METHOD FOR DETERMINING COMBUSTION RATE OF SOLID FUEL IN GAS STREAM Russian patent published in 2021 - IPC F02K9/96 G01M15/14 

FIELD: aviation and rocket engine construction.

SUBSTANCE: invention relates to the field of aviation and rocket engine construction, it can be used in the study of working processes in ramjet air burning and hybrid rocket engines in the conditions of bench tests. The method consists in measuring the thickness of the burned arch of a cylindrical channel charge of solid fuel placed in a combustion chamber with a nozzle block, when the heated gas is supplied with the specified values of temperature and density of the oxidizer flow. The gas supplied to the solid fuel charge channel is heated by mixing air with the combustion products of the solid fuel gas generator. The ignition of solid fuel in the charge channel is carried out by the combustion products of an annular insert of flammable solid fuel installed on the side of the head of the solid fuel charge. Measurement of the thickness of the burnt arch along the length of the charge during combustion is carried out by axial reciprocating movement of the annular microwave resonator sensor. The rate of solid fuel combustion, the speed of the sensor movement, the air flow, the consumption of the combustion products of the gas generator and the thickness of the annular insert are calculated by algebraic formulas in accordance with the conditions of measurement.

EFFECT: invention is aimed at determining the combustion rate of solid fuel in a heated gas stream along the length of the charge at different times, expanding the temperature range of the blowing gas, and reliable ignition of samples with a high ignition temperature.

1 cl, 2 tbl, 2 dwg