Accession Number : AD0764613

Title :   Generation of a Vortex Ring by the Sudden Combustion of Gas

Descriptive Note : Technical rept.

Corporate Author : URS RESEARCH CO SAN MATEO CA

Personal Author(s) : Kriebel, Anthony R

PDF Url : AD0764613

Report Date : Jul 1973

Pagination or Media Count : 27

Abstract : Tests were run to investigate the feasibility of generating air vortex rings by the rapid combustion and expansion of propane-air mixtures near the bottom of a short cylinder to drive the air out of the cylinder. A total of 52 such tests were run with various amounts of propane. The gas mixtures ignited for 48 of these tests. Only slow speed vortex rings were generated, however, and these occurred only when the volume of burned gas was much greater than required to fill the cylinder. When less gas was burned, the air which was expelled from the cup did not form a vortex ring and propagate away from the cup. The reason for this apparently that the mixing of the propane and air was so poor that the combustion and expansion was too slow to impart enough kinetic energy to the expelled gases.

Descriptors :   *COMBUSTION, *VORTICES, AIR, GAS FLOW, PRODUCTION, PROPANE

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE