Accession Number : ADP007960

Title :   Pitot Surveys of Two Moderately Under Expanded Jets,

Corporate Author : OXFORD UNIV (UNITED KINGDOM) DEPT OF ENGINEERING SCIENCE

Personal Author(s) : Cain, T. M. ; Jones, T. V.

Report Date : DEC 1990

Pagination or Media Count : 15

Abstract : In the free expansion of the exhaust gases of engines flying at altitudes suitable for air-breathing launchers, the turbulent shear layers interact with the jet shock structure, posing a challenge for CFD. A series of experiments in this flow regime is performed to provide data suitable for code validation. Angular and axial Pitot surveys of heated, high pressure, nitrogen jets exhausted from a Mach 3 conical nozzle into a low pressure tank are presented. The results indicate that there is strong turbulent mixing throughout the flowfield downstream of the first Mach disk in addition to a repetitive shock cell structure.

Descriptors :   *EXHAUST GASES, *EXPANSION, *ROCKET EXHAUST, *EXHAUST PLUMES, *LIQUID JETS, *ROCKET LAUNCHERS, ADDITION, AIR, AIR BREATHING, ALTITUDE, CELL STRUCTURE, CELLS, CONICAL NOZZLES, DISKS, ENGINES, FLOW, HIGH PRESSURE, LAUNCHERS, LAYERS, LOW PRESSURE, MIXING, NITROGEN, NOZZLES, PRESSURE, PRESSURE VESSELS, RESPIRATION, SHOCK, STRUCTURES, SURVEYS, VALIDATION, FLOW FIELDS.

Subject Categories : Combustion and Ignition
      Rockets

Distribution Statement : APPROVED FOR PUBLIC RELEASE