High-temperature ratio gas-thermal coupling turbine blade profile test flow field simulation device

The invention provides a high-temperature ratio gas-thermal coupling turbine blade profile test flow field simulation device, and relates to the technical field of aero-engines, and the device comprises a test cabin which is internally provided with a test section used for carrying out a turbine blade grid test; the mainstream system comprises a mainstream pipeline, a gas heating device and a mainstream flow control device are arranged on the mainstream pipeline, and the exhaust end of the mainstream pipeline is communicated with the test section; the secondary flow system comprises a normal-temperature gas pipeline, a low-temperature gas pipeline and a mixing device, and the exhaust ends of the normal-temperature gas pipeline and the low-temperature gas pipeline are both connected to the mixing device, so that the normal-temperature gas and the low-temperature gas are uniformly mixed to form secondary flow low-temperature gas meeting set pneumatic parameters; and after entering the test section, the gas and