Flame-quench distance measurements in a CFR engine

✍ Scribed by A.D. Goolsby; W.W. Haskell

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 585 KB
• Volume: 26
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(76)90060-2

✦ Synopsis

A method has been devised which uses ion probe detection of flames burning through a gap inside the combustion chamber to provide rapid and convenient measurement of two-surface flame-quench distances in an operating engine. This method has been used to establish that such quench distances range from about 0.01 cm to ~0.2 cm, depending in decreasing order on equivalence ratio, manifold pressure, wall temperature, spark timing, and fuel type. A comparison between these experimental findings and the results from one-and two-surface measurements performed by others indicates that two-surface quench values are 2.5 to 12 times greater than one-surface values. The steep dependence on lean equivalence ratio of the measured two-surface quench values imitates to some extent the known behavior of lean hydrocarbon emissions (HCE), but more detailed single-surface quenching data is now needed to fully appreciate the mechanism involved in exhaust HCE.