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Wyszukujesz frazę "gazo-turbinowe silniki" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
The new devices of gas-turbine engines of ground transport on the basis cascade pressure exchanger of krajniuk
Autorzy:
Krajniuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/374815.pdf
Data publikacji:
2011
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
kaskadowa wymiana ciśnienia
gazo-turbinowe silniki
cykl pracy
energooszczędność
wydajność
cascade pressure exchange
gas turbine engines
working cycle
power efficiency
performance
self-cooling
Opis:
Main trends of perfection of gas-turbine engines (GTE) of transport plants by application of principles of the cascade pressure exchange (CPE) for air compression in the working cycle of gas-turbine plant have been analyzed. The principle of action and performances of work of heat compressor CPE realizing compression of working body on the whole at the expense straight convert inputting heat in disposing work of torrent with insignificant distraction mechanics work from shaft selection of power has been described. The results of computational investigation of four variants of the GTE working process organization on the basis of the two-staged compression assembly with intermediate cooling and heating of air-gas medium have been adduced. Application of units CPE in the capacity of compressing stage GTE opens the prospect of adaptations GTE performance by conditions of work in the capacity of forcing units of overland transport.
Źródło:
Transport Problems; 2011, 6, 2; 107-119
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On-board vibration diagnostics of shaft damage of the aviation engine
Autorzy:
Pavolvskyi, O.
Bouraou, N.
Powiązania:
https://bibliotekanauki.pl/articles/128301.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
gas turbine engines
cracked shaft
vibration diagnosis
digital tracking narrow-band filter
silniki gazo-turbinowe
pęknięcie wału
diagnostyka drganiowa
filtr wąskopasmowy
Opis:
This work is devoted to the further researches and development a new on-board multilevel vibration control system of aviation gas-turbine engines (GTE). We propose to introduce new diagnosis level (subsystem) into development multilevel vibration control system for detection of the initial crack-like damage of rotor shaft. The proposed subsystem works at the non-steady-state modes of GTE, for example during startup at the acceleration to operating speed. The basis of this approach is the fact of the occurrence of sub harmonic resonances of accelerating cracked shaft response. It is necessary to extract the main rotor harmonic vibration at the nonsteady-state mode for crack diagnosis in practice. The narrow-band digital tracking filter is carried out for this aim, the central frequency of pass band is changing according the rotor rotation frequency. The efficiency of the proposed subsystem is demonstrated by the results of computer simulation.
Źródło:
Vibrations in Physical Systems; 2014, 26; 229-234
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of the vibration diagnostics of rotation shaft damage based on fractal analysis
Autorzy:
Bouraou, N.
Pavlovskyi, O.
Pazdrii, O.
Powiązania:
https://bibliotekanauki.pl/articles/128311.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
gas-turbine engine
cracked shaft
vibration diagnosis
fractal analysis
Hurst exponent
silniki gazo-turbinowe
pęknięcie wału
diagnostyka wibracyjna
analiza fraktalna
wykładnik Hursta
Opis:
This work is devoted to further research and improvement of the vibration diagnostics of the initial crack-like damage of rotation shaft in aviation gas-turbine engines (GTE). We propose to use fractal analysis of the accelerating shaft response in order to increase the damage detection efficiency. Responses of the accelerating shaft are derived by using simulation in absence and in presence of the initial traverse crack. The responses of the cracked shaft have sub-critical peaks; the increase in size of a crack leads to the increase in peak values of the vibration amplitude in the range of sub-harmonic resonances. The Hurst exponent is obtained for the time series in the range of sub-harmonic resonances. The research shows that a small change in the crack size results in considerable change of the Hurst exponent, which allows to detect the mentioned sub-harmonic resonances of the measured signal in order to identify the initial crack-like damage of the rotation shaft.
Źródło:
Vibrations in Physical Systems; 2016, 27; 61-66
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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