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中文摘要：
为了揭示端壁装配缝几何参数对叶片尾缘下游部分的气膜冷却特性影响机理，本文对GE-E^3直列叶栅中的装配缝气膜冷却特性进行了数值模拟研究。研究发现槽缝几何参数对叶片尾缘的冷却特性具有较大影响。装配缝两侧端壁中，靠近吸力面端壁低于另一侧端壁对提高端壁气膜有效度具有有利作用。双侧切角结构虽然提高了靠近装配缝区域的气膜有效度，但增大了冷却盲区。装配缝结构应以靠近吸力侧偏低的几何关系和提高冷却出流速度为目标进行设计和优化。
英文摘要：
In order to study the film cooling effect of leakage from midpassage gap on downstream endwall, the influence of the gap geometry is taken into consideration numerically, in the guide vane of GE-Ea turbine. As to the step height of gap, if the wall near the suction side of the blade is lower （SSL） than the other side of the other wall near the pressure side of the neighboring blade, the leakage shows positive effect on film cooling. However, the effect of the other step direction is negative. On the other hand, the cut corner of both side of the gap wall increases the cooling effectiveness, but also increases the cooling blind area.
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