Linsen WANG, Xiaobo TU, Yuhang WANG, et al. Fuel/air mixing characteristics of scramjet combustor based on acetone⁃PLIF technology[J]. Journal of Aerospace Power, 2021, 36(8): 1614-1620.
DOI:
Linsen WANG, Xiaobo TU, Yuhang WANG, et al. Fuel/air mixing characteristics of scramjet combustor based on acetone⁃PLIF technology[J]. Journal of Aerospace Power, 2021, 36(8): 1614-1620.DOI: 10.13224/j.cnki.jasp.20200444.
Fuel/air mixing characteristics of scramjet combustor based on acetone⁃PLIF technology
In order to study fuel/air mixing characteristics in scramjet combustor,a non-invasive flow visualization system was designed based on acetone-PLIF (planar laser-induced fluorescence) technology.The acetone fluorescence images of four kinds of shaped struts were obtained at different sections,and the effects of nozzle position and trailing edge angle on fuel/air mixing were studied.The results showed that the flow field of the “standard” NL1 strut was of a transverse “S” curve,which had normal mixing effect in the four struts.The NL2 strut increased a few acetone diffusion range,but decreased mixing area with fluorescence signals.The EL1 strut with an expanded trailing edge angle can greatly improve effect,since the acetone molecules filled over a half of the cross section at 54 mm downstream the strut.
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