Effects of Spark Discharge Mode in Pulsed Flame Jet Igniter on Oh Fluorescence Images in a Swirl Flow

Murase, Eiichi; Hanada, K.; Hamakawa, T.; Hotta, Kazuhiko

doi:10.1080/00102200490487210

Cited by 2 publications

(1 citation statement)

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“…The PFJ igniter is of the same size and shape as an ordinary spark plug, and it contains a small cavity and an orifice (Murase, 1995;Murase and Hanada, 2001, 2002, 2003Murase et al, 1996Murase et al, , 2004Oppenheim et al, 1990). The fuel injector is connected to the cavity via an insulator and a hollow center electrode.…”

Section: Pulsed Flame Jet (Pfj)mentioning

confidence: 99%

Photographic Observation and Emission Spectral Analysis of Homogeneous Charge Compression Ignition Combustion

Murase

Hanada

Miyaura

et al. 2005

Combustion Science and Technology

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Experimental studies of homogeneous charge compression ignition (HCCI) combustion have been conducted by using a compact rapid compression machine. The image of the cool flame was captured by a high-speed camera with image intensifier, and during the cool flame appearance the Emeleus cool flame band was observed. Then blue flame became evident, its emission spectrum being similar to that of the cool flame with overlapping by HCO bands. During the main heat release duration, the hot flame emission spectrum was observed, where the distinct OH emission appeared, and it was superimposed on the carbon monoxide oxidation continuum. After the main heat release, the broad peak of the spectrum was shifted to the longer-wavelength side, and the images of the flames changed to red, especially at higher equivalence ratios. This red coloration must originate from the H 2 O vibration-rotation bands (580.7-966.9 nm). On the other hand, it has been revealed that a pulsed flame jet (PFJ) has the potential for directly controlling the start of HCCI combustion. In the jet of PFJ, the emission spectrum obtained was composed of distinct OH and CH emissions superimposed on the carbon monoxide oxidation continuum.

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