Accession Number:

ADA066595

Title:

Study of the Exhaust Plume for Highly Underexpanded Supersonic Nozzles Exhausting Into Quiescent Air.

Descriptive Note:

Final rept. Jul 77-Sep 78,

Corporate Author:

TEXAS UNIV AT AUSTIN DEPT OF AEROSPACE ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s):

• Sutter,Samuel J.
• Bertin,John J.
• Zihlman,Edward J. , Jr.
• Dannemiller,David P.

Report Date:

1979-01-01

Pagination or Media Count:

76.0

Abstract:

To optimize the performance of a tube launched rocket system, the mechanism which generates the flow in the annular gap must be accurately modeled during the system design phase. The present program defines the exhaust plume which results when an underexpanded, supersonic steam exhausts into quiescent air. The free plumes of three different nozzle geometrical configurations are compared with theoretical method-of-characteristic solutions. The results are a foundation upon which the tube-launched rocket designer may base decisions regarding the fabrication of hardware which will successfully control the flow in the annular gap. The report also discusses the current attributes and shortcomings of the Universitys numerical codes and provides a range of empirical data with which to evaluate future developments in the codes and to make assessments of cntinued rocket system advancements. Author

Descriptors:

• *FLOW FIELDS
• *EXHAUST PLUMES
• *ROCKET LAUNCHERS
• AIR FLOW
• NUMERICAL ANALYSIS
• BOUNDARY LAYER
• FREE FIELD
• DATA ACQUISITION
• SUPERSONIC FLOW
• EXITS
• TEST FACILITIES
• CONICAL NOZZLES
• SHEAR TESTS
• ANNULAR NOZZLES

Subject Categories:

• Rockets
• Fluid Mechanics
• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE