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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/TN01000007" target="_blank" >TN01000007: Národní centrum pro energetiku</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

SN Applied sciences

ISSN

2523-3963

e-ISSN

2523-3971

Svazek periodika

761

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

000691612900001

EID výsledku v databázi Scopus

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