TY - JOUR
T1 - Acoustic emissions from active cooling solutions for portable devices
AU - Walsh, Ed
AU - Walsh, Patrick
AU - Punch, Jeff
AU - Grimes, Ronan
PY - 2009/12
Y1 - 2009/12
N2 - Due to ever increasing consumer demand, today's marketplace is full of portable computing devices such as notebook computers, gaming machines, personal digital assistants, and smart phones. In each of these technologies, processing power and functionality levels are continuing to increase, resulting in increased thermal management issues. The former of these technologies already use an active cooling solution with a profile of 1015 mm while the latter two are quickly approaching the limits of passive cooling. Since a common characteristic in each of these technologies is the desire to reduce profile height, there exists a need to develop low profile cooling solutions that are capable of supporting this growing market. However, a prerequisite to developing such solutions is an accurate understanding of how the noise level characteristics of the driving fans scale with height. This paper experimentally addresses the acoustic scaling of low profile fans. The rotor heights range from 0.5 mm to 15 mm with diameters from 15 mm to 32 mm, giving an aspect ratio of height relative to diameter of 0.030.6. The results can be used as a foundation for the development of active cooling in mobile devices where both correlations for noise levels and basic design criteria are identified.
AB - Due to ever increasing consumer demand, today's marketplace is full of portable computing devices such as notebook computers, gaming machines, personal digital assistants, and smart phones. In each of these technologies, processing power and functionality levels are continuing to increase, resulting in increased thermal management issues. The former of these technologies already use an active cooling solution with a profile of 1015 mm while the latter two are quickly approaching the limits of passive cooling. Since a common characteristic in each of these technologies is the desire to reduce profile height, there exists a need to develop low profile cooling solutions that are capable of supporting this growing market. However, a prerequisite to developing such solutions is an accurate understanding of how the noise level characteristics of the driving fans scale with height. This paper experimentally addresses the acoustic scaling of low profile fans. The rotor heights range from 0.5 mm to 15 mm with diameters from 15 mm to 32 mm, giving an aspect ratio of height relative to diameter of 0.030.6. The results can be used as a foundation for the development of active cooling in mobile devices where both correlations for noise levels and basic design criteria are identified.
KW - Acoustics
KW - Fan design
KW - Thermal management
UR - http://www.scopus.com/inward/record.url?scp=72149094575&partnerID=8YFLogxK
U2 - 10.1109/TCAPT.2009.2027605
DO - 10.1109/TCAPT.2009.2027605
M3 - Article
AN - SCOPUS:72149094575
SN - 1521-3331
VL - 32
SP - 776
EP - 783
JO - IEEE Transactions on Components and Packaging Technologies
JF - IEEE Transactions on Components and Packaging Technologies
IS - 4
M1 - 5290025
ER -