Flow Visualization of Angled Supersonic Jets into a Supersonic Cross Flow

Authors: Yan Shao, Jin Zhou, Lin Lai, Haiyan Wu, Jing Lei

Abstract:

This paper describes Nano-particle based Planar Laser Scattering (NPLS) flow visualization of angled supersonic jets into a supersonic cross flow based on the HYpersonic Low TEmperature (HYLTE) nozzle which was widely used in DF chemical laser. In order to investigate the non-reacting flowfield in the HYLTE nozzle, a testing section with windows was designed and manufactured. The impact of secondary fluids orifice separation on mixing was examined. For narrow separation of orifices, the secondary fuel penetration increased obviously compared to diluent injection, which means smaller separation of diluent and fuel orifices would enhance the mixing of fuel and oxidant. Secondary injections with angles of 30, 40 and 50 degrees were studied. It was found that the injectant penetration increased as the injection angle increased, while the interfacial surface area to entrain the freestream fluid is largest when the injection angle is 40 degree.

Keywords: HYLTE nozzle, NPLS, supersonic mixing, transverse injection

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1083679

References:

[1] W. A. Duncan, S. P. Patterson and B. R. Graves, "Overtone research, advanced chemical laser module design," Proc of SPIE, Vol. 2119, pp. 46-57, 1994.
[2] R. J. Driscoll, "Mixing enhancement in chemical lasers, Part I: experiments," AIAA Journal, vol. 24, no. 7, pp. 1120-1126, July 1986.
[3] Yuxin Zhao, Shihe YI and Lifeng Tian, "Supersonic flow imaging via nanoparticles," Sci China Ser E-Tech Sci, Vol. 52, no. 12, pp. 3640-3648, 2009.
[4] Jing Lei, Lin Lai and Zhenguo Wang, "Parameterized design for HYLTE secondary nozzle," High Power Laser and Particle Beams, Vol. 19, No. 11, pp. 1766-1770, 2007 (in Chinese).
[5] Ian A. Waitz, F. E. Marble and E. E. Zukoski, "Investigation of a contoured wall injector for hypervelocity mixing augmentation," AIAA Journal, Vol. 31, No. 6, 1993.
[6] J. U. Schl├╝ter and T. Schönfeld, "LES of jets in cross flow and its application to a gas turbine burner," Flow, Turbulence and Combustion, Vol. 65, No. 2, pp. 22-24, 2000.