IMECH-IR  > 高温气体动力学国家重点实验室
Numerical investigation of characteristic frequency excited highly underexpanded jets
Li XP; Fan E; Yao W(姚卫); Fan XJ(范学军); Fan, XJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.; Fan, XJ (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
Source PublicationAEROSPACE SCIENCE AND TECHNOLOGY
2017-04-01
Volume63Pages:304-316
ISSN1270-9638
Abstract

A highly underexpanded jet with a nozzle pressure ratio of 5.60 is excited simultaneously by the inherent characteristic frequencies in the steady jet of 14.569 kHz 37.086 kHz and 45.695 kHz as well as other two reference frequencies of 1.0 kHz and 40.0 kHz. The flow characteristic of the excited jets is revealed by comparing to the steady jet using large eddy simulation technique. For low-frequency excitation (fe = 1.0 kHz) the flow and acoustic fields of the forcing jet are similar with the steady jet. However when the jet is excited by high frequencies the acoustic source moves to the nozzle exit and the jet potential core together with the near-field shocks oscillate periodically at the excitation frequency. The excitation at fe = 1.0 kHz increases the mixing area since y/D = 24 from the nozzle exit which is contrary to the effect of other high frequencies that enhances the mixing in the near-field region but decreases the mixing area since y/D = 18. The peak frequency of the excited jets generally becomes identical to the excitation frequency once being excited except the fe = 1.0 kHz and h = 40.0 kHz jets. High-order harmonics of the dominant frequency are observed in the pressure spectrum of jets excited by high frequencies and the dominant mode turns into the axisymmetric mode from the original helical one accordingly. In particular forcing the jet with the axisymmetric mode of h = 14.569 kHz provides the fewest shock cells but the largest amplitude in shock oscillation the most harmonics in the spectrum and the largest mixing area within 8 < y/D < 12. 2017 Elsevier Masson SAS. All rights reserved.

KeywordFuel Jets Underexpanded Jets Jet Mixing Control Excited Jets Large Eddy Simulation
DOI10.1016/j.ast.2017.01.005
Indexed BySCI ; EI
Language英语
WOS IDWOS:000395960200029
WOS KeywordLARGE-EDDY SIMULATION ; SUPERSONIC JET ; CROSS-FLOW ; PULSED JETS ; CENTRAL SCHEMES ; TRANSVERSE JET ; CIRCULAR JETS ; HIGH-SPEED ; INJECTOR ; CONFIGURATION
WOS Research AreaEngineering
WOS SubjectEngineering, Aerospace
Funding OrganizationNational Natural Science Foundation of China(11502270) ; China Postdoctoral Science Foundation(2016M591258)
DepartmentLHD超声速燃烧
Classification一类
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60562
Collection高温气体动力学国家重点实验室
Corresponding AuthorFan, XJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.; Fan, XJ (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Li XP,Fan E,Yao W,et al. Numerical investigation of characteristic frequency excited highly underexpanded jets[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2017,63:304-316.
APA Li XP,Fan E,姚卫,范学军,Fan, XJ ,&Fan, XJ .(2017).Numerical investigation of characteristic frequency excited highly underexpanded jets.AEROSPACE SCIENCE AND TECHNOLOGY,63,304-316.
MLA Li XP,et al."Numerical investigation of characteristic frequency excited highly underexpanded jets".AEROSPACE SCIENCE AND TECHNOLOGY 63(2017):304-316.
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