A thermally stratified wind tunnel for environmental flow studies

Yuji Ohya, M. Tatsuno, Y. Nakamura, H. Ueda

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

A wind tunnel was constructed to study the effects of thermal stratification on flow and diffusion in the atmospheric boundary layer. The wind tunnel is of a suction type and has a 1.5 m wide, 1.2 m high, 13.5 m long, rectangular test section. Designed to produce thermally stratified flows, the tunnel is equipped with two independent temperature systems, an air-flow heating unit (AHU) and a floor temperature controlling unit (FTCU). Using the AHU and FTCU, a wide range of thermal stratification can be generated with a wind speed in the range of (U =) 0.2-2.0 m s-1. Both in neutral and stably stratified flows, the tunnel can provide a uniform smooth flow with a low turbulence intensity of about 0.4% at a wind speed less than 1 ms-1. The design features and performance of the wind tunnel are described. The characteristic of thermally stratified flows created in the test section is also discussed.

Original languageEnglish
Pages (from-to)2881-2887
Number of pages7
JournalAtmospheric Environment
Volume30
Issue number16
DOIs
Publication statusPublished - Jan 1 1996

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stratified flow
wind tunnel
airflow
stratification
tunnel
wind velocity
heating
temperature
suction
boundary layer
turbulence
test

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Atmospheric Science

Cite this

A thermally stratified wind tunnel for environmental flow studies. / Ohya, Yuji; Tatsuno, M.; Nakamura, Y.; Ueda, H.

In: Atmospheric Environment, Vol. 30, No. 16, 01.01.1996, p. 2881-2887.

Research output: Contribution to journalArticle

Ohya, Yuji ; Tatsuno, M. ; Nakamura, Y. ; Ueda, H. / A thermally stratified wind tunnel for environmental flow studies. In: Atmospheric Environment. 1996 ; Vol. 30, No. 16. pp. 2881-2887.
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