Accession Number:

AD0684126

Title:

NEAR WAKE EFFECTS OF BASE INJECTION.

Descriptive Note:

Research rept.,

Corporate Author:

AVCO EVERETT RESEARCH LAB EVERETT MASS

Personal Author(s):

Report Date:

1969-02-01

Pagination or Media Count:

36.0

Abstract:

A simple model of the near wake with base injection is developed. Jet and wake mixing data are employed in a one-dimensional homogeneous jetwake model to obtain mean flowfield properties. Base injection is shown to cool or heat the wake depending on the magnitude of a general injection parameter. Efficient cooling is found to result from supersonic injection of a light gas, and the correlation of temperature data with injection velocity is suggested. The theoretical results are compared to wind tunnel base injection data and satisfactory agreement is obtained. Mach number, body shape and wake transition point effects on the cooling of hypersonic wakes are also discussed. Author

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE