Autoignition and Combustion of JP-8 and its Surrogates at Moderate Pressures
Abstract
The principal objective of the research is to develop surrogates that will reproduce selected aspects of combustion of JP-8 in laminar non-premixed and premixed flows. Surrogates are mixtures of hydrocarbon compounds. The research was conducted over a period of three years. Experimental, numerical, and analytical studies were carried out. The experimental studies were conducted employing the counterflow configuration. Many hydrocarbon fuels and surrogates were tested. Critical conditions of extinction, critical conditions of autoignition and flame structures were measured. It was found that the Aachen surrogate made up of 80% n-decane and 20% trimethylbenzene by weight, and surrogate C made up of 57% n-dodecane, 21% methylcyclohexane and 22% o-xylene by weight, reproduced key aspects of combustion of jet fuels in laminar premixed and nonpremixed flows. A key finding of this work was that low temperature chemistry plays an important role in promoting autoignition of high molecular weight hydrocarbon compounds. At low values of the strain rate the value of the autoignition temperature decreases with increasing molecular weight. An experimental facility was built for testing aspects of combustion at moderate pressures. Critical conditions of extinction were measured for hydrogen flames at pressures up to 1.5MPa.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 19, 2012
- Accession Number
- ADA578963
Entities
People
- Kalyanasundaram Seshadri
Organizations
- University of California, San Diego