The concept of new-generation steam turbines for the coal power engineering of Russia. Part 2. Substantiating the long-term strength of the steam turbine’s high-temperature rotors

Kostyuk, A. G.; Грибин, В. Г.; Trukhnii, A. D.

doi:10.1134/s0040601511010095

Cited by 2 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Возбуждение лопаток обусловлено многими причинами, в числе главных взаимодействие между направляющими лопатками и рабочим колесом [3]. В настоящее время вычислительная гидродинамика (CFD) является самым распространенным методом для проведения анализа нестационарного потока турбины и исследования количественной оценки вибрационных откликов на основе прогнозирования аэродинамических сил возбуждения, действующих на рабочие колеса [4].…”

Section: Introductionunclassified

Mathematical Modeling and Study of the Influent Aerodynamic Loads on the Strength Characteristics of Turbine Blades

Repetckii,

Manh

2023

System Analysis &Amp; Mathematical Modeling

View full text Add to dashboard Cite

The working blades of the turbomachine are constantly subjected to periodic loads in time, for example, due to the unsteady interaction of the flow of successive rows of stator and rotor blades. It is almost impossible to avoid resonance in turbine blades, since the frequency band of the power excitation and the natural frequencies of the blade disk are broadband ranges and overlap ranges. Analysis of forced oscillations of the blade crown is an important part of the design of gas turbine engines. To analyze fatigue and predict the service life of a turbomachine blade, a history of the stressed load on the blade is required. However, a blade designed for safe operation at certain constant rotor speeds can be subjected to destructive loads during start-up and stop. During such operations, the blade experiences short-term resonant stresses when passing a critical value, which may be in the speed range through which the rotor accelerates. Fatigue due to these transient effects can accumulate and lead to failure. In this regard, the development of mathematical models of aerodynamic loads and application for solving problems of ensuring the vibrational reliability of the blade apparatus is an urgent task. This paper presents a methodology for assessing aerodynamic loads and fatigue damage when operating at variable speed. The transient resonant stresses for the blade were determined using a numerical procedure. The procedure for assessing fatigue damage is described. The fatigue fracture surface is formed on the S-N-mean stress axes, and the Goodman rule is used to assess fatigue accumulation.

show abstract

Section: Introductionunclassified

Mathematical Modeling and Study of the Influent Aerodynamic Loads on the Strength Characteristics of Turbine Blades

Repetckii,

Manh

2023

System Analysis &Amp; Mathematical Modeling

View full text Add to dashboard Cite

show abstract

“…State-of-the art steam-turbine power plant already operates with ultrasupercritical (USC) steam: main steam temperature to 610°C at a pressure of 29 MPa, reheat steam temperature up to 620°С at a pressure of 5.6 MPa. The attainable efficiency ratio for these units is about 45.6% [2,6,7].…”

Section: Introductionmentioning

confidence: 99%

A survey of state-of-the-art development of coal-fired steam turbine power plant based on advanced ultrasupercritical steam technology

Rogalev¹,

Golodnitskiy²,

Tumanovskiy³

et al. 2014

ces

View full text Add to dashboard Cite

This paper surveys the development of coal-fired power plant technology based on steam turbine generator units. It is shown that, over recent decades as well as 1808 Nikolay Rogalev et al. in the immediate future, development efforts in this area were and will be focused on improving thermal efficiency of the plant by boosting initial parameters of its working medium: main steam pressure and temperature as well as reheat steam temperature. Ultrasupercritical steam (with pressures ranging between 28 and 32 MPa and temperatures of 600 to 620°С) can be considered as a mature steam turbine generator technology, with plant efficiency factors of 45…46%. The transition to advanced ultrasupercritical steam (700 to 760°С, 35 to 40 MPa) is the next step in the development of coal-fired steam turbine power plant technology, one that makes efficiency of 50% attainable. This direction in the development of coal-fired power plant technology appears to be the most promising at present. State-of-the art developments in steam turbine power plant technology employing advanced ultrasupercritical (A-USC) steam with efficiency factors about 50% have been analyzed for the European Union, US, Japan and China. Covered in the paper are work programs and findings pertaining to development and studies of materials and structural members of high-temperature boiler sections and steam turbines, power plant designs with unit capacities up to 1100 MW, as well as economic and environmental aspects of A-USC steam power plant development. Information on project participants is provided.

show abstract

The concept of new-generation steam turbines for the coal power engineering of Russia. Part 2. Substantiating the long-term strength of the steam turbine’s high-temperature rotors

Cited by 2 publications

References 2 publications

Mathematical Modeling and Study of the Influent Aerodynamic Loads on the Strength Characteristics of Turbine Blades

Mathematical Modeling and Study of the Influent Aerodynamic Loads on the Strength Characteristics of Turbine Blades

A survey of state-of-the-art development of coal-fired steam turbine power plant based on advanced ultrasupercritical steam technology

Contact Info

Product

Resources

About