Accession Number:

ADA017685

Title:

An Analysis of Non-Constant Area Heat Addition Due to Combustion in a Supersonic Air-Stream.

Descriptive Note:

Interim rept. 1 Jul 74-30 Jun 75,

Corporate Author:

CRANFIELD INST OF TECH (ENGLAND) SCHOOL OF MECHANICAL ENGINEERING

Personal Author(s):

• Cookson,Roy A.

Report Date:

1975-09-01

Pagination or Media Count:

55.0

Abstract:

A condition critical to the occurrence of ignition in a ducted supersonic stream has been proposed. By utilizing this concept as a further boundary condition, a new approach to the solution of the gas dynamic equations relevant to combustion in a ducted supersonic stream has been made. This approach involves the duct characteristic with which to describe the combustion process. For engineering, a duct law has been found to satisfy the system of equations it can be considered to be the additional equation required to close the problem. The above temperature-area relationship, which established the critical Mach number at which thermal choking occurs as unity, can be used as an alternative to the Crocco pressure-area relationship which predicts a non-unity critical Mach number.

Descriptors:

• *Supersonic combustion
• *Gas dynamics
• *Ducts
• Equations
• Mathematical models
• Ignition
• Thermal properties
• Criticality
• Heat transfer
• Blocking
• Pressure
• Fuels
• Great Britain

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE