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 : SEP 1975

Pagination or Media Count : 55

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