Influences of Inlet Conditions on Flow Distortion in a Circular-to-Rectangular Transition Duct

J. J. Miau, C. Y. Wei, J. H. Chou, C. K. Lin

研究成果: Article同行評審

摘要

It was found experimentally that the three-dimensional pressure gradient developed in a circular-to-rectangular transition duct could be reduced in magnitude if the inlet boundary layer was thickened by a tripping device upstream. Accompanying with this phenomenon found was that the secondary flow formed in the corner region got diminished and the nonuniformity of the velocity distribution in the core region was increased. The condition under which the inlet flow was perturbed by a screen upstream was also investigated in this work. It was seen that the screen did not affect the inlet boundary-layer thickness appreciably, but promoted the laminar-turbulent transition process in the boundary layer and enhanced the ability of flow attaching to the diverging wall.

原文English
頁(從 - 到)67-83
頁數17
期刊International Journal of Turbo and Jet Engines
9
發行號1
DOIs
出版狀態Published - 1992

All Science Journal Classification (ASJC) codes

  • 航空工程

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