Unsteady pressure measurement and numerical simulations in an end‐wall region of a linear blade cascade

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00010669%3A_____%2F21%3AN0000041" target="_blank" >RIV/00010669:_____/21:N0000041 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s42452-021-04737-8" target="_blank" >https://link.springer.com/article/10.1007/s42452-021-04737-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s42452-021-04737-8" target="_blank" >10.1007/s42452-021-04737-8</a>

Result language

angličtina

Original language name

Unsteady pressure measurement and numerical simulations in an end‐wall region of a linear blade cascade

Original language description

This contribution describes experimental and numerical research of an unsteady behaviour of a flow in an end-wall region of a linear nozzle cascade. Effects of compressibility ( M2,is) and inlet flow angle (α1 ) were investigated. Reynolds number (Re2,is = 8.5 × 105) was held constant for all tested cases. Unsteady pressure measurement was performed at the blade mid-span in the identical position s to obtain reference data. Surface flow visualizations were performed as well as the steady pressure measurement to support conclusions obtained from the unsteady measurements. Comparison of the surface Mach number distributions obtained from the experiments and from the numerical simulations are presented. Flow visualizations are then compared with calculated limiting streamlines on the blade suction surface. It was shown, that the flow structures in the end-wall region were not affected by the primary flow at the blade mid-span, even when the shock wave formed. This conclusion was made from the experimental, numerical, steady as well as unsteady points of view. Three significant frequencies in the power spectra suggested that there was a periodical interaction between the vortex structures in the end-wall region. Based on the data analyses, anisotropic turbulence was observed in the cascade.

Czech name

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Czech description

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Type

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

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/TN01000007" target="_blank" >TN01000007: National Centre for Energy</a><br>

Continuities

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

Publication year

2021

Confidentiality

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

Name of the periodical

SN Applied sciences

ISSN

2523-3963

e-ISSN

2523-3971

Volume of the periodical

761

Issue of the periodical within the volume

3

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

1-12

UT code for WoS article

000691612900001

EID of the result in the Scopus database

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