Hot-Wire Investigation of Turbulence Topology behind Blades at Different Shape Qualities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F22%3A00556228" target="_blank" >RIV/61388998:_____/22:00556228 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23210/22:43964893

Výsledek na webu

<a href="https://mdpi-res.com/d_attachment/processes/processes-10-00522/article_deploy/processes-10-00522-v3.pdf?version=1646878698" target="_blank" >https://mdpi-res.com/d_attachment/processes/processes-10-00522/article_deploy/processes-10-00522-v3.pdf?version=1646878698</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/pr10030522" target="_blank" >10.3390/pr10030522</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hot-Wire Investigation of Turbulence Topology behind Blades at Different Shape Qualities

Popis výsledku v původním jazyce

The scope of this paper is to perform a detailed experimental investigation of the shape error effect on the turbulence evolution behind NACA 64-618 airfoil. This airfoil is 3D-printed with predefined typical shape inaccuracies. A high-precision optical 3D scanner was used to assess the shape and surface quality of the manufactured models. The turbulent flow was studied using hot-wire anemometry. The developed force balance device was provided to measure the aerodynamic characteristics of the airfoil. Experimental studies were carried out for three angles of attack, +10°, 0°, −10°, and different chord-based Reynolds numbers from 5.3 × 104 to 2.1 × 105. The obtained results show that the blunt trailing edge and rough surface decline the aerodynamic performance of the blades. In addition, the experimental results revealed a strong sensitivity of the Taylor microscale Reynolds number to the type of shape inaccuracy, especially at Re ≈ 1.7 × 105. We also discuss the evolution of the Reynolds stress components, the degree of flow anisotropy, and the power spectrum distributions depending on the airfoil inaccuracies. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Název v anglickém jazyce

Hot-Wire Investigation of Turbulence Topology behind Blades at Different Shape Qualities

Popis výsledku anglicky

The scope of this paper is to perform a detailed experimental investigation of the shape error effect on the turbulence evolution behind NACA 64-618 airfoil. This airfoil is 3D-printed with predefined typical shape inaccuracies. A high-precision optical 3D scanner was used to assess the shape and surface quality of the manufactured models. The turbulent flow was studied using hot-wire anemometry. The developed force balance device was provided to measure the aerodynamic characteristics of the airfoil. Experimental studies were carried out for three angles of attack, +10°, 0°, −10°, and different chord-based Reynolds numbers from 5.3 × 104 to 2.1 × 105. The obtained results show that the blunt trailing edge and rough surface decline the aerodynamic performance of the blades. In addition, the experimental results revealed a strong sensitivity of the Taylor microscale Reynolds number to the type of shape inaccuracy, especially at Re ≈ 1.7 × 105. We also discuss the evolution of the Reynolds stress components, the degree of flow anisotropy, and the power spectrum distributions depending on the airfoil inaccuracies. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/EF16_026%2F0008389" target="_blank" >EF16_026/0008389: Výzkumná spolupráce pro dosažení vyšší účinnosti a spolehlivosti lopatkových strojů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Processes

ISSN

2227-9717

e-ISSN

2227-9717

Svazek periodika

10

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

22

Strana od-do

522

Kód UT WoS článku

000774237400001

EID výsledku v databázi Scopus

2-s2.0-85126518599