Experimental Investigation of Three
Types of Clean Room Diffusers using Particle Image Velocimetry and Laser
Doppler Velocimetry Techniques
M.
Angioletti, R.M. Di Tommaso, S. Martinelli and E. Nino
DIFA, Universitą degli Studi della Basilicata
Campus Macchia Romana, 85100 Potenza, Italy
Order Paper
£3.50 (offer only available from this site)
Abstract
The main purpose of this
paper is to evaluate the main fluid mechanics parameters in the exit
region of three different terminal systems commonly used for controlled
environments such as clean rooms or operating theatres. Three different
types of diffuser were tested i.e. a diffuser grid, a square ceiling
diffuser and a swirling radial discharge diffuser.
The paper presents results obtained experimentally which were carried
out in order to study the flow characteristics of isothermal jets issuing
from such devices. The study has been performed for four different air
flow rates for each type of terminal tested. To characterise the flow with
confidence and obtain high spatial resolution, a Particle Image
Velocimetry technique and a Laser Doppler Velocimetry technique were used.
For each case investigated, the results were plotted as velocity profile,
velocity magnitude, turbulence intensity and vorticity. The study displays
the particular behaviour of the flow generated by each terminal. Vorticity
regions and turbulence spots were also detected and carefully localised
for the investigated configurations.
Key words: PIV, LDV, velocimetry techniques, diffusers, clean
rooms, operating theatres, terminals
|
