Water Injection Effects on NOx Emissions for Engines Utilizing Diffusion Flame Combustion Vanderbilt Univ

Format:

Conference/Event

Author/Creator:

Psota, M. A., author.

Conference Name:

International Spring Fuels & Lubricants Meeting & Exposition (1997-05-05 : Dearborn, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1997

Summary:

AbstractInert injection is an often-used technique to reduce NOx emissions from engines. Here the effects of a new Mitsubishi water injection system for a direct injection (DI) Diesel engine on exhaust emissions are examined. Stoichiometric flame temperature correlations of thermal NOx emissions for conventional gas turbine combustors provide an activation energy to form NO of approximately 135 kcal/g-mol, the value for the Zeldovich mechanism with O/O2 equilibrium. Two theoretical limiting temperatures determined to bracket NOx emissions data for gas turbines are computed for the Diesel engine considered here. At low water to fuel ratios, the reductions of NOx for the DI Diesel engine are less than predicted for uniform distribution of an inert throughout the charge, but as the water to fuel ratio is increased the reductions are bounded successfully by the limiting temperatures. The measured reductions are also compared with those in another DI Diesel utilizing split injections; water injection at greater than 30% water to fuel ratio by mass via the hybrid injector is found to be the more effective technique to lower NOx emissions

Notes:

Vendor supplied data

Publisher Number:

971657

Access Restriction:

Restricted for use by site license