Fatigue reliability of gas turbine engine structures ... grant NGT-51053

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Published by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, VA .

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  • Fatigue life.,
  • Reliability.,
  • Gas turbine engines.,
  • Examination.,
  • Technologies.

Edition Notes

Book details

StatementThomas A. Cruse, Sankaran Mahadevan, and Robert G. Tryon.
Series[NASA contractor report] -- NASA CR--97-206215., NASA contractor report -- NASA CR-206215.
ContributionsMahadevan, Sankaran., Tryon, Robert G., Lewis Research Center.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL15491650M

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FATIGUE RELIABILITY OF GAS TURBINE ENGINE STRUCTURES Thomas A. Cruse, Sankaran Mahadevan, and Robert G. Tryon Vanderbilt University, Nashville, Tennessee Abstract The results of an investigation are described for fatigue reliability in engine structures.

The description consists of two parts. Part I is for method development. Part II is a File Size: 2MB. A probability-based procedure has been developed to predict the reliability of gas turbine engine blades subjected to high cycle fatigue.

The procedure provides a systemic approach for predicting and designing turbomachinery blading reliability against various potential high cycle fatigue problems for all relevant vibratory modes, and taking into account variability in geometry (e.g Cited by: fatigue and fracture reliability of gas turbine engine structures.

These include crack initiation and crack growth models, non-destructive evaluation, probabilistic risk assessment etc. Get this from a library. Fatigue reliability of gas turbine engine structures: grant NGT [Thomas A Cruse; Sankaran Mahadevan; Robert G Tryon; Lewis Research Center.].

This paper describes the creep-fatigue, fatigue and creep rupture properties of advanced steel (FR) at high temperature. FR steel showed excellent creep-fatigue lives which were superior at longer strain hold time conditions compared with conventional typestainless steels.

High-cycle fatigue (HCF) is arguably one of the costliest sources of in-service damage in military aircraft engines. Fatigue reliability of gas turbine engine structures book HCF of turbine blades and disks can pose a significant engine risk because fatigue failure can result from resonant vibratory stresses sustained over a relatively short by: 7.

The results of an investigation are described for fatigue reliability in engine structures. The description consists of two parts. Part 1 is for method development. Part 2 is a specific case study.

In Part 1, the essential concepts and practical approaches to damage tolerance design in. Probabilistic risk and fatigue life prediction of gas turbine engine fracture critical components requires estimates of the applied stress and temperature values throughout the life of the component.

These values are highly dependent upon the mission type and may vary from flight to Author: Michael P. Enright, Jonathan P. Moody, Ramesh Chandra, Alan C. Pentz. To validate our model, reliability assessment was conducted on a turbine disk in turbo-shaft engine, where the coupling failure including low cycle fatigue and creep-fatigue was considered.

This method can be an effective tool in the evaluation of reliability analysis involving multiple failure modes. A bevel pinion of a gas turbine engine failed during an endurance test. There were damages to the other components in the assembly, namely, the pinion housing, quill shaft, cover plate, etc.

These distressed components were examined thoroughly to find out the reason for the failure. Sankaran Mahadevan - Publications Textbooks.

Haldar, A., and S. Mahadevan, Probability, Reliability, and Statistical Methods in Engineering Design, John Wiley and Sons, (textbook for senior undergraduates and first year graduate students).

Publisher Summary. Centrifugal compressors are used in small gas turbines and are the driven units in most gas turbine compressor trains. They are an integral part of the petrochemical industry, finding extensive use because of their smooth operation, large tolerance of process fluctuations, and their higher reliability compared to other types of compressors.

“Reliability of Welded Structures Containing Heat Affected Zones”, ASME Journal of Offshore Mechanics and Arctic Engineering, Vol, pp M-H.

Shen, (). “Reliability High Cycle Fatigue Design of Gas Turbine Blades Using the Probabilistic Goodman Diagram”, International Journal of Fatigue, Vol.

21, No.7, pp. The largest single cause of component failures in modern military aircraft gas turbine engines is high cycle fatigue (HCF), exceeding the number attributed to low cycle fatigue, corrosion, overstress, manufacturing processes, mechanical damage, and materials.

The HCF problem is a pervasive one, affecting all engine sections and a wide range of materials. In addition to the impact on Cited by: A methodology is developed and applied that determines the sensitivities of the probability-of-fracture of a gas turbine disk fatigue analysis with respect to the parameters of the probability distributions describing the random variables.

The disk material is subject to initial anomalies, in either low- or high-frequency quantities, such that commonly used materials (titanium, nickel, powder Cited by: In: Fatigue –Fatigue & Durability Assessment of Materials, Composites and Structures.

Proceedings of the Fourth International Conference of the Engineering Integrity Society, Cambridge,15– 2. Golden PJ, Naboulsi S.

Hybrid contact stress analysis of a turbine engine blade to disk attachment. Int J Fatigue ;– 3. FUNDAMENTALS OF GAS TURBINE ENGINES INTRODUCTION The gas turbine is an internal combustion engine that uses air as the working fluid.

The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid (air) to drive the engine and propeller, which, in turn, propel the airplane.

parts of gas turbine engines for aircrafts is to achieve a minimum mass while meeting the requirements of strength reliability and durability.

The problem of increasing weight efficiency can be solved using optimal design of structures by dint of modern optimization methods, and further manufacture of such structures isFile Size: 1MB.

Finite Element Analysis for Turbine Blades with of a second stage blade in a gas turbine engine. Eng Fail Anal These results show that SPA is very apt for the fatigue reliability analysis. “Reliability Fatigue Design of Turbine Blades”, FAA/USAF workshop on Application of Probabilistic Design Methodologies to Gas Turbine Rotating Component.

Lanning, M.-H. Shen (). “Fatigue Reliability of Structures Containing Short Cracks”, 16th International Conference on. Shun-Peng Zhu, Hong-Zhong Huang, Weiwen Peng, Hai-Kun Wang and Sankaran Mahadevan, Probabilistic Physics of Failure-based framework for fatigue life prediction of aircraft gas turbine discs under uncertainty, Reliability Engineering & System Safety,(1), ().Cited by: Aircraft gas turbines 7 Gas turbine components 8 2 Fundamental Gas Turbine Cycle Thermodynamics 19 Reversible cycles with ideal gases 19 Constant pressure or Brayton cycle 19 Ideal inter-cooled and reheat cycles 25 Actual gas turbine cycles 34 List of terms and symbols used 43 3 Gas Turbine Components 45File Size: 1MB.

Proceedings of Fatigue, Durability and Fracture Mechanics. Editors: Seetharamu, S., Rao, K Bhanu Sankara, Khare, Raghunath Wasudev (Eds.) Buy this book eBook ,59 € price for Spain (gross) Buy eBook ISBN Fatigue Design Review of Offshore Wind Turbine Generator Structures – Task 6 Final Report vii LIST OF FIGURES Figure Ice-Structure Interaction for the LOLEIF Lighthouse in the Gulf of Bothnia (by M.

Gas turbines are available in sizes ranging from kilowatts (kW) to megawatts (MW).Gas turbines can be used in power-only generation or in combined heat and power (CHP) systems. The most efficient commercial technology for central station power-only generation is the gas turbine-steam turbinecombined-cycle plant, with efficiencies approaching 60 percent lower heating value (LHV) @article{osti_, title = {Case histories involving fatigue and fracture mechanics; Proceedings of the Symposium, Charleston, SC, Mar.

21, 22, }, author = {Hudson, C.M. and Rich, T.P.}, abstractNote = {Papers are presented on cracking at nozzle corners in the nuclear pressure vessel industry, applied fracture mechanics for assessing defect significance in a crude oil pipeline, failure. The gas turbine is a power plant that produces a great amount of energy for its size and weight and thus has found increasing service in the past 20 years in the petrochemical industry and utilities throughout the world.

The gas turbine's compactness, weight, and multiple fuel applications make it a natural power plant for offshore second edition is not only an updating of 4/5(3). energies Article Fatigue Reliability Analysis of Wind Turbine Cast Components Hesam Mirzaei Rafsanjani 1,*, John Dalsgaard Sørensen 1, Søren Fæster 2 and Asger Sturlason 3 1 Department of Civil Engineering, Aalborg University, Aalborg Ø, Denmark; [email protected] 2 Department of Wind Energy, Technical University Denmark, Roskilde, Denmark; [email protected] content.

This hot gas is allowed to expand through the turbine where the energy in the gas is converted to a rotation of the turbine shaft. The turbine shaft powers both the compressor and a generator used to obtain electrical power from the gas turbine. Fig A simple gas turbine. Turbine Blade Super alloys were developed since theFile Size: KB.

Topics: Ductility, Fatigue, Fatigue strength, High cycle fatigue, Turbines, Fracture toughness, Fatigue life, Stress, Aluminum, Approximation Deformation Modeling and Lifetime Prediction of Ni-Base Gas Turbine Blade Alloys Under TMF-Conditions.

/ Reliability Assessment and Reliability-Based Inspection and Maintenance of Offshore lower FDF values are obtained for offshore wind turbines than for oil & gas structures and reduced FDF values are obtained when inspections are taken into account.

keywords = "Offshore Wind Turbine, Fatigue assessment of Reliability, Risk-based Cited by: 5. compressor driven by a gas generator turbine with a separate power turbine (two shaft engine, Figure 2) or of an air compressor and a turbine on one shaft, where the turbine provides both power for the air compressor and the load (single shaft engine, Figure 2).

The power and efficiency characteristics of. A one-step resource, the book demonstrates the latest technology, how others have used it to increase their competitiveness, and how you can use it to do the book makes the case for accurate assessment of the reliability of engineering systems, simple, complex, or large-scale.

The reliability of aero engine has a direct impact on the flight safety of the whole plane. With the continuous improvement of performance requirements of aero engines, the related fatigue and reliability problems also appear.

For the fatigue failure characteristics of the typical component (compressor disk) in an aero engine, the fatigue reliability of its multi-site damage structure in. The assessment of fatigue life of gas turbine engines or steam-gas rotors requires follow-up of main stages [1, 2]: 1) The calculation of static stress.

Calculation of natural frequencies and mode shapes, taking into account the rotation, uneven heating and gas forces. Their adjustment takes into account a mistuning [3, 4,15]. (high cycle fatigue) When a crack gets large enough, the centrifugal force can pull blade apart (liberation) Foreign Object Damage (FOD): Debris gets sucked in and damages blades Rubs A liberation could cause significant secondary damage -> millions of dollars example stress regions continuous vibration –flutter, resonances typical gas turbine.

This book is intended to provide valuable information for the analysis and design of various gas turbine engines for different applications.

The target audience for this book is design, maintenance, materials, aerospace and mechanical engineers. The design and maintenance engineers in the gas turbine and aircraft industry will benefit immensely from the integration and system discussions in. Tryon RG, Cruse TA, Mahadevan S.

Development of a reliability-based fatigue life model for gas turbine engine structures. Engineering Fracture Mechanics ; – CrossRef Google ScholarCited by: The origin of loads in a gas turbine engine is discussed.

The major loads covered are those due to the engine cycle, rotational inertia, flight manoeuvre, precession, pressure, thermal gradient, torsion, seizure and blade release.

Engine Mounting and bearing loads are also included. Failure Criteria. Lecture 33 Turbine definition, types of turbines, comparison of gas turbine with reciprocating IC engine and steam turbine, classification of gas turbine 34 Lecture Thermodynamic cycle or Brayton cycle, problem solving 35 Lecture 35 Regenerative gas turbine cycle, reheat gas turbine cycle, problem solving.

SURFACE DAMAGE TOLERANCE ANALYSIS OF A GAS TURBINE ENGINE ROTOR Ahsan Jameel, Honeywell, Phoenix, AZ ABSTRACT DARWINTM (Design Assessment of Reliability With INspection) is a simulation-based computer program for probabilistic fatigue life prediction of rotors and disks in commercial aircraft jet engines.

This program is being.LOW CYCLE FATIGUE ANALYSIS OF GAS TURBINE BLADE 1, Dr.R. Asokan2 1&2 Aeronautical Engineering Department, Hindustan University, Chennai, India.

[email protected], [email protected] Abstract- Every startup and shutdown of gas turbine engine the turbine blades are subjected to high centrifugal force due to highFile Size: KB.VEXTEC Laboratory Group's Small Gas Turbine Testing provides a cost-effective way of emulating many of the failure modes or other phenomena experienced in full scale gas turbine engines.

By creating a similar operating environment, (high temperature and high rotating speeds), our patented rig greatly reduces test time and fuel burn by using scaled components and off the shelf JetCat PSX.

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