Publication detail

Measurement of the airflow velocity upstream and downstream a wire mesh using constant temperature anemometry

LÍZAL, F. TUHOVČÁK, J. JÍCHA, M.

Czech title

Měření rychlosti proudění vzduchu před a za drátěnou mřížkou pomocí termoanemometrie

English title

Measurement of the airflow velocity upstream and downstream a wire mesh using constant temperature anemometry

Type

conference paper

Language

en

Original abstract

Measurement of velocity upstream and downstream a special wire mesh was performed to ascertain the effect of the mesh on the flow. The mesh consisted of two components, a basic rectangular mesh with mesh width 1.22 mm and wire diameter 0.2 mm, and a top steel wool with random position of wires and wire diameter 0.05 mm. The velocity was measured by Constant Temperature Anemometry using single wire probe in a Plexiglas channel of rectangular cross-section. As a first step, measurement of one horizontal and one vertical measuring line was performed 10 mm upstream and 6 mm downstream the wire mesh. A spatial velocity profile upstream of the wire mesh was smooth, while the downstream velocity profile was highly disturbed. However, velocity fluctuations expressed in terms of turbulence intensity downstream of the wire mesh were attenuated down to 1%. Further measurements of the area downstream the wire mesh will be performed to describe the development of the flow.

Czech abstract

Měření rychlosti proti proudu a po proudu speciální drátěné mřížky se provádí pro zjištění účinku mřížky na proudění. Mřížka se skládala ze dvou částí, základní obdélníkové pletivo s oky o průměru 1,22 mm a šířce drátu 0,2 mm a horní drátěnky s nahodilou polohou drátů o průměru 0,05 mm. Rychlost byla měřena termoanemometrem pomocí jednodrátkové sondy v plexisklovém kanálu obdélníkového průřezu. Jako první krok bylo provedeno měření jedné horizontální a jedné vertikální linie. Profil rychlosti před pletivem byl hladký, zatímco navazující rychlostní profil byl velmi narušen. Nicméně kolísání rychlosti vyjádřené intenzitou turbulence proudu za pletivem bylo zeslabeno až na 1%. Další měření v oblasti za mřížkou bude provedeno s cílem detailně popsat vývoj toku.

English abstract

Measurement of velocity upstream and downstream a special wire mesh was performed to ascertain the effect of the mesh on the flow. The mesh consisted of two components, a basic rectangular mesh with mesh width 1.22 mm and wire diameter 0.2 mm, and a top steel wool with random position of wires and wire diameter 0.05 mm. The velocity was measured by Constant Temperature Anemometry using single wire probe in a Plexiglas channel of rectangular cross-section. As a first step, measurement of one horizontal and one vertical measuring line was performed 10 mm upstream and 6 mm downstream the wire mesh. A spatial velocity profile upstream of the wire mesh was smooth, while the downstream velocity profile was highly disturbed. However, velocity fluctuations expressed in terms of turbulence intensity downstream of the wire mesh were attenuated down to 1%. Further measurements of the area downstream the wire mesh will be performed to describe the development of the flow.

Keywords in English

constant temperature anemometry, velocity, wire mesh, wire screen

RIV year

2013

Released

19.11.2013

Publisher

EDP Sciences

Location

Francie

ISBN

978-80-260-5375-0

ISSN

2100-014X

Book

EPJ Web of Conferences

Volume

67

Number

1

Pages from–to

1–4

Pages count

4

BIBTEX


@inproceedings{BUT110852,
  author="František {Lízal} and Ján {Tuhovčák} and Miroslav {Jícha},
  title="Measurement of the airflow velocity upstream and downstream a wire mesh using constant temperature anemometry",
  booktitle="EPJ Web of Conferences",
  year="2013",
  volume="67",
  number="1",
  month="November",
  pages="1--4",
  publisher="EDP Sciences",
  address="Francie",
  isbn="978-80-260-5375-0",
  issn="2100-014X"
}