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通过吹风试验研究了汽轮机排汽缸内安装导流挡板对排汽缸性能的影响,采用CFD软件对排汽缸计算模型进行了模拟,获得了安装不同导流挡板的工况下排汽缸的气动性能和内部流场的变化.结果表明:在排汽缸内合理地安装导流挡板能有效提高排汽缸的扩压能力并降低流动损失,而且还可以改善其出口流场的均匀性.试验和数值模拟均证明,使流量在导流挡板两侧平均分配的5号挡板的效果最佳,分别使静压恢复系数提高了约0.029,使总压损失系数降低了约0.025,使出口不均匀度降低了约30.0%.
The blower test was carried out to study the influence of the baffles installed in the turbine exhaust cylinder on the performance of the exhaust air cylinder. The CFD software was used to simulate the exhaust air cylinder calculation model and the aerodynamic performance of the exhaust air cylinder under different deflector conditions was obtained. And the internal flow field.The results show that the rational installation of diversion baffles in the discharge cylinder can effectively improve the discharge capacity of the discharge cylinder and reduce the flow loss and can also improve the uniformity of the outlet flow field.Experimental and numerical Simulations have shown that the effect of the No. 5 baffle, which distributes the flow rate evenly across the baffle, results in an increase in the static pressure recovery factor of about 0.029, a reduction of about 0.025 in the total pressure loss factor, Degree decreased by about 30.0%.