High spatiotemporal frame-straddling focusing schlieren imaging in a scramjet engine

Zhao, Zhixin1; Wang, Xiaolong1,2; Chen, Mingjia1; Wang, Ze1; Li, Fan3; Sun, Mingbo3; Zhu, Jiajian3; Zhou, Bo1

2024-11-01

10.1088/1361-6501/ad6c6e

MEASUREMENT SCIENCE AND TECHNOLOGY   影响因子和分区

0957-0233

1361-6501

Flow visualization in harsh environments such as a scramjet combustor featuring highly turbulent supersonic reactive flow with intensive luminescence emission is challenging and typically lack of sufficient spatiotemporal resolution that is essential for resolving flow dynamics. This study presents a development of a robust flow visualization technique with an exceptional spatiotemporal resolution in a scramjet combustor. By utilizing a customized LED light source, the short pulse duration along with a high peak power and a single-color emission ensures an instantaneous exposure with little background luminescence interference. Focusing schlieren image measurements with mitigated path-integration effect are successfully demonstrated in a scramjet engine combustor at instant, frame-straddling, and sequential temporal resolutions of 100 ns, 500 ns, and 26 mu s, respectively, along with a megapixel imaging resolution. Consequently, in addition to flow visualization, it is worth highlighting that the exceptional spatiotemporal correlation resolved by present measurements exhibits attractive potentials of velocimetry for harsh high-speed flow environments.

scramjet combustor flow visualization spatiotemporal resolution frame-straddling focusing schlieren image

SCI ; EI

英语

第一 ; 通讯

NSFC[52206150]

Engineering ; Instruments & Instrumentation

Engineering, Multidisciplinary ; Instruments & Instrumentation

WOS:001291513400001

IOP Publishing Ltd

Web of Science

1.Southern Univ Sci & Technol, Coll Engn, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
2.Peking Univ, Collaborat Innovat Ctr Adv Aeroengines, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
3.Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Scramjet Lab, Changsha 410073, Peoples R China

Zhao, Zhixin,Wang, Xiaolong,Chen, Mingjia,et al. High spatiotemporal frame-straddling focusing schlieren imaging in a scramjet engine[J]. MEASUREMENT SCIENCE AND TECHNOLOGY,2024,35(11).

Zhao, Zhixin.,Wang, Xiaolong.,Chen, Mingjia.,Wang, Ze.,Li, Fan.,...&Zhou, Bo.(2024).High spatiotemporal frame-straddling focusing schlieren imaging in a scramjet engine.MEASUREMENT SCIENCE AND TECHNOLOGY,35(11).

Zhao, Zhixin,et al."High spatiotemporal frame-straddling focusing schlieren imaging in a scramjet engine".MEASUREMENT SCIENCE AND TECHNOLOGY 35.11(2024).