Flow Modulation and Mixing Enhancement of Highly Underexpanded Jet by Vortex Excitation

doi:10.2514/1.J058476

	Flow Modulation and Mixing Enhancement of Highly Underexpanded Jet by Vortex Excitation
	Wang Y(汪也)1,2; Wu K(吴坤)1,2; Yao W(姚卫)1,2 ; Fan XJ(范学军)1,2
通讯作者	Fan, Xuejun(xfan@imech.ac.cn)
发表期刊	AIAA JOURNAL
	2020-06-01
卷号	58 期号:6 页码:2462-2474
ISSN	0001-1452
摘要	A highly underexpanded jet with a nozzle pressure ratio of 5.60 is excited by a vortex excitation. Modulations on flow characteristics by the vortex excitation are revealed by comparing the excited jet with the free jet through a large-eddy simulation (LES) technique. The modeling results have achieved good agreements with the available literature data in terms of time-averaged near-field variables, Mach disk dimensions, and dominant frequencies. A grid-convergence study is also performed to verify the fidelity of LES results. Ultimately, qualitative and quantitative comparisons of mean and instantaneous jet fields are conducted. It is demonstrated that the vortex excitation has enhanced the mixing of the injection nitrogen with the environment by a considerably increased mixing level and a faster mixing process in the middle jet. The vortex excitation modulates the buildup process of shocks and vortex structures, resulting in an intensified shock/shear-layer interaction and an accelerated turbulence transition process, which combine to improve mixing efficiency. The dominant instability mode is altered to a higher-order multiple helical mode from a single helical mode, and an intensified screech tone is achieved by the vortex excitation.
DOI	10.2514/1.J058476
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000537952100010
关键词[WOS]	LARGE-EDDY SIMULATION ; INSTABILITY ; STRATEGIES ; STABILITY ; COMBUSTOR ; BREAKDOWN ; VORTICES ; INJECTOR ; FIELDS
WOS研究方向	Engineering
WOS类目	Engineering, Aerospace
资助项目	National Natural Science Foundation of China[11502270] ; Training Program of the Major Research Plan of the National Natural Science Foundation of China[91641110]
项目资助者	National Natural Science Foundation of China ; Training Program of the Major Research Plan of the National Natural Science Foundation of China
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Fan, Xuejun
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/82141
专题	高温气体动力学国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang Y,Wu K,Yao W,et al. Flow Modulation and Mixing Enhancement of Highly Underexpanded Jet by Vortex Excitation[J]. AIAA JOURNAL,2020,58,6,:2462-2474.
APA	汪也,吴坤,姚卫,&范学军.(2020).Flow Modulation and Mixing Enhancement of Highly Underexpanded Jet by Vortex Excitation.AIAA JOURNAL,58(6),2462-2474.
MLA	汪也,et al."Flow Modulation and Mixing Enhancement of Highly Underexpanded Jet by Vortex Excitation".AIAA JOURNAL 58.6(2020):2462-2474.

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