Symmetrical and asymmetrical exhausting system capable of improving afterbody flow field, and method thereof

The invention discloses a symmetrical and asymmetrical exhausting system capable of improving an afterbody flow field, and a method thereof. The exhausting system comprises a spray pipe afterbody, wherein a blocking sheet is arranged on the outside wall surface of the spray pipe afterbody; one end of the blocking sheet is connected with the outside wall surface of the spray pipe afterbody through a moving pair or a rotating pair and the other end of the blocking sheet is movably arranged; and the blocking sheet moves on the outside wall surface of the spray pipe afterbody, and can change the flowing direction of gas flow which flows out of a flow channel in a spray pipe and delay convergence of gas flow which flows through the outside wall surface of the spray pipe and the gas flow which flows out of the flow channel in the spray pipe. Therefore, the exhausting system improves the pressure distribution of the spray pipe afterbody area so as to reduce the afterbody resistance of an airplane. 本发明公开了种能够改善后体流场的对称