Experimental Research on the Flow in the Steam Turbine Axial Exhaust Hood

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49193864%3A_____%2F19%3AN0000009" target="_blank" >RIV/49193864:_____/19:N0000009 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.epj-conferences.org/articles/epjconf/abs/2022/13/epjconf_efm2019_01063/epjconf_efm2019_01063.html" target="_blank" >https://www.epj-conferences.org/articles/epjconf/abs/2022/13/epjconf_efm2019_01063/epjconf_efm2019_01063.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/202226901063" target="_blank" >10.1051/epjconf/202226901063</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental Research on the Flow in the Steam Turbine Axial Exhaust Hood

Popis výsledku v původním jazyce

There is the still remaining task to increase the efficiency of power plants and steam turbines. One possibility to increase the thermodynamic efficiency is to apply a suitable exhaust hood. Axial exhaust hoods are mainly designed for small turbines up to 180 MW. They are a very important part of steam turbines and its main purpose is to take away the steam from the last stage outlet to a condenser with minimal loss or even with pressure compression and an increase in the last stage enthalpy drop. This paper concerns experimental measurements on the axial exhaust hood wind tunnel model. The main goal of this paper is to determine how given geometrical and flow parameters affect the resulting pressure recovery coefficient. Main observed parameters are velocity and circumferential angle profiles at the diffuser inlet along with a number, shape and geometrical configuration of internal struts. Several geometrical variants are measured for two types of circumferential angles at the diffuser inlet and for two values of Mach number in the presented work. Multi-hole pneumatic probes and pressure taps are used for flow parameters measurement. The proposed experimental model, along with corresponding CFD (computational fluid dynamics) simulations, will help to optimize the flow parameters in the exhaust hood and allow a decrease in pressure losses in this part.

Název v anglickém jazyce

Experimental Research on the Flow in the Steam Turbine Axial Exhaust Hood

Popis výsledku anglicky

There is the still remaining task to increase the efficiency of power plants and steam turbines. One possibility to increase the thermodynamic efficiency is to apply a suitable exhaust hood. Axial exhaust hoods are mainly designed for small turbines up to 180 MW. They are a very important part of steam turbines and its main purpose is to take away the steam from the last stage outlet to a condenser with minimal loss or even with pressure compression and an increase in the last stage enthalpy drop. This paper concerns experimental measurements on the axial exhaust hood wind tunnel model. The main goal of this paper is to determine how given geometrical and flow parameters affect the resulting pressure recovery coefficient. Main observed parameters are velocity and circumferential angle profiles at the diffuser inlet along with a number, shape and geometrical configuration of internal struts. Several geometrical variants are measured for two types of circumferential angles at the diffuser inlet and for two values of Mach number in the presented work. Multi-hole pneumatic probes and pressure taps are used for flow parameters measurement. The proposed experimental model, along with corresponding CFD (computational fluid dynamics) simulations, will help to optimize the flow parameters in the exhaust hood and allow a decrease in pressure losses in this part.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/TJ01000048" target="_blank" >TJ01000048: Snižování výstupní ztráty v parních turbínách moderní konstrukce</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

EFM19 – Experimental Fluid Mechanics 2019

ISBN

—

ISSN

2100-014X

e-ISSN

2100-014X

Počet stran výsledku

11

Strana od-do

Article Number 01063

Název nakladatele

EPJ Web of Conferences 269

Místo vydání

neuveden

Místo konání akce

Liberec

Datum konání akce

1. 1. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—