Accession Number:

ADP007960

Title:

Pitot Surveys of Two Moderately Under Expanded Jets,

Descriptive Note:

Corporate Author:

OXFORD UNIV (UNITED KINGDOM) DEPT OF ENGINEERING SCIENCE

Personal Author(s):

• Cain, T. M.
• Jones, T. V.

Report Date:

1990-12-01

Pagination or Media Count:

15.0

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