Experimental Study of Dehumidified Air Convection by Holographic and Thermocouple Methods

The objective of this work is the improvement of the heat dissipation and the cooling of electric motors intended for the traction of vehicles. Two ways of improvement are proposed. The first one consists in replacing the air surrounding the stator windings by resins of higher thermal conductivity. The second way consists in using the spray cooling technique to cool the hottest parts of electric motor, i.e. coil windings. The two solutions are tested independently and simultaneously. Results show that filling the coil windings with resin enables better heat dissipation in the case of basic cooling by free air convection. On the contrary, the lowest temperatures are obtained with traditional coil winding without resin and by using spray cooling. In that case, the liquid part of the spray may infiltrate inside the coil and the evaporation takes place at the hottest point.

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An Experimental Study of Heat Transfer During Forced Air Convection

Journal of Materials Engineering and Performance ◽

10.1007/s11665-010-9745-7 ◽

2010 ◽

Vol 20 (7) ◽

pp. 1264-1270 ◽

Cited By ~ 8

Author(s):

Bowang Xiao ◽

Gang Wang ◽

Qigui Wang ◽

Mohammed Maniruzzaman ◽

Richard D. Sisson ◽

...

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Air Convection ◽

Forced Air

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A combined numerical and experimental study of air convection in a differentially heated rotating cubic cavity

International Journal of Heat and Mass Transfer ◽

10.1016/0017-9310(95)00404-1 ◽

1996 ◽

Vol 39 (15) ◽

pp. 3193-3210 ◽

Cited By ~ 21

Author(s):

Y.T. Ker ◽

T.F. Lin

Keyword(s):

Experimental Study ◽

Air Convection

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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