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Flame quenching process in cavity based on model scramjet combustor
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作者 Yu Pan Jing Lei +2 位作者 jian-han liang Wei-Dong Liu Zhen-Guo Wang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2012年第1期73-78,共6页
The flame quenching process in combustors was observed by high speed camera and Schlieren system, at the inflow conditions of Ma = 2.64, To = 1483K, P0 = 1.65 MPa, T = 724 K and P -- 76.3 kPa. Changing process of the ... The flame quenching process in combustors was observed by high speed camera and Schlieren system, at the inflow conditions of Ma = 2.64, To = 1483K, P0 = 1.65 MPa, T = 724 K and P -- 76.3 kPa. Changing process of the flame and shock structure in the combustor was clearly observed. The results revealed that the precom- bustion shock disappeared accompanied with the process in which the flame was blown out and withdrawed from the mainflow into the cavity and vanished after a short while. The time of quenching process was extended by the cavity flame holder, and the ability of flame holding was enhanced by arranging more cavities in the downstream as well. The flame was blown from the upstream to the downstream, so the flame in the downstream of the cavity was quenched out later than that in the upstream. 展开更多
关键词 Flame quenching process Cavity Model scramjet combustor
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Experimental investigation on upstream-injection interaction with a scramjet cavity flameholder 被引量:1
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作者 Ming-Bo Sun Shun-Ping Zhang +2 位作者 Yan-Hui Zhao Yu-Xin Zhao jian-han liang 《Chinese Science Bulletin》 SCIE EI CAS 2014年第14期1568-1574,共7页
The study has evaluated the coherent structures and the velocity field of gaseous transverse jet upstream of a scramjet flameholder in a supersonic turbulent flow.The high spatiotemporal resolution coherent structures... The study has evaluated the coherent structures and the velocity field of gaseous transverse jet upstream of a scramjet flameholder in a supersonic turbulent flow.The high spatiotemporal resolution coherent structures of the jet plume/wakes and the cavity shear layer were obtained by utilizing the nanoparticle-based planar laser scattering technique.Compared to the no upstream injection case,the cavity shear layer downstream of the jet shows significant mass exchange with mainstream.The particle image velocimetry velocity field and the velocity profiles demonstrated that the interaction intensity of the cavity shear layer with the upstream injection is further enhanced as the injection stagnation pressure increases. 展开更多
关键词 超燃冲压发动机 相互作用强度 火焰稳定器 上游 实验 激光散射技术 横向喷流 相干结构
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Experimental investigation on flow characteristics of a transverse jet with an upstream vortex generator 被引量:1
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作者 Yan-hui ZHAO jian-han liang +3 位作者 Shun-ping ZHANG Hong-yu REN Yu-xin ZHAO Shun-hua YANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2020年第8期636-651,共16页
This paper aims at probing the flow characteristics of a jet in supersonic crossflow(JISC)by installing a vortex generator(VG)upstream of the jet orifice.Nanoparticle planar laser scattering(NPLS)and stereo-particle i... This paper aims at probing the flow characteristics of a jet in supersonic crossflow(JISC)by installing a vortex generator(VG)upstream of the jet orifice.Nanoparticle planar laser scattering(NPLS)and stereo-particle image velocimetry(SPIV)technologies were employed to observe the flowfield,and three cases were designed for comparison.CASE0 stands for JISC without passive VG.In CASE1 and CASE2,VG is installed at 20 mm and 80 mm upstream away from the jet orifice,respectively.Transient flow structures show that two flow modes exist when the VG wake interacts with the JISC.In CASE1,vortices are induced from both sides of the jet plume because of the VG wake.This leads to a complex streamwise vortex system.Penetration and lateral diffusion are enhanced.In CASE2,intermittent large-scale eddies in the VG wake cause large streamwise vortices at the windward side of the jet.The penetration depth is also enhanced while the lateral diffusion is restrained.In addition,experimental results show that the penetration depth is approximately 8.5%higher in CASE1 than that in CASE0,and the lateral diffusion is larger by about 17.0%.In CASE2,the penetration is increased by about 26.2%,while the lateral diffusion is enhanced by just 0.5%. 展开更多
关键词 Vortex generator(VG) Jet in supersonic crossflow(JISC) Penetration depth and lateral diffusion Vortices structures
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