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
机构:
Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
Marsh, Andrew W.
Kramer, Alice N.
论文数: 0引用数: 0
h-index: 0
机构:
Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
Kramer, Alice N.
Maranto, Kevin N.
论文数: 0引用数: 0
h-index: 0
机构:
Georgia Inst Technol, Daniel Guggenheim Sch Aerosp Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
Maranto, Kevin N.
Mazumdar, Yi Chen
论文数: 0引用数: 0
h-index: 0
机构:
Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA