AMCA InMotion - September 2019 - 16

Door

2 nozzles
inside air
curtain

Air
curtain

in dimensions to the one used

Nozzle
Nozzle

by Yuill.1 A two-dimensional
particle-image-velocimetry (PIV)

Nd:YAG laser
Person
model

Direction
vanes 20°

system with Nd:YAG laser and

Camera
ﬁeld of
view

apparatus was used to visualize

helium-ﬁlled-soap-bubble seeding
the airﬂow of two vertical planes
in a door with an isothermal air

Outside

Inside

curtain (Figure 1).

Capt ured PI V root-meanFIGURE 1. Nd:YAG-laser ﬁeld of view with seeding locations and person
model in doorway.

square data conﬁrmed the three
airflow conditions found in a
previous air-curtain numerical
study 5 : inflow breakthrough,
out f low brea k t h roug h, a nd
optimum (Figure 2). Also, it indicated that the experimental inﬁl-

Inside

Outside

tration rates measured through

(A) Exp. ∆P = 0.007 in. wc (1.7 Pa)

(B) Exp. ∆P = 0.018 in. wc (4.7 Pa)

(C) Exp. ∆P = 0.034 in. wc (8.5 Pa)

the chamber with an air curtain
conformed well with the data
obtained from numerical CFD
simulations within the pressuredifference range of − 0.008 to
0.08 in. wc (−2 Pa to 20 Pa). The
data additionally conﬁrmed the
ability of the models developed by
Wang2 and Wang and Zhong5 to
estimate air-curtain performance
in the inﬂow-breakthrough and

(A') CFD ∆P = 0.005 in. wc (1.3 Pa)

(B') CFD ∆P = 0.014 in. wc (3.6 Pa)

(C') CFD ∆P = 0.034 in. wc (8.7 Pa)

FIGURE 2. Comparison of experimental and CFD-simulation ﬂows,
1,791 fpm (9.1 m/s) at 20 degrees outward.

optimum conditions.
Based on infiltration/pressure measurements and visualized airﬂow data gathered at the

Concluded in May 2016, the second study, "Energy

doorway, the air-curtain modeling method used in previous

Saving Impact of Air Curtain Doors in Commercial Build-

numerical studies2,5 was found to be valid and capable

ings,"4 was an extended numerical evaluation of inﬁltration

of accurately capturing the performance of air curtains

involving energy simulations for two additional buildings.

in regard to air inﬁltration through double swing doors

Experimental validation of the CFD modeling method

(Figure 3).

and the theoretical modeling of air curtains on a small-

Following the validation of the CFD modeling methods, a

scale door was accomplished using an air curtain mounted

numerical study of more than 600 CFD cases was conducted.

to a specially designed large-scale test chamber similar

Simulations were performed for air curtains with discharge

16

20 19 A M CA i n m o t i o n

w w w. a m c a .o r g

http://www.amca.org

AMCA InMotion - September 2019

Table of Contents for the Digital Edition of AMCA InMotion - September 2019

Contents
AMCA InMotion - September 2019 - BB1
AMCA InMotion - September 2019 - BB2
AMCA InMotion - September 2019 - Cover1
AMCA InMotion - September 2019 - Cover2
AMCA InMotion - September 2019 - Contents
AMCA InMotion - September 2019 - 2
AMCA InMotion - September 2019 - 3
AMCA InMotion - September 2019 - 4
AMCA InMotion - September 2019 - 5
AMCA InMotion - September 2019 - 6
AMCA InMotion - September 2019 - 7
AMCA InMotion - September 2019 - 8
AMCA InMotion - September 2019 - 9
AMCA InMotion - September 2019 - 10
AMCA InMotion - September 2019 - 11
AMCA InMotion - September 2019 - 12
AMCA InMotion - September 2019 - 13
AMCA InMotion - September 2019 - 14
AMCA InMotion - September 2019 - 15
AMCA InMotion - September 2019 - 16
AMCA InMotion - September 2019 - 17
AMCA InMotion - September 2019 - 18
AMCA InMotion - September 2019 - 19
AMCA InMotion - September 2019 - 20
AMCA InMotion - September 2019 - 21
AMCA InMotion - September 2019 - 22
AMCA InMotion - September 2019 - 23
AMCA InMotion - September 2019 - 24
AMCA InMotion - September 2019 - 25
AMCA InMotion - September 2019 - 26
AMCA InMotion - September 2019 - 27
AMCA InMotion - September 2019 - 28
AMCA InMotion - September 2019 - 29
AMCA InMotion - September 2019 - 30
AMCA InMotion - September 2019 - 31
AMCA InMotion - September 2019 - 32
AMCA InMotion - September 2019 - 33
AMCA InMotion - September 2019 - 34
AMCA InMotion - September 2019 - 35
AMCA InMotion - September 2019 - 36
AMCA InMotion - September 2019 - 37
AMCA InMotion - September 2019 - 38
AMCA InMotion - September 2019 - 39
AMCA InMotion - September 2019 - 40
AMCA InMotion - September 2019 - 41
AMCA InMotion - September 2019 - 42
AMCA InMotion - September 2019 - 43
AMCA InMotion - September 2019 - 44
AMCA InMotion - September 2019 - Cover3
AMCA InMotion - September 2019 - Cover4
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