Wind-Tunnel and On-Road Wind Noise: Comparison and Replication RMIT University

Format:

Conference/Event

Author/Creator:

Thompson, Thompson, author.

Contributor:

Kim, Jongman

Watkins, Simon

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

A KIA Soul was instrumented to measure the relative velocity(magnitude and yaw angle) at the front of the vehicle and in-cabinsound at a location close to the side glass near the A-pillarvortex impingement. Tests were conducted at a proving ground undera range of conditions from low wind conditions (~3 m/s) to moderate(7-8 m/s) wind speeds. For any given set of atmospheric conditionsthe velocity and sound data at any given position on the provingground were noted to be very repeatable, indicating that the localwakes dominated the "turbulent" velocity field.Testing was also conducted in an aeroacoustic wind tunnel insmooth flow and with a number of novel turbulence generatingmethods. The resulting sounds were analyzed to study the modulationat frequencies likely to result in fluctuation strength type noise.The wind-tunnel results were compared to the on-road measurementsto investigate the potential of generating repeatable andcontrollable turbulence in a wind tunnel which replicates themodulated noise experienced on-road.The results showed that the novel methods used do increase themodulation significantly and subjective analysis indicates that themodulation generated was similar to that experienced on-road.Analytical analysis of the same data showed the extent of themodulation and it was found that that the magnitude of themodulation was too high at low modulation frequencies and too lowat higher frequencies. It is believed that with further developmentof the wind-tunnel techniques the distribution over the modulationfrequencies of interest could be improved

Notes:

Vendor supplied data

Publisher Number:

2013-01-1255

Access Restriction:

Restricted for use by site license