GAS TURBINE ENGINE COMBUSTION CHAMBER TESTING UNIT Russian patent published in 2024 - IPC G01M15/14 F23R3/00 G01M15/02 

FIELD: testing; engines.

SUBSTANCE: gas turbine engine combustion chamber testing unit comprises compressed air source, air feed line with control valves and devices for measuring flow parameters, with combustion chamber arranged at its outlet. Wherein compressor driven by motor is used as compressed air source in the air feed line. Air feed line with control valves includes shutoff valves and has air heating line, in which there is a combustion device, a heat exchanger and instruments for measuring flow parameters, as well as an air cooling line, which is supplied by a turboexpander, which includes a cylinder frame and a turbine, which is driven by an electric motor. Air feed line comprises a measuring section, in which there are instruments for measuring flow parameters (temperature, pressure, flow rate). Levelling grid is arranged in front of combustion chamber. At the inlet of the combustion chamber, a blade simulator of the guide vanes is connected, at the outlet, a blade simulator of the nozzle apparatus is connected, behind the combustion chamber there is a cooled spacer, in which there is a thermocouple comb, a pneumatic comb, a gas sampling probe connected to the gas analysing equipment, and an adjustable shutter. Fuel supply line to the combustion chamber and the fuel supply line to the furnace device include cylinders with gaseous fuel, tanks with liquid fuel, fuel filters, fuel pumps and devices for measuring parameters. Combustion products drainage systems are installed at the outlet of the heat exchanger and the cooled spacer.

EFFECT: providing negative air temperatures at the inlet to the combustion chamber, enabling the tests at high air pressures, close to the engine conditions, checking the effect of the compressor guide vanes and the turbine nozzle on the combustion chamber parameters, providing the air heating at the combustion chamber inlet, provision of air temperature control at the combustion chamber inlet, provision of operation on liquid and gaseous fuels, provision of measurement of emissions of harmful pollutants in combustion products, providing equalization of the field of velocities and pressures at the inlet of the combustion chamber, provision of the possibility to determine losses of pressure and temperature field at the outlet of the combustion chamber.

1 cl, 1 dwg