Accession Number : AD1017078

Title :   Combustion of High Molecular Weight Hydrocarbon Fuels and JP-8 at Moderate Pressures

Descriptive Note : Technical Report,01 May 2012,30 Apr 2016

Corporate Author : University of California - San Diego La Jolla United States

Personal Author(s) : Seshadri,Kalyanasundaram

Full Text :

Report Date : 26 Jul 2016

Pagination or Media Count : 94

Abstract : The objective of this research is to characterize combustion of high molecular weight hydrocarbon fuels and jet-fuels (in particular JP-8) and surrogates of jet-fuels in laminar non-uniform flows at elevated pressures up to 2.5 M Pa. Experimental and kinetic modeling studies were carried out. Measurements include critical conditions of extinction and autoignition, and flame structure. The scientific questions that were addressed and answered are (1) How does pressure influence the critical conditions of extinction and autoignition? (2) What surrogate best reproduces selected combustion characteristics of JP-8 at atmospheric and moderate pressure? (3) What are possible chemical kinetic mechanisms for these surrogates? (4) What is the influence of pressure on kinetic models. The concise answer to these questions are (1)With increasing pressure strain rates at extinction in general decrease. Autoignition temperature decrease with increasing pressure. A key observation that was not known prior to this work was that the influence of low-temperature chemistry increase with increasing pressure. (2)Surrogates of JP-8 were identified, (3) Chemical kinetic mechanisms were developed and tested. (4) Revisions were made to chemical kinetic mechanisms.

Descriptors :   COMBUSTION , KINETICS , JET ENGINE FUELS , AUTOIGNITION , MOLECULAR WEIGHT , PRESSURE , HYDROCARBON FUELS , TEMPERATURE , dielectric gases , fluid flow , burning rate , fluid dynamics , ignition systems , cyclic hydrocarbons , alkanes , computational fluid dynamics , chemical reactions

Distribution Statement : APPROVED FOR PUBLIC RELEASE