Measurement of supersonic jet screech with focused laser differential interferometry

被引：8
|
作者：
Price, Theron J. [1 ]
Gragston, Mark [1 ]
Schmisseur, John D. [1 ]
Kreth, Phillip A. [1 ]
机构：
[1] Univ Tennessee, Inst Space, Dept Mech Aerosp & Biomed Engn, Tullahoma, TN 37388 USA
来源：
APPLIED OPTICS | 2020年 / 59卷 / 28期
关键词：
NOISE;
D O I：
10.1364/AO.402011
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Focused laser differential interferometry (FLDI) is used to measure a well-characterized, 17 kHz screech tone emitted from an underexpanded Mach 1.5 jet. Measurements are made at numerous spatial locations in and around the jet flow-field, where intrusive diagnostics would otherwise influence the flow-field. Results from FLDI measurements are shown to agree with measurements from microphones and analyses of high-speed schlieren. The agreement is used to demonstrate FLDI is a valid and accurate technique for measuring screech tones in jet flowfields, and furthermore that FLDI can be used to measure jet screech at various spatial locations around the jet, and notably inside of the jet, where microphones and other intrusive diagnostics cannot be used effectively. (C) 2020 Optical Society of America
引用
收藏
页码：8902 / 8908
页数：7
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