Translational Temperature Measurements in a Shock Layer by Point-Measurement Laser Absorption Spectroscopy

2015 ◽  
Vol 29 (4) ◽  
pp. 649-652
Author(s):  
Satoshi Nomura ◽  
Kimiya Komurasaki
Keyword(s):  
Absorption Spectroscopy ◽  
Shock Layer ◽  
Temperature Measurements ◽  
Laser Absorption Spectroscopy ◽  
Point Measurement ◽  
Translational Temperature ◽  
Laser Absorption ◽  
Measurement Laser

In-Cylinder Temperature Measurements in a 55-cm3 Two-Stroke Engine Via Tunable Laser Absorption Spectroscopy

2020 ◽  
Vol 142 (9) ◽  
Author(s):  
Joseph K. Ausserer ◽  
Marc D. Polanka ◽  
Matthew J. Deutsch ◽  
Jacob A. Baranski ◽  
Keith D. Rein
Keyword(s):  
Absorption Spectroscopy ◽  
Ideal Gas ◽  
Operating Conditions ◽  
Temperature Measurements ◽  
Cylinder Pressure ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Ideal Gas Model ◽  
Stroke Engine ◽  
The Ideal

Abstract In-cylinder temperature is a critical quantity for modeling and understanding combustion dynamics in internal combustion engines (ICEs). It is difficult to measure in small, two-stroke engines due to high operational speeds and limited space to install instrumentation. Optical access was established in a 55-cm3 displacement two-stroke engine using M4 bolts as carriers for sapphire rods to establish a 1.5-mm diameter optical path through the combustion chamber. Temperature laser absorption spectroscopy was successfully used to measure time varying in-cylinder temperature clocked to the piston position with a resolution of 3.6 crank angle degrees (CAD) at 6000 rpm. The resulting temperature profiles clearly showed the traverse of the flame front and were qualitatively consistent with in-cylinder pressure, engine speed, and delivery ratio. The temperature measurements were compared to aggregate in-cylinder temperatures calculated using the ideal gas model using measured in-cylinder pressure and trapped mass calculated at exact port closure as inputs. The calculation was sensitive to the trapped mass determination, and the results show that using the ideal gas model for in-cylinder temperature calculations in heat flux models may fail to capture trends in actual in-cylinder temperature with changing engine operating conditions.

scholarly journals Temperature measurements based on tunable diode laser absorption spectroscopy

2012 ◽  
Vol 61 (23) ◽  
pp. 234204
Author(s):  
Xu Zhen-Yu ◽  
Liu Wen-Qing ◽  
Liu Jian-Guo ◽  
He Jun-Feng ◽  
Yao Lu ◽  
...  
Keyword(s):  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Temperature Measurements ◽  
Tunable Diode Laser ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Diode Laser Absorption

INTRACAVITY LASER ABSORPTION SPECTROSCOPY OF NO2 AND CH4 COOLED IN A SLIT JET SUPERSONIC EXPANSION

1991 ◽  
Vol 01 (C7) ◽  
pp. C7-471-C7-476
Author(s):  
A. CAMPARGUE ◽  
M. CHENEVIER ◽  
A. DELON ◽  
R. JOST ◽  
F. STOECKEL
Keyword(s):  
Absorption Spectroscopy ◽  
Laser Absorption Spectroscopy ◽  
Supersonic Expansion ◽  
Laser Absorption ◽  
Intracavity Laser
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