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| Placement angle effect of axial and radial stent on ventilation structure in bulb tubular turbine |
| 1.School of Electrical ＆ Electronic Engineering, Harbin University of Science and Technology, Harbin,Heilongjiang 150080,China; 2.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China |
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Abstract According to the principle of wind turbine,a forward inclined support was designed on light bulb tubular turbine to study the heat dissipation effect of axial or radial direction ventilation structure. Based on the increasing of radial angle, the axial angle was changed to verify the simulation data by reliability verification tests. The results show that a reasonable increase of radial or axial angle can improve the heat dissipation performance and singlesided radial air intake. The maximum temperature of winding with radial angle of 15° is 3.4% lower than that with radial angle of 0°.The maximum temperature of winding with axial angle of 20° is 5.0% lower than that with axial angle of 40° when the radial angle is 15°. The optimal heat dissipation performance can be achieved with radial angle of 15° and axial angle of 20°,and the temperature of main heating components of electric generator in whole machine can be controlled not more than 55 ℃.
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Received: 10 October 2012
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2013, Vol. 34 
