Accession Number:

ADA180842

Title:

Rapid Vaporization and Heating of Two Parallel Fuel Droplet Streams

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV IRVINE DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1986-04-01

Pagination or Media Count:

33.0

Abstract:

An analysis is presented of the mechanisms of heat transfer and vaporization in an idealized two-dimensional fuel spray consisting of two parallel droplet streams injected in a hot gas. With the assumption of a constant relative velocity between the gas and liquid phases inviscid approximation, a system of partial differential equations with linear operators and non-linear source terms is obtained. With the use of Greens functions, this system is transformed into a group of non-linear ordinary differential equations and integral equations which are readily solved with numerical techniques. The dimensionless groups influencing the problem are identified and a discussion is presented of the effects of four relevant parameters including a vaporization- diffusion time ratio, a liquid-gas mass flow ratio, a Spalding transfer number, and a Reynolds number. The method yields qualitatively correct estimates of the behavior of the gas and liquid phases which may serve as guidelines in the development of costlier numerical schemes. Keywords Spray Combustion Ignition Flames Propagation.

Subject Categories:

  • Combustion and Ignition
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE