Accession Number : AD0700252

Title :   UNSTEADY AERODYNAMIC LOADS ON ACCELERATED BODIES: REVIEW AND EXTENSION.

Descriptive Note : Final technical rept.,

Corporate Author : STANFORD UNIV CALIF DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s) : Ashley,Holt ; Kacprzynski,J. J. ; Vitte,William

Report Date : JUN 1969

Pagination or Media Count : 67

Abstract : The problem under examination is the prediction of aerodynamic loads due to the influence of high longitudinal accelerations, over the entire range of flight speeds, for elongated slender bodies such as interceptor missiles. A survey is presented on existing theoretical methods, which generally cover apparent mass in incompressible flow, small-perturbation techniques for transonic and lower supersonic speeds, and 'snowplow' theory for the hypersonic range. Citations are made to the important literature on each, along with a critique of their applicability and a few numerical examples. By way of attempting to remedy a current deficiency at intermediate supersonic Mach numbers, a new theoretical method is developed and applied to accelerated wedges with attached shock. One consequence of this work is that acceleration effects appear to be higher than anticipated in certain ranges. Suggestions are made for the extension of this method to other two- and three-dimensional shapes. The report closes with conclusions and recommendations regarding much-needed future research. (Author)

Descriptors :   (*ANTIMISSILE DEFENSE SYSTEMS, GUIDED MISSILES), (*GUIDED MISSILES, AERODYNAMIC LOADING), ACCELERATION, STABILITY, MATHEMATICAL PREDICTION, SLENDER BODIES, INCOMPRESSIBLE FLOW, AERODYNAMIC CHARACTERISTICS, WEDGES, SHOCK WAVES, REVIEWS

Subject Categories : Antimissile Defense Systems
      Guided Missiles
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE