METHOD OF DESCENT IN ATMOSPHERE OF MEMBER SEPARATED FROM HYPERSONIC VEHICLE POSSESSING AERODYNAMIC EFFICIENCY AND DEVICE FOR ITS REALIZATION Russian patent published in 1997 - IPC

FIELD: aerodynamics, in particular, descent in atmosphere of members separated from hypersonic vehicle. SUBSTANCE: the method consists in stabilization of the separated member at a preset angle of attack in the plane of symmetry under the action of the aerodynamic current; stabilization of the separated member is effected by action of stabilizing moment on it equal in value and reverse in sign to the aerodynamic moment acting on the separated member at an angle of attack corresponding to zero aerodynamic lift and minimum of aerodynamic drag at hypersonic flight speeds. The device has a stabilizing unit of heat-resistant material connecting it to the separated member. The stabilizing unit is made in form of a ballistic- type rigid body statically stable in aerodynamic current; the flexible coupling is hinge-joined to the top of the stabilizing unit, whose maximum cross-section area is determined from relationship :S_m= C_xa•S/C_xal•μ•(((1+μ)/μ)•m₂/C_xa/K_x,y+1), where K_x,y= (Y_o-Y_t)•cosα-(X_o-X_t)•sinα, S_m - maximum cross-section area of the stabilizing unit referred to S_m; α - angle of attack of separated member corresponding to zero lift and minimum drag at hypersonic flight speeds; S,L - characteristic area and length of separated member; m_z - pitching-moment coefficient of separated member at angle of attack α referred to S and L; C_xa - drag coefficient of separated member referred to S; μ - stabilizing unit mass-to-separated member mass ratio; X_o,Y_o - coordinated of flexible coupling attachment to separated member referred to L; X_t,Y_t - coordinates of center of masses of separated member referred to L. EFFECT: facilitated procedure. 2 cl