Theoretical study of turbine stage characteristics in off-design conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F18%3A43954262" target="_blank" >RIV/49777513:23210/18:43954262 - isvavai.cz</a>

Výsledek na webu

<a href="https://aip.scitation.org/doi/pdf/10.1063/1.5081641?class=pdf" target="_blank" >https://aip.scitation.org/doi/pdf/10.1063/1.5081641?class=pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5081641" target="_blank" >10.1063/1.5081641</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Theoretical study of turbine stage characteristics in off-design conditions

Popis výsledku v původním jazyce

The article deals with the theoretical analysis of the basic axial turbine stage characteristics. In the introduction, the analytical derivation of the stage efficiency is analysed, and the influence of the change of reaction, the velocity ratio u/cf and the absolute velocity exit angle from the stator blades are monitored. The next part consists of a 1D calculation in the middle blade radius with VT-400 (air turbine) input parameters, which is part of the experimental research at the Department of Power System Engineering. The calculation was carried out for 3 blading variants (low, medium and full reaction). Modes outside the turbine optimum operating point were induced by changing the velocity ratio u/cf, especially by changing the absolute isentropic velocity cf at constant circumferential velocity u. This action results in a change of the relative velocity vector flowing at the rotor blade. This leads to a redistribution of velocity triangles and causes additional losses (incidence losses).

Název v anglickém jazyce

Theoretical study of turbine stage characteristics in off-design conditions

Popis výsledku anglicky

The article deals with the theoretical analysis of the basic axial turbine stage characteristics. In the introduction, the analytical derivation of the stage efficiency is analysed, and the influence of the change of reaction, the velocity ratio u/cf and the absolute velocity exit angle from the stator blades are monitored. The next part consists of a 1D calculation in the middle blade radius with VT-400 (air turbine) input parameters, which is part of the experimental research at the Department of Power System Engineering. The calculation was carried out for 3 blading variants (low, medium and full reaction). Modes outside the turbine optimum operating point were induced by changing the velocity ratio u/cf, especially by changing the absolute isentropic velocity cf at constant circumferential velocity u. This action results in a change of the relative velocity vector flowing at the rotor blade. This leads to a redistribution of velocity triangles and causes additional losses (incidence losses).

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/LQ1603" target="_blank" >LQ1603: Výzkum pro SUSEN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1773-1

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

9

Strana od-do

020008-1 - 020008-9

Název nakladatele

AIP Conference Proceedings

Místo vydání

MELVILLE, NY 11747-4501 US

Místo konání akce

Plzeň, Česká republika

Datum konání akce

13. 6. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—