Streamwise vorticity enhancement for a lobed forced mixer via scarfing

S. C.M. Yu, X. Y. Hou, L. P. Chua

Research output: Chapter in book / Conference proceedingChapter in an edited book (as author)Academic researchpeer-review


Scarfing a lobed mixer is achieved by alternate extending and cutting back on the lobes at the trailing edge. This modification is intended to enhance the strength of streamwise circulation without experiencing any undesirable effects, such as flow separation at the lobe troughs. Tests have been conducted over a range of low speed subsonic flow conditions using a laser Doppler anemometer. Up to four cross-stream vortices are formed immediately behind the trailing edge as a result of scarfing. The general features of the flow behind the scarfed mixer are very similar to those found in the scalloped mixer (Yu, Yip and Liu (1996)). Streamwise circulation generated at the trailing edge is some 30% higher by the scarfed lobes than by the normal lobes (Yu, Yeo and Teh (1995)). However, the preliminary assessment on the losses incurred by the scarfed lobes showed that they would have higher values than the normal lobes due to larger wetted surfaces.

Original languageEnglish
Title of host publicationProceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM)
PublisherAmerican Society of Mechanical Engineers
Number of pages1
ISBN (Print)0791819612
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • General Earth and Planetary Sciences
  • General Engineering
  • General Environmental Science


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