Accession Number:

AD0769575

Title:

Propagation of Small-Amplitude Wave over the Surface of Powder Burning in a Gas Flow,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• Librovich,V. B.
• Makhviladze,G. M.

Report Date:

1973-10-30

Pagination or Media Count:

14.0

Abstract:

Beginning at a certain threshold velocity value the flow of gases along a burning powder surface affects the rate of combustion. This effect is known as the fanning or erosion combustion effect. It plays an important role in the internal ballistics of solid-propellant rockets. At the present time there are several theoretical explanations for this phenomenon. All of the theories proceed from the premise that the powder surface which is fanned by the gas flow remains flat, while observations of extinguished powder charges show that the powder surface is dotted with waves which have a certain degree of marked periodicity. In this work, the authors study powder combustion in a gas flow in which a periodic small-amplitude wave is propagated across the surface of the powder.

Descriptors:

• (*Combustion
• *Powders)
• Gas flow
• Burning rate
• Oscillation
• USSR
• Translations

Subject Categories:

• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE