Temperature distribution measurements in an optically accessible single-cylinder engine using phosphor thermometry

Jin, Seong-Ho (2013) Temperature distribution measurements in an optically accessible single-cylinder engine using phosphor thermometry. In: EKC 2013, 24-26 July 2013, Brighton, UK.

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Item Type:Conference or Workshop contribution (Presentation)
Item Status:Live Archive

Abstract

Combustion is the most important process in engine operation; the development of engine technology, therefore, relies upon the advancement of combustion technology. Homogeneous charge compression ignition (HCCI), low temperature combustion (LTC) and controlled auto ignition (CAI) have the potential to allow for better fuel economy and reduced emissions in comparison with spark ignition (SI) combustion. Transient temperature distribution is crucial for understanding combustion, especially heat and mass transfer as well as the chemical reactions of combustion. The authors attempt to measure 2D gas temperature distribution using phosphor thermometry techniques in a single-cylinder optical engine. The intensity ratio method from phosphorescence was employed to measure the temperature distribution. Dy:YAG phosphor was used as seeding particle, and excited by the 3rd harmonic of an Nd:YAG laser at a wavelength of 355nm. The phosphorescence was then captured by an ICCD camera connected to an image doubler. The relationship between the intensity ratios of the two wavelengths and therefore temperature were calculated. The temperature distribution of the compression stroke was measured and compared with the mean temperature calculated from in-cylinder pressure data. The results suggest that this technique can be used for 2D gas-phase temperature measurement. This technique was also used for combustion temperature measurement. The mean temperature from phosphorescence is generally consistent with the mean temperature calculated from in-cylinder pressure in the pre- and post-combustion processes.

Keywords:Phosphor thermometry, Transient temperature distribution, Homogeneous charge compression ignition (HCCI), Low temperature combustion (LTC), Controlled auto ignition (CAI)
Subjects:H Engineering > H330 Automotive Engineering
H Engineering > H141 Fluid Mechanics
H Engineering > H800 Chemical, Process and Energy Engineering
H Engineering > H311 Thermodynamics
Divisions:College of Science > School of Engineering
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ID Code:31206
Deposited On:27 Apr 2018 15:12

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