Near-Wall Flow in the Blade Cascades Representing Last Rotor Root Sections of Large Output Steam Turbines

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F21%3A00533089" target="_blank" >RIV/61388998:_____/21:00533089 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/21:00343229

Result on the web

<a href="https://link.springer.com/article/10.1007/s11630-020-1246-x" target="_blank" >https://link.springer.com/article/10.1007/s11630-020-1246-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11630-020-1246-x" target="_blank" >10.1007/s11630-020-1246-x</a>

Result language

angličtina

Original language name

Near-Wall Flow in the Blade Cascades Representing Last Rotor Root Sections of Large Output Steam Turbines

Original language description

This paper investigates the flow past two variants of root section profile cascades for a last stage rotor considering three-dimensional flow structures in the near-wall region. Analyses were drawn based on RANS numerical simulations of both variants and on the experimental data obtained by the 3D traversing in the exit flow field of one of the variants. Extent of 3D structures at two different regimes and its influence on aerodynamic characteristics of the blade cascades was assessed. The distributions of Mach number along the profiles were compared with 2D optical measurements and its distortion due to the presence of the sidewall was explored. The interaction between main vortical structures was described and its influence on the loading of the blades, mechanical energy losses and exit flow angle was discussed. The results showed that for a front loaded blade the vortical structures appeared earlier and at a larger extent than for an aft loaded variant. However, due to different Mach number distribution, contribution of end wall flow to the energy losses was lower in the case of the aft loaded variant. The influence of the near wall flow on the loading was found to be rather weak while the deviation of the exit flow angle appeared to be comparable for both of the variants.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20302 - Applied mechanics

Project

<a href="/en/project/TH02020057" target="_blank" >TH02020057: Turbine profile cascades for supersonic flow fields</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Journal of Thermal Science

ISSN

1003-2169

e-ISSN

1993-033X

Volume of the periodical

30

Issue of the periodical within the volume

1

Country of publishing house

CN - CHINA

Number of pages

11

Pages from-to

220-230

UT code for WoS article

000574097200001

EID of the result in the Scopus database

2-s2.0-85077530621