在综述各种玻璃采光顶支承结构的基础上，提出了一种更适合采光顶要求的新型张弦梁结构。

Based on the summarization of all kinds of sustaining structures of glass roof, some modifications of the beam string structures (BSS) were made.

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渐缩型间隙在叶片前半轴弦受到上通道涡的抑制，减少了叶顶间隙泄漏涡的强度和范围；

Suppressed by the up passage vortex at upstream side of blade, the intensity and scale of the tip clearance leakage vortex is decreased.

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渐缩型间隙在叶片前半轴弦受到上通道涡的抑制，减少了叶顶间隙泄漏涡的强度和范围；

Suppressed by the up passage vortex at upstream side of blade, the intensity and scale of the tip clearance leakage vortex is decreased.

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