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对琅琊山水电站蜗壳层进行了热态相似模型试验研究,采用相似理论和热量阿基米德相似准则数确定了模型的相应比例尺,基于蜗壳层不同进风方式探讨了不同送风温度(自然风或空调风)和接力风机启闭对蜗壳层工作区无因次风速和模型温度的影响;基于接力风机的不同安放位置探讨了蜗壳层工作区温度场的分布。试验结果表明,在送空调风、埋管引风机和接力风机均开启时,蜗壳层工作区的气流均匀,风速满足要求,能有效降低工作区的温度;接力风机的安放位置可根据实际情况而定。
The similar model of the volute shell in Langyashan Hydropower Station was studied. The corresponding scale of the model was determined by the similarity theory and the similarity criterion of calorimetric method. The effects of different blast temperature ( Natural wind or air-conditioned wind) and relay fan opening and closing on the non-dimensional wind speed and model temperature in the working area of volute casing. Based on the different placement of relay fan, the distribution of temperature field in the working area of volute casing was discussed. The test results show that the air flow in the working area of the volute casing is uniform and the wind speed meets the requirements when the air conditioner air conditioner, the buried draft fan and the relay fan are on, which can effectively reduce the temperature in the working area. The placement position of the relay fan can be adjusted according to the actual situation And set.