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Title: Analysis and screening tools for ducted fuel injection studies.


Abstract not provided.

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Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the Symposium.
Country of Publication:
United States

Citation Formats

Ruth, Daniel, Gehmlich, Ryan K., and Mueller, Charles J.. Analysis and screening tools for ducted fuel injection studies.. United States: N. p., 2016. Web.
Ruth, Daniel, Gehmlich, Ryan K., & Mueller, Charles J.. Analysis and screening tools for ducted fuel injection studies.. United States.
Ruth, Daniel, Gehmlich, Ryan K., and Mueller, Charles J.. 2016. "Analysis and screening tools for ducted fuel injection studies.". United States. doi:.
title = {Analysis and screening tools for ducted fuel injection studies.},
author = {Ruth, Daniel and Gehmlich, Ryan K. and Mueller, Charles J.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7

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  • Abstract not provided.
  • In 1982 over 500 million cubic feet per day of nitrogen was injected into oil or gas reservoirs. To date, thirty fields have utilized nitrogen for enhanced oil or gas recovery (EOR/EGR). In this paper, 29 nitrogen EOR/EGR projects are listed. Some pertinent reservoir, rock and fluid data as well as historical information and injection rates are given for each field. Based on the literature and the analysis of these 29 fields, five applications of nitrogen are indicated: immiscible displacement, miscible displacement, gravity drainage enhancement, pressure maintenance and as a driving fluid for a miscible slug. No single nitrogen application,more » however, is mutually exclusive in any field; two or more mechanisms (applications) may be involved. For each application a specific field was chosen as an example and more detail was provided. A screening guide has been used for each application. Most of the 29 fields fall within these guidelines for the respective nitrogen applications.« less
  • Laser-induced iodine fluorescence has been used to generate two-dimensional images of the mixing characteristics of air injected transversely as underexpanded jets behind a rearward-facing step into a ducted Mach 2 freestream; the images thus obtained were processed digitally in order to yield planar-injectant mole fraction distributions. The resulting planar images represent a three-dimensional data base of the injectant mole fraction distribution throughout the flowfield which is then used to reconstruct images exhibiting mole-fraction distributions normal to the duct. These images furnish a direct representation of the evolution of supersonic mixing along the duct, and facilitate the development of one-dimensional mixingmore » schedules on the basis of the three-dimensional data base. 24 refs.« less
  • Designers of direct-injection compression-ignition engines use a variety of strategies to improve the fuel/charge-gas mixture within the combustion chamber for increased efficiency and reduced pollutant emissions. Strategies include the use of high fuel-injection pressures, multiple injections, small injector orifices, flow swirl, long-ignition-delay conditions, and oxygenated fuels. This is the first journal publication paper on a new mixing-enhancement strategy for emissions reduction: ducted fuel injection. The concept involves injecting fuel along the axis of a small cylindrical duct within the combustion chamber, to enhance the mixture in the autoignition zone relative to a conventional free-spray configuration (i.e., a fuel spray thatmore » is not surrounded by a duct). Finally, the results described herein, from initial proof-of-concept experiments conducted in a constant-volume combustion vessel, show dramatically lower soot incandescence from ducted fuel injection than from free sprays over a range of charge-gas conditions that are representative of those in modern direct-injection compression-ignition engines.« less
  • The U.S. Nuclear Regulatory Commission (NRC) is currently proposing a rulemaking designated as 10 CFR 50.46c to revise the loss-of-coolant accident (LOCA)/emergency core cooling system acceptance criteria to include the effects of higher burnup on fuel/cladding performance. We propose a demonstration problem of a representative four-loop PWR plant to study the impact of this new rule in the US nuclear fleet. Within the scope of evaluation for the 10 CFR 50.46c rule, aspects of safety, operations, and economics are considered in the industry application demonstration presented in this paper. An advanced safety analysis approach is used, by integrating the probabilisticmore » element with deterministic methods for LOCA analysis, a novel approach to solving these types of multi-physics, multi-scale problems.« less