Accession Number:

ADA101415

Title:

Investigation of Non Linear Aerodynamic Characteristics of Slender Bodies at High Incidence, in Subsonic and Transonic Speeds.

Descriptive Note:

Final technical rept.,

Corporate Author:

TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF AERONAUTICAL ENGINEERING

Personal Author(s):

Report Date:

1980-12-01

Pagination or Media Count:

81.0

Abstract:

This report presents the results of the experimental investigation of the effect of small, symmetric jet injection from the nose of a slender body on the lateral forces and moments at high incidence. The investigation includes the effects of Mach and Reynolds numbers rate of injection and the position of injection. It is demonstrated that at low speeds of jet blowing even small rates are a very useful means of side-force and yawing moment alleviation and even control, influencing both separation and structure of the vortex field. Such effects are also obtained at high subsonic and even transonic Mach numbers but required much higher injection rates. The results of some visualization tests are also included for better understanding and interpretation of the flow phenomena involved. The report includes also presentation of some preliminary results of a method for the calculation of the longitudinal aerodynamic characteristics of bodies at incidence including the separation of symmetric vortices, in subsonic flow. Preliminary results of the prediction method which consists of a combined sourcevortex lattice model, are presented. This method is being further developed for calculations of the aerodynamic characteristics of more complex wing-body configurations of high angles of attack. Author

Subject Categories:

  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE