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標題: 軸對稱引導燃燒器後方之等溫流場特性
作者: 郭正雄
關鍵字: 軸對稱引導燃燒器;駐焰;迴旋速度
出版社: 國立中興大學工學院;Airiti Press Inc.
Project: 興大工程學報, Volume 10, Issue 1, Page(s) 43-58.

The isothermal flow characteristic behind an axisymmetric pilot burner is investigated by experiment through the velocity and static pressure
measurements. Slit opening at the leading-edge of the pilot burner will result in a stable centerline-biased jet stream that modifies the near wake flow structure and effectively suppresses the streamwise velocity fluctuation behind the pilot burner. This modification may provide a stable flow environment for the ignition source to reside. In additions, the swirling component not only increases the mixing in the radial direction due to centrifugal effect but also creates a region of low velocity fluctuations in the downstream region. Moreover, the presence of the swirling flow creates a relatively low-pressure region in the afterburner providing a flameholding environment. With the angle of guiding-vane larger than 60 degree, the centrifugal effect induced by strong swirling flow may lead to a local streamwise adverse pressure gradient along the centerline. Furthermore, the merging location from the annual jet between central body and the pilot burner in conjunction with the swirling component primarily determines the efficiency of the momentum and energy exchange in both the streamwise and cross-stream directions.
ISSN: 1017-4397
Appears in Collections:第10卷 第1期

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