CALIBRATION AERODYNAMIC MODEL FOR DETERMINING SYSTEMATIC ERRORS AND METHOD OF DETERMINING SYSTEMATIC ERRORS

摘要

FIELD: physics.;SUBSTANCE: model is installed on weighers of a supersonic wind tunnel, and is equipped with a system of supplying the working medium in form of a jet stream. The model is in form of a central casing and two gondolas, installed symmetrically on pylons at a certain distance from it and displaced relative the casing along the longitudinal axis at a position, excluding interference effects of streams on the casing, flowing from the nozzle of the gondola. Supply of jet streams of the working medium to the gondolas is done through the central casing. Power characteristics of the model are measured using a weight method, successively with supply of jet streams of the working medium to the gondolas, i.e. with and without thrust. The model is installed on weighers in a supersonic wind tunnel, jet streams of the working medium are let in and the power characteristics are measured while an external stream blows the model. The difference between these weight measurements is determined, and then this difference is compared with the value of thrust, determined from the results of pneumometric measurements.;EFFECT: increased accuracy and authenticity of aerodynamic tests.;2 cl, 1 dwg