Abstract
An experimental investigation of jet interaction on con gurations with lifting surfaces is presented. The experiments were carried out at supersonic Mach numbers of 2, 3.3, and 4.5 and at the hypersonic Mach number of 8. The test model was an ogive-cylinder body with interchangeable lifting surfaces that can be mounted at various locationsalong the body.Several body–surface combinationswere tested representing wing, tail, wing plus tail, and strake con gurations. In some cases, the presence of the surfaces resulted in large force and/or moment ampli cation due to the interaction of the jet-induced ow eld with the planar surfaces. Large ampli cation factors were obtained at zero angle of attack for some con gurations even at the lowMach number of 2. In contrast, for similar tests using body of revolutionwithout additional surfaces, only small force ampli cation, at best, could be obtained at small angles of attack. The force ampli cationwas also shown to vary inversely with jet pressure. For low values of the jet stagnation pressure, ampli cation factors in excess of 2 were obtained. The interaction moments could be used to obtain an additional, aerodynamic, lifting force, which for some con gurations can further increase the control force.
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