aero-engines PDF Author: Zhengping Zou
Publisher: Springer
ISBN: 9811057508
Category : Technology & Engineering
Languages : en
Pages : 572

Book Description
This book is a monograph on aerodynamics of aero-engine gas turbines focusing on the new progresses on flow mechanism and design methods in the recent 20 years. Starting with basic principles in aerodynamics and thermodynamics, this book systematically expounds the recent research on mechanisms of flows in axial gas turbines, including high pressure and low pressure turbines, inter-turbine ducts and turbine rear frame ducts, and introduces the classical and innovative numerical evaluation methods in different dimensions. This book also summarizes the latest research achievements in the field of gas turbine aerodynamic design and flow control, and the multidisciplinary conjugate problems involved with gas turbines. This book should be helpful for scientific and technical staffs, college teachers, graduate students, and senior college students, who are involved in research and design of gas turbines.