METHOD OF DETERMINING THE AERODYNAMIC CHARACTERISTICS OF A FLYING VEHICLE FROM THE SURFACE PRESSURE

The paper presents a description of the procedure used for determining the aerodynamic characteristics (forces and moments acting on a model of a fl ying vehicle) obtained from the results of pressure measurements on the surface of a model of a re-entry vehicle with operating retrofi re brake rockets in the regime of hovering over a landing surface is given. The algorithm for constructing the interpolation polynomial over interpolation nodes in the radial and azimuthal directions using the assumption on the symmetry of pressure distribution over the surface is presented. The aerodynamic forces and moments at different tilts of the vehicle are obtained. It is shown that the aerodynamic force components acting on the vehicle in the regime of landing and caused by the action of the vertical velocity deceleration nozzle jets are negligibly small in comparison with the engine thrust
   
Author:  V. F. Volkov, A. A. Dyad′kin, V. I. Zapryagaev, and N. P. Kiselev
Keywords:  aerodynamic forces, aerodynamic coeffi cients, re-entry vehicle, landing surface
Page:  1445