中文摘要：

本文针对低进气度涡轮进行了气动设计和流场分析。在设计中为保证导叶通道通流能力不受部分进气影响，按照导叶叶片数与导叶进气叶片通道数之比等于流量放大倍数的原则选定导叶叶片数。分析表明，所设计的低进气度涡轮膨胀比和出功等皆达到设计要求；部分进气遮蔽物的存在使得动叶进入或者离开非进气扇区时静压变化较大，且动量输运和质量输运使得动叶出口静压趋向均匀；相同进气度时进气扇区集中分布能够减少膨胀以及混合损失，因此可以认为相同进气度条件下单级部分进气涡轮进气扇区集中分布时涡轮效率高于进气扇区沿周向均布时涡轮的效率。

英文摘要：

The aerodynamic design and analysis of a axial gas turbine with low partial admission rate are presented. In order to guarantee the flow capacity of the stator, the ratio of stator-blade-number to unblocking stator-blade-number be equal to the enlargement factor of flow mass. The performance of computational case showed that the aerodynamic design can fulfill the target. Comparison of the circumferential static pressure distribution at different cross sections showed that the blocking has a great impact on static pressure, and the transfer of mass and momentum can decrease the blocking effect. The influence of the circumferential position of the admitted arc on stage efficiency is discussed. It is found that the stage efficiency with a single arc at a given admission degree is higher than the two opposing blocked arcs.