Jet-engine-gas-based apparatus and method for thermal shock and thermal fatigue testing

The invention discloses a jet-engine-gas-based apparatus and method for thermal shock and thermal fatigue testing. When a micro turbine engine works, fuel gas from a jet nozzle is used as a gas source; after convergence of the gas with cooling gas in a mixing device with a bypass, tail gas with the adjustable temperature is generated and is used as high-temperature bleed air for testing; a bleed air jet position for thermal shock is adjusted by an adjustable support frame; and a periodic thermal shock work condition of a test piece is simulated by rotation of the test piece on a rotary test stand. A bleed air temperature control system formed by a thermocouple, a cooling gas bypass, an electrically controlled butterfly valve, and a controller and the like is used for controlling the temperature of bleed air to be in a preset test range. Using the apparatus provided by the invention, the technical support can be provided for thermal shock and thermal fatigue testing and analysis of the thermal end component of