This paper presents experimental investigations on turbulent gas flow characteristics of nitrogen gas through a micro-channel. The micro-channels were etched into silicon wafers, capped with glass, and their hydraulic diameter is 147.76 micro meters. The micro-channel was designed with a main flow channel and seven side channels, which lead to the pressure transducers. The stagnation pressure was designated in such a way that the flow is in turbulent flow regime. The outlet of the channel faced to the atmosphere. The pressures of the main channel at seven locations were measured by gauge pressure transducers to determine local values of Mach number. And the pressure differences of each pressure ports were measured by differential pressure transducers to obtain the pressure losses precisely. The pressure distribution of turbulent gas flow through a micro-channel falls steeply and Mach number increases near the outlet with increasing the inlet pressure due to flow acceleration. Both Darcy friction factor and Fanning friction factor were obtained for turbulent flow. The result shows that the obtained both friction factors were evaluated as a function of Reynolds number on the Moody chart. The values of Darcy friction factors differ from Blasius correlation for turbulent flow regime due to the compressibility effects, however the values of Fanning friction factors coincide with Blasius correlation.
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ASME 2011 International Mechanical Engineering Congress and Exposition
November 11–17, 2011
Denver, Colorado, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5492-1
PROCEEDINGS PAPER
Experimental Investigations of Turbulent Gas Flow in a Micro-Channel
Shinichi Matsushita,
Shinichi Matsushita
Tokyo University of Science, Noda, Chiba, Japan
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Chungpyo Hong,
Chungpyo Hong
Tokyo University of Science, Noda, Chiba, Japan
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Yutaka Asako,
Yutaka Asako
Tokyo Metropolitan University, Hachioji, Tokyo, Japan
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Ichiro Ueno
Ichiro Ueno
Tokyo University of Science, Noda, Chiba, Japan
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Shinichi Matsushita
Tokyo University of Science, Noda, Chiba, Japan
Chungpyo Hong
Tokyo University of Science, Noda, Chiba, Japan
Yutaka Asako
Tokyo Metropolitan University, Hachioji, Tokyo, Japan
Ichiro Ueno
Tokyo University of Science, Noda, Chiba, Japan
Paper No:
IMECE2011-63295, pp. 1077-1081; 5 pages
Published Online:
August 1, 2012
Citation
Matsushita, S, Hong, C, Asako, Y, & Ueno, I. "Experimental Investigations of Turbulent Gas Flow in a Micro-Channel." Proceedings of the ASME 2011 International Mechanical Engineering Congress and Exposition. Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B. Denver, Colorado, USA. November 11–17, 2011. pp. 1077-1081. ASME. https://doi.org/10.1115/IMECE2011-63295
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