0

Full Content is available to subscribers

Subscribe/Learn More  >

Numerical Investigation on Aerodynamic Similitude for Axial Microfan

[+] Author Affiliations
Qikun Wang

University of Shanghai for Science and Technology, Shanghai, China

Paper No. POWER2011-55398, pp. 639-644; 6 pages
doi:10.1115/POWER2011-55398
From:
  • ASME 2011 Power Conference collocated with JSME ICOPE 2011
  • ASME 2011 Power Conference, Volume 2
  • Denver, Colorado, USA, July 12–14, 2011
  • ISBN: 978-0-7918-4460-1
  • Copyright © 2011 by ASME

abstract

Axial microfan is widely used as cooling equipment for electronic devices such as PCs. Currently, the PC size becomes smaller and smaller while their operating speed becomes faster and faster, which calls for better cooling performance of axial microfan. As an important and effective design approach, the similitude design has been widely used in the design of large and medium fans, but not yet in the design of axial microfan. The traditional similitude design approach may work well in self-similitude area for Reynolds number, such as the flow inside the large and medium fans, where simple geometric similitude can promise the aerodynamic similitude. But the flow inside the microfan locates in non self-similitude area for Reynolds number, where the traditional similitude design for large and medium fans may be out of work on microfans, which results in poor performance of the microfan designed by the traditional similitude approach. In this paper, the aerodynamic similitude conditions for axial microfan are presented according to the similitude principle for aerodynamics. Compared to large and medium fans in self-similitude area, a new criterion called ‘Chord Reynolds Number Criterion’ suitable to the flow in non self-similitude area is proposed and is numerically validated with discussions on its applicability and limitation. Results indicate that ‘Chord Reynolds Number Criterion’ can well realize the aerodynamic similitude for the axial microfan but it requires that the revolution speed of the impeller should be in direct proportion to the squared minification of the model impeller, so the reduced scale of model impeller shall not be too large, otherwise new non similitude factors may occur again due to too high revolution speed.

Copyright © 2011 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In