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本方案的剖面示意于图1,正常高水位为175.00m,1.1×0.1‰校核洪水位为178.25m,底孔运转的最高水位为156.00m。深、底孔出口弧门处断面分别为7.0m×10.0m和7.0m×8.0m、模型比尺为1/70,用有机玻璃制成,试验设备为大连理工大学土木系的变压箱。常压试验表明,深、底孔同时泄流时两孔水流基本上互不影响,所以减压试验时把深、底孔切开,分别测定它们的空化特性。变压箱内的真空
The profile of the scheme is shown in Figure 1. The normal high water level is 175.00m, the check flood level of 1.1 × 0.1 ‰ is 178.25m, and the maximum water level of bottom hole operation is 156.00m. The cross section of the exit arc gate at the deep hole and the bottom hole is respectively 7.0m × 10.0m and 7.0m × 8.0m, and the model scale is 1/70, made of plexiglass. The test equipment is the transformer box of the civil engineering department of Dalian University of Technology. Atmospheric pressure tests showed that when the deep and the bottom holes were drained at the same time, the flow of the two holes basically did not affect each other. Therefore, the deep and the bottom holes were cut open during the decompression test, and their cavitation characteristics were respectively measured. Vacuum in the transformer box