METHOD FOR DETERMINING AERODYNAMIC HEATING OF HIGH-SPEED AIRCRAFT DURING ADVANCE FLIGHT TRIALS ON LAGRE-SCALE MODELS

摘要

FIELD: aviation.;SUBSTANCE: method for determining of aerodynamic natures heating in advance flight trials on a model comprises determining altitude and airspeed of the model, thermal conductivity, volume specific heat and material emissivity of its thermal protection, as well as aerodynamic heat flow on the outer nature surface at model similar points under conditions of similarity in these points of the temperature distributions in materials and the thermal protection of the model and the nature. The temperature and the conductive heat flow on the outer surface of the model are determined from the integral equations according to the measured temperatures in the thermal protection material via thermocouples. Sequentially determining model altitude, static temperature, and air flow pressure at the model altitude, thermal conductivity of the thermal protection material of the model, volume specific heat of the material of the thermal protection of the model and the emissivity of the model thermal protection material. Thermocouple are set in the material of the thermal protection and conduct advance flight trials are carried out for the model. After traials the temperature on an outer surface of the model, conductive heat flow and aerodynamic heat flow are sequentially determined.;EFFECT: improved accuracy of determining the nature aerodynamic heating.;5 dwg