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UID:0-266@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20210419T123000

DTEND;TZID=Asia/Jerusalem:20210419T133000

DTSTAMP:20230525T064132Z

URL:https://aerospace.technion.ac.il/events/development-of-combustion-meas
 urement-technique-in-the-infrared-spectrum/

SUMMARY:Development of combustion measurement technique in the infrared spe
 ctrum
DESCRIPTION:Lecturer:Karin Linshitz\n Faculty:Department of Aerospace Engin
 eering\n Institute:Technion – Israel Institute of Technology\n Location:
 https://technion.zoom.us/j/97444605489\n Zoom: \n Abstract: \n Details: \n
  Investigation of the performance of experimental combustion devices relie
 s heavily on proper diagnostics for characterization of operating regimes 
 and validation of numerical modelling predictions. The primary goal of thi
 s work is to develop and implement a measurement system using infrared (IR
 ) spectrum for measurements in combustion environments\, capable of making
  high repetition rate multi-parameter measurements at multiple locations. 
 We use tunable diode laser absorption spectroscopy (TDLAS) in the mid-IR t
 o develop the capability of species and temperature measurements and use t
 his method to characterize a typical flame (Hencken Burner) as well as th
 e exit plane of a model scramjet engine. The measurement targets of prima
 ry interest are H2O concentration and flame temperature\, although the des
 igned system is also capable of NO\, CO2\, and CH2O concentration measurem
 ents. The design and assembly of the laser system is described in detail\,
  with specific attention given to selection of the proper laser wavelength
 s for detection of the four abovementioned species. The spectroscopic mode
 ling is described\, and a code utilizing known transition parameters is de
 veloped to quantify the collected data. Validation results in the Hencken 
 burner demonstrate successful implementation of the measurement technique.
  Finally\, results collected in a scramjet test firing are presented. Expe
 riments using several ethylene fueling strategies were carried out in the 
 scramjet combustor in the Fine Rocket Propulsion Laboratory\, and measurem
 ents of H2O concentration and temperature were taken at the exit plane.  
 Challenges of the implemented measurement technique and future directions 
 for increased accuracy are addressed.\nZoom Meeting
CATEGORIES:Seminars
LOCATION:https://technion.zoom.us/j/97444605489

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