METHOD FOR DETERMINING TEMPERATURE FIELD OF AIRCRAFT ELEMENTS DURING AERODYNAMIC HEATING Russian patent published in 2020 - IPC G01M9/00 G01K13/00 G01N25/18 

FIELD: test technology; aircraft engineering.

SUBSTANCE: invention relates to methods and means for ground testing of aircraft elements (AC), specifically to methods of reproducing aerodynamic thermal action on surface of AC elements, for example, fairings of homing heads of aircraft rockets, antenna fairings, compartments with a missile in ground conditions. Temperature field of AC elements at aerodynamic heating according to proposed method is determined as a result of thermal experiment at test bench, including several cycles of aircraft elements heating heated air flow. Before the heat experiment, the temperature of the air flow recovery in flight and the heat release coefficients at the test bench and in flight are calculated so that the heat-transfer coefficient at the test bench is less than the heat-transfer coefficient in flight. First heating cycle is carried out at the heat release coefficient equal to the heat release coefficient at the bench, and the heated air flow recovery temperature equal to the air flow recovery temperature during flight, and subsequent heating cycles are carried out at constant heat release coefficient and calculated temperature of heated air flow recovery. At that time of each heating cycle of AC element is equal to preset flight time, wherein thermal experiment is completed when the measured surface temperature of the AC element on the current heating cycle of the AC element will be different from the measured surface temperature of the AC element at previous cycle of element AC heating by not more than by permissible error of measurement system or temperature will be equal to each other.

EFFECT: higher accuracy and reliability of determining temperature field of aircraft elements during aerodynamic heating while reducing labor intensity of experiment.

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