Automotive Engineering - May 2022 - 14

HONDA
AIRS IT OUT
Forty-ton rolling-road modules
can be relatively easily swapped
in the wind-tunnel test chamber.
HALO wind tunnel control room
during aeroacoustic testing.
The heart of the wind tunnel's operation is the 6700-hp fan that
can create up to 192-mph wind speed.
and brake pads are removed.
For low-riding racecars and sportscars, the wide-belt
ground plane - which can run at up to 193 mph (311 km/h)
is more desirable because of the crucial nature of the air
boundary layer at the front of the car. This is where the
modular system - supplied by Minnesota-based MTS -
comes into play. A crane positioned outside the testing
area slides over to remove the rolling road as a self-contained,
40-ton cassette. Then the desired ground-plane
dyno is inserted into its place. Although the four-hour
time to swap between rolling-road modules is a boon,
Unger concedes ideal test planning wouldn't rely on such
hot swaps. Vehicles, meanwhile, can be changed in 60
minutes or less, Unger claimed.
Atop each rolling-road module is a 12-m. (39.4-foot)
turntable to which the vehicle is secured. The turntable
can be rotated to any position up to 180 degrees
14 May 2022
relative to the airflow. Underneath is an ultra-precise three-axis balance
system that serves several purposes, one of the most important
being to measure aerodynamic drag force. Honda said its sensitivity
is plus-or-minus about 2.5 Newtons, or the weight of a D-size battery.
The entire setup can assess some 2,700 channels measuring load,
force and balance.
Aeroacoustic measures
To ascertain precise readings of general noise, flutter, frequency and
other wind-generated effects, the new wind tunnel is designed to
quickly and easily enable the setup of comprehensive acoustic arrays
supplied by Siemens. The top, front, side and interior arrays can deploy
up to 502 external microphones (as well as cameras) and 54
in-cabin microphones.
When the test chamber is set up for aeroacoustic NVH measurements,
a special acoustic cover is placed on the turntable because the
rolling road is not required when the only concern is the noise and
other effects created by the wind. The chamber itself is painstakingly
sound-deadened: at a wind force of 87 mph, there is just 56.5 dBA of
AUTOMOTIVE ENGINEERING
ALL IMAGES: HONDA

Automotive Engineering - May 2022

Table of Contents for the Digital Edition of Automotive Engineering - May 2022

Automotive Engineering - May 2022 - INTRO1
Automotive Engineering - May 2022 - SPONSOR1
Automotive Engineering - May 2022 - CVR1
Automotive Engineering - May 2022 - CVR2
Automotive Engineering - May 2022 - 1
Automotive Engineering - May 2022 - 2
Automotive Engineering - May 2022 - 3
Automotive Engineering - May 2022 - 4
Automotive Engineering - May 2022 - 5
Automotive Engineering - May 2022 - 6
Automotive Engineering - May 2022 - 7
Automotive Engineering - May 2022 - 8
Automotive Engineering - May 2022 - 9
Automotive Engineering - May 2022 - 10
Automotive Engineering - May 2022 - 11
Automotive Engineering - May 2022 - 12
Automotive Engineering - May 2022 - 13
Automotive Engineering - May 2022 - 14
Automotive Engineering - May 2022 - 15
Automotive Engineering - May 2022 - 16
Automotive Engineering - May 2022 - 17
Automotive Engineering - May 2022 - 18
Automotive Engineering - May 2022 - 19
Automotive Engineering - May 2022 - 20
Automotive Engineering - May 2022 - 21
Automotive Engineering - May 2022 - 22
Automotive Engineering - May 2022 - 23
Automotive Engineering - May 2022 - 24
Automotive Engineering - May 2022 - 25
Automotive Engineering - May 2022 - 26
Automotive Engineering - May 2022 - 27
Automotive Engineering - May 2022 - 28
Automotive Engineering - May 2022 - 29
Automotive Engineering - May 2022 - CVR4
Automotive Engineering - May 2022 - BETCVRA
Automotive Engineering - May 2022 - BETCVRB
Automotive Engineering - May 2022 - BETCVR1
Automotive Engineering - May 2022 - BETCVR2
Automotive Engineering - May 2022 - BET1
Automotive Engineering - May 2022 - BET2
Automotive Engineering - May 2022 - BET3
Automotive Engineering - May 2022 - BET4
Automotive Engineering - May 2022 - BET5
Automotive Engineering - May 2022 - BET6
Automotive Engineering - May 2022 - BET7
Automotive Engineering - May 2022 - BET8
Automotive Engineering - May 2022 - BET9
Automotive Engineering - May 2022 - BET10
Automotive Engineering - May 2022 - BET11
Automotive Engineering - May 2022 - BET12
Automotive Engineering - May 2022 - BET13
Automotive Engineering - May 2022 - BET14
Automotive Engineering - May 2022 - BET15
Automotive Engineering - May 2022 - BET16
Automotive Engineering - May 2022 - BET17
Automotive Engineering - May 2022 - BET18
Automotive Engineering - May 2022 - BET19
Automotive Engineering - May 2022 - BET20
Automotive Engineering - May 2022 - BET21
Automotive Engineering - May 2022 - BET22
Automotive Engineering - May 2022 - BET23
Automotive Engineering - May 2022 - BET24
Automotive Engineering - May 2022 - BET25
Automotive Engineering - May 2022 - BET26
Automotive Engineering - May 2022 - BET27
Automotive Engineering - May 2022 - BETCVR4
https://www.nxtbook.com/smg/sae/24AE08
https://www.nxtbook.com/smg/sae/24AE06
https://www.nxtbook.com/smg/sae/24AE05
https://www.nxtbook.com/smg/sae/24AE04
https://www.nxtbook.com/smg/sae/24AE03
https://www.nxtbook.com/smg/sae/24AE02
https://www.nxtbook.com/smg/sae/23AE12
https://www.nxtbook.com/smg/sae/23AAVE11
https://www.nxtbook.com/smg/sae/23AE10
https://www.nxtbook.com/smg/sae/23AE09
https://www.nxtbook.com/smg/sae/23AE08
https://www.nxtbook.com/smg/sae/23AAVE07
https://www.nxtbook.com/smg/sae/23AE06
https://www.nxtbook.com/smg/sae/23AE05
https://www.nxtbook.com/smg/sae/23AAVE04
https://www.nxtbook.com/smg/sae/23AE04
https://www.nxtbook.com/smg/sae/23AE03
https://www.nxtbook.com/smg/sae/23AE02
https://www.nxtbook.com/smg/sae/23AAVE01
https://www.nxtbook.com/smg/sae/22AE12
https://www.nxtbook.com/smg/sae/22AVE11
https://www.nxtbook.com/smg/sae/22AE10
https://www.nxtbook.com/smg/sae/22AE09
https://www.nxtbook.com/smg/sae/22AE08
https://www.nxtbook.com/smg/sae/22AVE07
https://www.nxtbook.com/smg/sae/22AE06
https://www.nxtbook.com/smg/sae/22AE05
https://www.nxtbook.com/smg/sae/22AVE04
https://www.nxtbook.com/smg/sae/22AE04
https://www.nxtbook.com/smg/sae/22AE03
https://www.nxtbook.com/smg/sae/22AE02
https://www.nxtbook.com/smg/sae/22AVE01
https://www.nxtbook.com/smg/sae/21AE12
https://www.nxtbook.com/smg/sae/21AVE11
https://www.nxtbook.com/smg/sae/21AE10
https://www.nxtbook.com/smg/sae/21AVE09
https://www.nxtbook.com/smg/sae/21AE09
https://www.nxtbook.com/smg/sae/21AE08
https://www.nxtbook.com/smg/sae/21AVE07
https://www.nxtbook.com/smg/sae/21AE06
https://www.nxtbook.com/smg/sae/21AE05
https://www.nxtbook.com/smg/sae/21AVE05
https://www.nxtbook.com/smg/sae/21AE04
https://www.nxtbook.com/smg/sae/21AE03
https://www.nxtbook.com/smg/sae/21AVE03
https://www.nxtbook.com/smg/sae/21AE02
https://www.nxtbookmedia.com