Accession Number:

AD0770070

Title:

Initiation, Stability and Limits of Detonation for Advanced Stable/Air- Breathing and Hybrid Propulsion Engine Design

Descriptive Note:

Final rept.

Corporate Author:

GOETTINGEN UNIV (GERMANY F R) INST FUER PHYSIKALISCHE CHEMIE

Personal Author(s):

Report Date:

1973-07-31

Pagination or Media Count:

27.0

Abstract:

During this period research was carried out on the influence of initial conditions on limits of detonability in hydrocarbon-air mixtures, with emphasis on the influence of detonation tube shape. Experimental results for circular cross-section tubes indicated that the detonation limit is a linear function of reciprocal tube diameter. For square cross-section tubes experimental results obtained seem to indicate that the limits of detonability are slightly wider than for circular, and neither hydraulic radius, tube area, or narrowest tube dimension determines limits of detonability. However, measurements in rectangular tubes with various cross sections seem to indicate that for rectangular cross section tubes there exists a very close correlation between the limits of detonability and the narrowest hydraulic diameter of the tube, as long as one side is not too narrow.

Subject Categories:

  • Combustion and Ignition
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE