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为研究导流叶片结构尺寸对盘腔预旋性能的影响,采用RNG k-ε模型对导流叶片无量纲宽度为0、0.1、0.2、0.4、0.6、0.8和1.0的预旋系统在不同旋转雷诺数工况下进行了数值研究。结果表明:导流叶片能够提高喷嘴压比和温降系数,旋转雷诺数越大,提高的幅度越大;旋转雷诺数较大时,喷嘴压比和温降系数随导流叶片无量纲宽度增大而增大,无量纲宽度超过0.6后,趋于平稳。当导流叶片无量纲宽度在0~0.2范围内,总压损失系数随导流叶片无量纲宽度的增大而增大;当导流叶片无量纲宽度大于0.2时,总压损失系数随导流叶片无量纲宽度的增大基本不发生变化。
In order to study the effect of the size of the guide vane on the pre-rotation performance of the disk, the RNG k-ε model was used to simulate the pre-rotation system with non-dimensional width 0, 0.1, 0.2, 0.4, 0.6, 0.8 and 1.0 of the guide vane in different rotation Reynolds number under the conditions of a numerical study. The results show that the guide vane can increase the nozzle pressure ratio and temperature drop coefficient. The larger the rotational Reynolds number is, the greater the increase is. When the rotational Reynolds number is large, the nozzle pressure ratio and temperature drop coefficient increase with the non-dimensional width of the guide vane Large and increased, dimensionless width of more than 0.6, tends to be stable. When the non-dimensional width of the guide vane is in the range of 0-0.2, the total pressure loss coefficient increases with the non-dimensional width of the guide vane. When the non-dimensional width of the guide vane is more than 0.2, the total pressure loss coefficient increases with the diversion Leafless dimensionless width increases basically unchanged.