Influence of Seal Leakage Flows Interactions on Steam Turbine Efficiency
Project goals
The detailed study of the seal leakage interaction with the main flow, especially in the High- and Intermediate pressure steam turbine stages, is the aim of the project. It is mainly a systematic research of this complex flow by the numerical and experimental approaches. The goal of the research is description of flow structures, formulation of loss model and design of the new turbine stage seals structures. With the new approach the stages efficiency is believed to increase of 0.2 – 0.5% depending on a specific stage conditions.
Keywords
loss modelrotor and tip sealsaxial turbine stageexperimental methodsCFDair test turbineside-flows
Public support
Provider
Technology Agency of the Czech Republic
Programme
Programme of applied research and experimental development EPSILON
Call for proposals
EPSILON 2 (STA02017TH02)
Main participants
Výzkumný a zkušební letecký ústav, a.s.
Contest type
VS - Public tender
Contract ID
2016TH02020086
Alternative language
Project name in Czech
Vliv interakce proudění z ucpávek na efektivitu práce stupňů parních turbín.
Annotation in Czech
Cílem projektu je detailně prostudovat vliv interakce proudění z ucpávek s hlavním proudem zejména v případech vysokotlakých a středotlakých dílů parních turbín. Jedná se o systematický výzkum tohoto složitého mechanismu proudění pomocí numerických i experimentálních přístupů s cílem jeho detailního popisu, sestavení ztrátového modelu a návrhu nového tvarování příslušných konstrukčních prvků. Vlivem nových konstrukčních řešení výtoku z ucpávek se očekává dodatečné zvýšení účinnosti stupňů 0.2 - 0.5%, v závislosti na specifických podmínkách konkrétního stupně.
Scientific branches
R&D category
AP - Applied research
CEP classification - main branch
JE - Non-nuclear power engineering, energy consumption and utilization
CEP - secondary branch
BK - Liquid mechanics
CEP - another secondary branch
BJ - Thermodynamics
10305 - Fluids and plasma physics (including surface physics)
20303 - Thermodynamics
20704 - Energy and fuels
Completed project evaluation
Provider evaluation
U - Uspěl podle zadání (s publikovanými či patentovanými výsledky atd.)
Project results evaluation
The main goals of the project were met by the solution and the expected results were achieved. The project design assumed an increase in the internal efficiency of turbines by 0.2 - 0.5%, which would lead to significant savings in primary energy. The measurement of the analysis of the effects on efficiency is dealt with in a detailed study attached to the Final Report, but the evaluation of the actual change in efficiency is not explicitly stated in it. The reason may be that the measurements were not performed on real turbines, but on models and functional samples. However, it can be stated that the invested funds were spent efficiently and will lead to significant savings in primary energy and also to a probable increase in competitiveness. Application and use of the results is ensured for all project participants.
Solution timeline
Realization period - beginning
Jan 1, 2017
Realization period - end
Dec 31, 2020
Project status
U - Finished project
Latest support payment
Feb 28, 2020
Data delivery to CEP
Confidentiality
C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.
Data delivery code
CEP21-TA0-TH-U/02:1
Data delivery date
Jun 30, 2021
Finance
Total approved costs
22,527 thou. CZK
Public financial support
13,417 thou. CZK
Other public sources
0 thou. CZK
Non public and foreign sources
9,144 thou. CZK
Basic information
Recognised costs
22 527 CZK thou.
Public support
13 417 CZK thou.
59%
Provider
Technology Agency of the Czech Republic
CEP
JE - Non-nuclear power engineering, energy consumption and utilization
Solution period
01. 01. 2017 - 31. 12. 2020