Innovative design of experimental blade cascade model for in-depth analysis of stall flutter

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F24%3A00598764" target="_blank" >RIV/61388998:_____/24:00598764 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/24:00382385

Result on the web

<a href="https://journals.pan.pl/dlibra/publication/150806/edition/131539/content" target="_blank" >https://journals.pan.pl/dlibra/publication/150806/edition/131539/content</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.24425/bpasts.2024.150806" target="_blank" >10.24425/bpasts.2024.150806</a>

Result language

angličtina

Original language name

Innovative design of experimental blade cascade model for in-depth analysis of stall flutter

Original language description

Stall flutter is a serious threat to the operational integrity in turbomachinery, particularly in the final stage rotors of steam turbines and in compressors. Although computer science has developed rapidly and much of the research can be carried out using numerical tools, thesimulation of some phenomena, such as stall flutter, is still very challenging and needs to be supported by experimental data. This paper presents an innovative experimental linear blade cascade design with five prismatic blades with pitch degrees of freedom, designed to be operated in a low subsonic wind tunnel. The geometry of the blade cascade was chosen on the basis of the experimental and numerical tests to allow stall flutter initiation. New suspension, measurement and electromagnetic excitation systems were developed and experimentally tested to allow accurate measurement of aerodynamic damping during controlled flutter tests. The novelty of the experimental blade cascade is the possibility of single pulse excitation of the blades. The cascade can be brought to the edge of stability by adjusting the angle of attack and flow velocity, and then thenpulse can be used to induce stall flutter. Measurement of both mechanical and flow characteristics, also demonstrated in this paper, will provide data for in-depth analysis of stall flutter initiation and propagation.

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/GA20-26779S" target="_blank" >GA20-26779S: Study of dynamic stall flutter instabilities and their consequences in turbomachinery application by mathematical, numerical and experimental methods</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Polish Academy of Sciences. Bulletin. Technical Sciences

ISSN

0239-7528

e-ISSN

2300-1917

Volume of the periodical

72

Issue of the periodical within the volume

5

Country of publishing house

PL - POLAND

Number of pages

11

Pages from-to

e150806

UT code for WoS article

001410612000014

EID of the result in the Scopus database

2-s2.0-85204785473