Flow guide pipe for improving transonic low-frequency vibration of rear fuselage and aircraft with flow guide pipe

The invention belongs to the technical field of aircraft vibration design, and particularly relates to a flow guide pipe for improving transonic low-frequency vibration of a rear fuselage and an aircraft with the flow guide pipe. The flow guide pipe is a hollow circular pipe and is arranged on the lower surface of a rear fuselage of the airplane, the diameter of an inlet of the flow guide pipe is 0.1-0.2 m, the area of the inlet of the flow guide pipe is 1.1-1.5 times of the area of an outlet of the flow guide pipe, and the area of each section of the flow guide pipe from the inlet to the outlet is linearly changed. According to the airplane body boundary layer, air passes through the flow guide pipe and then is accelerated to flow out of the outlet of the flow guide pipe, nearby local flow is changed, shock waves and expansion waves are greatly weakened, and the amplitude of low-frequency vibration of the airplane body is reduced by about 35%. The vibration generated by the rear fuselage at the transonic spe