Shock oscillation in highly underexpanded jets | |
Li XP; Zhou R; Chen XP; Fan XJ(范学军); Xie GS | |
发表期刊 | CHINESE PHYSICS B |
2018-09-01 | |
卷号 | 27期号:9页码:94705 |
ISSN | 1674-1056 |
摘要 | The oscillatory motions of shocks in highly underexpanded jets with nozzle pressure ratios of 5.60, 7.47, 9.34, and 11.21 are quantitatively studied by using large eddy simulation. Two types of shock oscillations are observed: one is the Mach disk oscillation in the streamwise direction and the other is the shock oscillation in the radial direction. It is found that the Mach disk moves quickly in the middle of the oscillatory region but slowly at the top or bottom boundaries. The oscillation cycles of Mach disk are the same for different cases, and are all dominated by an axisymmetric mode of 5.298 kHz. For the oscillation in the radial direction, the shocks oscillate more toward the jet centerline but less in the jet shear layer, and the oscillation magnitude is an increasing function of screech amplitude. The cycles of the radial shock oscillation switch randomly between the two screech frequencies for the first two cases. However, the oscillation periodicity is more complex for the jets with high nozzle pressure ratios of 9.34 and 11.21 than for the jets with the low nozzle pressure ratios of 5.6 and 7.47. In addition, the shock oscillation characteristics are also captured by coarse mesh and Smagorinsky model, but the coarse mesh tends to predict a slower and weaker shock oscillation. |
关键词 | highly underexpanded jets shock oscillation large eddy simulation |
DOI | 10.1088/1674-1056/27/9/094705 |
URL | 查看原文 |
收录类别 | SCI ; EI ; CSCD |
语种 | 英语 |
WOS记录号 | WOS:000445021100005 |
关键词[WOS] | LARGE-EDDY SIMULATION ; UNDER-EXPANDED HYDROGEN ; SUPERSONIC JET ; METHANE JETS ; SCREECH ; NOISE ; PRESSURE ; ENGINES ; FLOWS ; FIELD |
WOS研究方向 | Physics, Multidisciplinary |
WOS类目 | Physics |
项目资助者 | National Natural Science Foundation of China [11602028] ; Science and Technology Project of General Administration of Quality Supervision Inspection and Quarantine of China [2017QK119, 2017QK188] |
CSCD记录号 | CSCD:6342848 |
论文分区 | Q3 |
力学所作者排名 | 4 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/77940 |
专题 | 高温气体动力学国家重点实验室 |
作者单位 | 1.China Special Equipment Inspect & Res Inst, Beijing 100029, Peoples R China 2.Inst Appl Phys & Computat Math, Lab Computat Phys, Beijing 100094, Peoples R China 3.Zhejiang Sci Tech Univ, Key Lab Fluid Transmiss Technol Zhejiang Prov, Hangzhou 310018, Zhejiang, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Li XP,Zhou R,Chen XP,et al. Shock oscillation in highly underexpanded jets[J]. CHINESE PHYSICS B,2018,27,9,:94705. |
APA | Li XP,Zhou R,Chen XP,Fan XJ,&Xie GS.(2018).Shock oscillation in highly underexpanded jets.CHINESE PHYSICS B,27(9),94705. |
MLA | Li XP,et al."Shock oscillation in highly underexpanded jets".CHINESE PHYSICS B 27.9(2018):94705. |
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