The utility model belongs to the technical field of high-temperature pressure testing, and discloses a dynamic static pressure measuring device for high-temperature
airflow, which is suitable for dynamic static
pressure measurement of
turbine inlets,
turbine outlets and interstage wall surfaces. Comprising a cylindrical supporting rod, a
pressure sensing hole, a
dynamic pressure sensor, a pressure measuring channel, a water
inlet channel, a water outlet channel, a partition plate, a cavity, a multifunctional positioning block, a fixing thread and a cable. The axis of the
pressure sensing hole coincides with the axis of the supporting rod and communicates with the
dynamic pressure sensor through the pressure measuring channel. The supporting rod is of a double-layer coaxial structure, the inner layer and the outer layer are divided by a vertically-arranged partition plate to form a water
inlet channel and a water drainage channel, the sections of a water inlet and a water outlet are smoothly transited from a
cashew nut shape to a round shape, and the flow area is constant. The lower end of the supporting rod is provided with a fixing thread and is matched with a multifunctional positioning block for positioning and fixing with the wall surface of the casing, thereby realizing dynamic static
pressure measurement of the wall surface in a 2000K environment.