Experimental study of the drag of the forebody and the cylindrical part of the HB-1 model with an upstream injection of a fluid in a supersonic flow

Values of the gas-dynamic drag of the forebody and the cylindrical part of the HB-1 test model in a supersonic flow have been separately measured using an internal strain-gauge balance. It is shown that an upstream injection of a fluid jet from the model forebody decreases the drag of both the forebody and the cylindrical part.