进口导流叶片对S弯进气道出口旋流的抑制研究

本文通过在Ｓ弯管道进口段安装水平导流叶片，引主流气流吹除进口分离，有效地 出口旋流和流场压力畸变，使总压恢复提高。其抑制效果与叶片的安装角、安装位置及叶片宽度等参数有关。文中还探讨了安装多块导流叶片时的旋流抑制效果。结果表明安装三块导流叶片片可进一步降低旋汉，减流场压力畸变，并可以彻底消除单涡旋流，且有总压恢复提高。

Investigation on Swirl Control in a Diffusing S-Shaped Inlet with a Horizontal Guiding Fence

Experimental investigation on swirl control in a diffusing S-shaped inlet is described in this paper. In order to effectively reduce bulk swirl produced in the S-shaped inlet at high angle of attack, a horizontal guiding fence (blade) mounted near the entry of the diffuser is utilized. The effects of the locating position, angle against the centerline and width of the fence on the reduction of swirl and total pressure distortion and the increase of ayerage total pressure recovery at the exit o f the inlet are described. The results show that the swirl and total pressure distortion can be greatly reduced and the average total pressure recovery improyed with a horizontal guiding fence.To be more important.the swirls have different rotating directions when three fences are symmetrically mounted near the entry and the bulk swirl will disappear when the three fences are mounted at a certain angle.