Rotatable linear flow measuring device and measuring method

The invention belongs to the technical field of experimental aerodynamics, and discloses a rotatable linear flow measuring device and a '1+1' measuring method. The rotatable linear flow measuring device comprises a linear pressure bent frame, a support and an adjusting frame; the support is fixedly connected to a model tail support; the adjusting frame is detachably connected to the upper portion of the support; guide grooves are formed in the two ends of the adjusting frame; the linear pressure bent frame is located at an outlet of a rectangular air inflow channel and comprises symmetrical wedges; two connecting rods are arranged at the ends, away from the outlet of the rectangular air inflow channel, of the symmetrical wedges; sliding heads are arranged at the free ends of the connecting rods; the sliding heads are in sliding connection with the guide grooves and fixed through screws; and three small round holes are formed in the left sides of the symmetrical wedges at equal intervals; the small round holes