PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników
Powiadomienia systemowe
  • Sesja wygasła!
  • Sesja wygasła!
  • Sesja wygasła!
  • Sesja wygasła!
  • Sesja wygasła!

Znaleziono wyników: 10

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  two-stage turbine
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote Stator-to-Stator and Rotor-to-Rotor Clocking Measurements in a Two-Stage Low-Pressure Model Turbine
Świderek M., Błaszczak J.
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
|
2006
|
Nr 129, vol. 1
71-78
EN
The objective of the presented test program was to investigate the influence of the stator-to-stator and the rotor-to-rotor clocking on the performance in a two-stage low-pressure turbine. Keeping inlet conditions under constant control two turbine stages were experimentally investigated. Experimental data were obtained for nominal as well as for off-design speeds. The experimental investigations have been carried out on a two-stage turbine research facility at the Institute of the Turbomachinery of the Technical University of Lodz, Poland.
2
Influence of clocking effect on flow features in a two-stage test turbine
Krysiński J., Smolny A., Błaszczak J. R.
Systems : journal of transdisciplinary systems science
|
2006
|
Vol. 11, nr 1
44-51
EN
Detailed experimental investigations were conducted of flow structures in a model two-stage low-pressure turbine. The objective of this study was to gain more insight into phenomena affecting flow behaviour due to the indexing airfoils in multi-stage machines. To investigate the effect of the vane clocking on turbine efficiency an analysis of the experimental results throughout the flow field for different circumferential positions of the first stator was performed. Detailed flow pictures were measured for all measuring planes according to the radial and circumferential inter-row traversing. Aerodynamic measurements were compared to the turbine nominal speed and design clocking position of the two stators. Herein, some steady and unsteady flow measurement results, and the external characteristics for different circumferential positions of the stator vanes are described. The experimental investigations presented in this paper were carried out since mid-nineties [1] on a 2-stage turbine research facility TM-3 at the Institute of Turbomachinery of Technical University of Lodz.
3
Flow noise correlation with efficiency and vibration level - two-stage turbine case
Błaszczak J. R.
Systems : journal of transdisciplinary systems science
|
2006
|
Vol. 11, nr 1
8-15
EN
The objective of the presented test program was to investigate flow effects influence on the performance, noise and vibration levels of a two-stage low-pressure turbine. Measurement results for different circumferential positions of the turbine vanes are described to determine how noise and vibration could be affected by airfoil indexing and flow condition changes. Two cases are presented: for nominal rotational speed of the machine and for off-design turbine conditions (highly-loaded turbine case). Results showed some possibilities of a future turbomachinery performance and reliability improvement. In addition, another way to reduce noise emitted by a turbomachine and to lower vibration level is demonstrated. The investigations have been carried out at the Institute of Turbomachinery (Instytut Maszyn Przepływowych, IMP), Technical University of Lodz, Poland.
4
Badania warstw przyściennych na profilach kierownic w wysokoobciążonej turbinie dwustopniowej
Błaszczak J. R., Borzęcki T.
Systems : journal of transdisciplinary systems science
|
2006
|
Vol. 11, nr 1
136-144
PL
Określono rozkłady ciśnienia na profilach kierownic turbiny. Rozbieżności, jakie pojawiły się pomiędzy wcześniejszym modelowaniem numerycznym oraz danymi eksperymentalnymi [1], sprawiły, ze szczególną uwagę przywiązano do uzyskania bardzo stabilnej pracy maszyny oraz niezmienności wartości parametrów bezpośrednio przed wlotem do turbiny [2]. W pracy skupiono się głownie na szczegółowych rozkładach ciśnień na profilach dla dwóch prędkości obrotowych turbiny. Wpływ struktur przepływu przebadano zmieniając wzajemne położenia wieńców łopatek. Wyniki uzyskanych pomiarów porównano z obliczeniami numerycznymi przeprowadzonymi przy użyciu programu CFX TascFlow. Zarówno dane uzyskane z eksperymentu, jak i modelowania numerycznego, wykazały wpływ omawianych zmian parametrów pracy (prędkości obrotowej) oraz geometrii maszyny (zmiana wzajemnego położenia pierwszej kierownicy względem drugiej) w stosunku do założonych parametrów projektowych [3]. Uzyskana bardzo dobra zgodność obydwóch metod badawczych stanowi podstawę do dalszego modelowania przepływu w maszynie celem polepszenia jej wydajności. Rozbieżności zauważono przede wszystkim w obszarach bliskich ściankom ograniczającym kanał przepływowy (piasta i korpus maszyny) dla przypadku znacznie odbiegającego od projektowych warunków nominalnych.
5
Content available remote Vibro-Acoustic Variations Due to the Clocking Effect in a Two-Stage Turbine
Błaszczak J. R.
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
|
2005
|
nr 128, vol. 1
61-68
EN
The objective of the presented test program was to investigate vaneindexing effect influence on the performance, noise and vibration of a two-stage turbine. Some measurement results for different circumferential positions of the vanes are described to determine how noise and vibration could be affected by airfoil indexing. Two cases are presented: for nominal rotational speed and for off-design turbine conditions. The investigations have been carried out at the Institute of Turbomachinery (Technical University of Lodz, Poland).
6
Content available remote Static Pressure Variations on a Turbine Vane Due to the Clocking Effect
Błaszczak J. R., Borzęcki T.
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
|
2005
|
nr 128, vol. 1
69-78
EN
The objective of the presented test program was to investigate vane clocking effect influence on the performance of a two-stage model turbine at the Institute of Turbomachinery of the Technical University of Lodz, Poland. Keeping the inlet conditions strictly constant during the tests, two turbine stages were investigated. Herein, some flow measurement results and the machine performance for two indexing positions are described. Comparisons were made with numerical simulation for nominal rotational speed and for off-design turbine conditions.
7
Content available remote Efficiency Variations Due to the Vane Indexing in a Two-Stage Turbine
Krysiński J., Błaszczak J. R., Smolny A.
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
|
2005
|
nr 128, vol. 2
321-332
EN
The objective of this study was to gain more insight into phenomena affecting flow behaviour due to the indexing airfoil effects in multi-stage machines. To investigate the effect of the vane clocking on axial turbine efficiency and performance, an analysis of the experimental results of the steady and unsteady flow measurements throughout the flow field for different circumferential positions of the first stator has been performed. Aerodynamic measurements were compared to the turbine design speed and to the classical clocking position of the two stators [1].
8
Content available remote Badania wpływu wzajemnego położenia kierownic na sprawność dwustopniowej turbiny modelowej
Smolny A.
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
|
2000
|
nr 116
9--16
PL
Wykonano badania wpływu wzajemnego położenia kierownic dwustopniowej turbiny na jej charakterystyki zewnętrzne (przepływ, moment, sprawność) dla 5 punktów pracy turbiny. Badania mają duże znaczenie dla optymalnego ustawienia wzajemnego kierownic w wielostopniowych maszynach przepływowych.
EN
This paper concern experimental investigations conducted for detailed studies of the clocking effect in a two-stage low pressure turbine. Paper describes details of the test facility and aerodynamic operating parameters. Measured turbine efficiency was used to quantify the effect of stator clocking positions on turbine performance.
9
Content available remote Noise of the TM3 turbine – preliminary research
Gorząd P.
Mechanics and Mechanical Engineering
|
2000
|
Vol. 4, nr 1
45--50
EN
Preliminary acoustic research of the TM3 two-stage turbine in which sound is generated by processes associated with a fluid flow is presented. The study is not exhaustive but represents an attempt at determination of the sources of noise. These phenomena are quite complicated due to many noise generating processes which take place simultaneously in such machinery.
10
Content available remote Stator clocking effect investigations in a two-stage turbine
Krysiński J. E., Smolny A., Blaszczak J. R., Gallus H. E.
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
|
1999
|
nr 115
241--250
EN
Experimental investigations of external characteristics and the detailed flow structures in a two-stage low-pressure turbine were conducted. The objective of this study was to gain more insight into unsteady flow phenomena affecting flow behaviour due to the stator wake clocking effects in multi-stage machines. A clocking mechanism allows the first stator to be moved relative to the second stage stator. Analysis of the experimental results includes turbine performance as well as steady and unsteady flow measurements throughout the flow field for different circumferential positions of both stators. A global review of the clocking effect is presented.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.