储能飞轮风损的理论计算与试验研究

THEORETICAL CALCULATION AND EXPERIMENTAL STUDY ON THE WIND LOSS OF THE ENERGY STORAGE FLYWHEEL

高速旋转的储能飞轮与真空室内的稀薄气体因摩擦而产生的能量损耗即风损,从理论上对飞轮转子外壁和端面与气体的摩擦损耗功率进行推导,得到了飞轮风损的计算公式,依据对计算结果的分析,提出降低飞轮风损的措施。在飞轮储能系统试验系统上进行的风损测试结果与理论计算基本相符。当真空低于0.01Pa时,试验复合材料飞轮的风损可以忽略不计。

The wind loss denotes the energy lost due to the friction between the rarefied gas in the vacuum chamber and the energy storage flywheel rotating at a super high speed. The theoretical formula is deduced to draw the wind loss at the cylindrical side wall and the end side of the flywheel. The method of cut ting down the wind loss is presented according to the calculation and analysis on the wind loss. The calculated wind loss is accordance with the test result from the experiments on the flywheel energy storage system. The wind loss of the composites flywheel in test would be small enough to be ignored on the condition that the pressure is lower than 0.01 Pa in the vacuum chamber containing the flywheel.