Kinetics Studies of ARO-Relevant Fuels Using Shock Tube/Laser Absorption Methods
Abstract
We propose a program to advance the development of compact kinetic mechanisms for Army-relevant fuels using modern shock tube methods comprised of in situ laser absorption and GC analysis of extracted gas samples. This study will provide the needed experimental database for the development, validation and refinement of compact chemical mechanisms for hydrocarbon fuel pyrolysis and oxidation, such as the HyChem model introduced at Stanford by Prof. Hai Wang. This approach, and the parallel effort by Josette Bellan at JPL, seek to establish compact, reduced mechanisms that are physics-based and well-suited for modeling practical combustors and engines. The fuels to be studied will be various neat hydrocarbons, such as heptane and dodecane, and real fuels (jet fuels). The specific set of fuels will be chosen in consultation with other workers in the area (e.g. Bellan, Brezinsky, Wang) in order to provide the most useful targets for model development and validation. Particular goals of this study will be to compare data acquired in the Brezinsky UIC single-pulse shock tube (with GC analysis) and the Stanford shock tubes (with laser absorption and GC monitoring), and to provide data for input to and valuation of the mechanisms of Bellan and Wang. The proposed research is innovative and fundamental and should have high impact in accelerating development of compact kinetic models. Most of the work would be done in our ARO-sponsored long-test-time shock tube, but some aspects will be carried out on one or more of the other four shock tubes in our laboratory, e.g. our high-pressure shock tube that allows studies up to and exceeding 100 atm, and a new imaging shock tube. The anticipated range of the studies is 1-50 atm and 700-1700 K. Work will progress throughout the contract continually, starting first with an initial characterization of one archetypal fuel, in Year 1, and an effort to generate a HyChem model for this fuel. This early work will also initiate the collaborative process with Brezinsky, Bellan and Wang, ensuring from the beginning that the research targets explicitly assist real-fuel model development. It is expected that in the following years, a wider range of fuels will be studied. In addition, as new laser absorption diagnostics and GC capabilities for other species come on-line, these will be added to the multi-species time-history database. Approved for Public Release.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 11, 2018
- Source ID
- W911NF1710420
Entities
People
- Ronald Kent Hanson
Organizations
- Army Contracting Command
- Stanford University
- United States Army