Intrusive effects of repetitive laser pulsing in high-speed tracer-LIF measurements

Papageorge, Michael J.; Sutton, Jeffrey A.

doi:10.1007/s00348-017-2323-0

Cited by 9 publications

(2 citation statements)

References 87 publications

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“…Gierczak et al 11 reported a 42% decrease in acetone fluorescence (as strictly marked by the formation of CO) for p ace ¼ 0.001 atm and laser energy of 1.7 mJ/pulse over 1000 shots, which also qualitatively agrees with this work. For photolysis results using other tracers such as 3-pentanone and biacetyl, refer to Papageorge and Sutton 18 and Petersen et al 19 Therefore, photolysis will be negligible at 282 nm excitation for the current work. For the rest of the static cell experiments, the shot count was kept below 1000.…”

Section: Photolysismentioning

confidence: 99%

System Validation Experiments for Obtaining Tracer Laser-Induced Fluorescence Data at Elevated Pressure and Temperature

et al. 2017

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This paper presents a set of system validation experiments that can be used to qualify either static or flow experimental systems for gathering tracer photophysical data or conducting laser diagnostics at high pressure and temperature in order to establish design and operation limits and reduce uncertainty in data interpretation. Tests demonstrated here quantify the effect of tracer absorption at the test cell walls, stratification, photolysis, pyrolysis, adequacy of mixing and seeding, and reabsorption of laser light using acetone as the tracer and 282 nm excitation. Results show that acetone exhibits a 10% decrease in fluorescence signal over 36 000 shots at 127.4 mJ/cm, and photolysis is negligible below 1000 shots collected. Meanwhile, appropriately chosen gas residence times can mitigate risks due to pyrolysis and inadequate mixing and seeding; for the current work 100 ms residence time ensured <0.5% alteration of tracer number density due to thermal destruction. Experimental results here are compared to theoretical values from the literature.

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Section: Photolysismentioning

confidence: 99%

System Validation Experiments for Obtaining Tracer Laser-Induced Fluorescence Data at Elevated Pressure and Temperature

et al. 2017

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“…Combustion instabilities have been identi ed as a key focus of detrimental instabilities in many applications, such as rockets (Zhao et Fuel/air mixing is particularly important from the perspective of thermodynamic and emission performance (Karthick et al 2017;Papageorge et al 2017). Meanwhile, mixedness is a leading quantity that re ects the mixing state of a system prior to ignition and will determine the causes of failed and successful ignition (Connor et al 2018;Sharaborin et al 2021).…”

Section: Introductionmentioning

confidence: 99%