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Wyszukujesz frazę "high pressure rotor" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Approach to Impact Assessment of the Rated Power Uprate of NPP Unit on the Service Life of the Turbine Critical Elements
Autorzy:
Chernousenko, Olga
Nikulenkova, Tetyana
Peshko, Vitaliy
Nikulenkov, Anatolii
Powiązania:
https://bibliotekanauki.pl/articles/1811575.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
nuclear power plant
reliability
turbine
steam flow
computational fluid dynamics
high pressure rotor
service life
long-term strength
low cycle fatigue
Opis:
Nuclear power plants play an important role in power systems of many countries. Ability to reasonable increase installed capacity of nuclear power units allow to reduce the cost for building of new power plants. When increasing NPP capacity to 104% there is a need to estimate the residual life of plant’s typical elements and continue their operation. The mathematical model of estimation of service life indicators of steam turbine K-1000-60/3000 is developed. The effect of increasing the capacity of a nuclear reactor on the heat transfer coefficients of a steam in the nozzle segments of high-pressure cylinder was established by using CFD modeling. The thermal and stress-strain state of the high-pressure rotor for the most typical operating modes are calculated. Using the correlation dependences of low-cycle fatigue, the rate of accumulation of cyclic damage of the base metal is established. The resistance of the metal to the exhaustion of long-term strength is also determined. On the example of the high pressure rotor of the 3rd power unit of Rivne NPP the service life indicators are calculated. The validity of increasing the installed capacity of the power unit was also confirmed.
Źródło:
Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 1; 105-116
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of cooling air mass flux variation on the convective heat transfer coefficient of HPT rotor disk
Autorzy:
Domański, R.
Jedliński, K.
Powiązania:
https://bibliotekanauki.pl/articles/243193.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
CFD
Fluent
High Pressure Turbine
Rotor Disk
convective heat transfer coefficient
Opis:
The paper is focused on the convective heat transfer phenomena on the High Pressure Turbine (HPT) rotor disk wall. The disk is a part of PW6000 turbojet engine (designed by Pratt & Whitney Company) and is a base of the 1st stage of HPT blades having very high temperature (combustion gases leaving combustion chamber have temperature around 1800 K). The analyzed disk is cooled by the air taken from one of the compressor's stages. The air gets to the gap between HPT disk and mini disk through discrete pump holes and then divides into two streams. One of them is used to decrease temperature of turbine blades and the second one is directed to the sequent turbine stages. Numerical analysis (made in Fluent) is based on the two dimensional aerodynamic model (in steady state) which is the cross section of the real geometry. There are three different sets of boundary conditions analyzed. Each of them has the same flow splits (40% of air is used to cool turbine blades and 60% gets to the next turbine stage) and all settings except cooling air mass flow on the inlet. Convective heat transfer coefficients are calculated using different method then proposed by Fluent (WFHTC and SHTC options give wrong results in this case). Coefficients are presented along disk wall and are compared with Fluent calculation methods.
Źródło:
Journal of KONES; 2007, 14, 2; 107-114
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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