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Published in:
2019 | OriginalPaper | Chapter
Shock Tube Study of Nitric Oxide Addition on Ignition Delay Time of n-Dodecane/Air Mixture
Authors : Jiankun Shao, Yangye Zhu, Chris Almodovar, David F. Davidson, Ronald K. Hanson
Published in: 31st International Symposium on Shock Waves 1
Publisher: Springer International Publishing
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Abstract
In engine applications, small concentrations of very reactive chemical species such as nitric oxide (NO) can have a very important impact on the onset of combustion. The small amount of NO can come from various sources including EGR, residual gas, and vitiated oxidizer streams. Combustion of distillate fuels and their surrogates with NO addition affects many practical propulsion and power systems and is of particular interest in gas turbines. As part of our efforts to understand these phenomena, shock tube ignition delay times have been studied for n-dodecane/air mixtures with the addition of 500 ppm and 1000 ppm NO over temperatures of 1083–750 K, near 30 atm and ϕ = 1. Laser absorption was used to quantify in situ fuel and NO concentrations. The current ignition delay time measurements should provide needed targets for NO addition model development and refinement.