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本文采用多分区 ＳＩＭＰＬＥＣ算法对 ６００ ＭＷ汽轮机高压联合进汽阀门内部复杂流动进行了三维粘性数值分析。流场计算结果表明总压损失主要集中在调节阀喉口附近。调节阀阀碟前后的两股高速气流在阀碟的正上方位置相碰引起较大的掺混损失；气流经过调节阀喉口后，附面层急剧增厚，形成一层较厚的沿管壁的低总压区。计算得到的流场特性为即将开展的阀门结构优化设计提供了重要依据。
In this paper, a multi-partition SIMPLEC algorithm was used to analyze the three-dimensional viscous numerical simulation of the complicated flow in a 600 MW steam turbine high pressure combined inlet steam valve. Flow field calculation results show that the total pressure loss is mainly concentrated in the valve near the throat. The two high-speed airflows around the valve disc of the control valve collide with each other directly at the position above the valve disc to cause a large mixing loss. After the airflow passes through the throat of the control valve, the surface of the lamina rapidly thickens to form a thicker layer along the pipe Low wall total pressure zone. The calculated flow field characteristics provide an important basis for the upcoming valve structure optimization design.