Solid smoke agent and liquid smoke agent.
The principle of solid smoke is to spray the smoke produced by the combustion of solid smoke agent (smoke bomb) into the air. The solid smoke exhaust device described in patent ZL20 15 10343482.5 of Chengdu Aircraft Industry Group Co., Ltd. is to solve the problem of the influence of aircraft flight speed on smoke concentration.
Attached figure ZL20 15 10343482.5.
As shown in the above figure, the fairing 1 rectifies the air entering the smoker, and the front cone 5 decelerates the airflow. The airflow is guided by the gas collecting hood 7 and enters the central flow passage 13 of the smoke bomb 8, forming an airflow with stable flow rate. The smoke generated by the combustion of the smoke bomb 8 is ejected from the horn nozzle 14 under the drive of the airflow. This structure solves the problem of continuous and stable tobacco belt!
As can be seen from the above description, solid smoke is usually produced by combustion. In today's increasingly demanding environmental protection, solid smoking is obviously not applicable.
Nowadays, more liquid smoke suppressants are used.
The principle of liquid fuming is to inject liquid fuming agent with high boiling point into high pressure container. When smoke is needed, the liquid smoke agent is sent to the air outlet of the engine through the nozzle and mixed with high-temperature gas at the air outlet of the engine to form a smoke mixture. The mixture will atomize when it is cold in the air, which also forms the "smoke" pulled out by the plane.
Inject liquid smoke agent into a high-pressure container,