Fin enhanced heat exchange infrared suppressor and infrared suppression method

摘要: The invention discloses a fin enhanced heat exchange infrared suppressor which is suitable for an exhaust system of turboshaft engine. comprises anair collection chamber, cold air inlet, firewall, plurality shunting spray pipes, mixing insulation covers, fins and the like. On one hand, momentum high-temperature gas behind turbine utilized to pump in then mix with reduce mainstream temperature core area; on other downwash airflow lifting rotor enters interlayers between pipes outer sides at surfaces components covers carried away through exchange, so that radiation transfer skin reduced, meanwhile, area reduced certain extent. In addition, double-layer wall surface structure has good shielding thermal effects, anda sand-proof residual introduced into structure, machine body basically consistent outside further reduced.