Numerical Simulation,Experimental Verification And Structure Improvement Of A Certain Type Of Appliance For Heating Non-combustion Smoke

As a new type of tobacco products,heat-not-burn smoking sets and their cigarettes have outstanding advantages in reducing the harmfulness of smoking,improving the taste of smoking and environmental protection.Therefore,it is necessary to establish an effective heat-not-burn appliance temperature-velocity coupling field simulation system.Based on this system,the effect of materials on the temperature distribution of the appliance can be predicted through simple material parameter modification,which provides a reference for the structural design of the appliance.In this paper,a digital three-dimensional model is established for a heat-not-burn smoking appliance and its supporting cigarettes,and an effective heat-not-burning appliance and its supporting cigarette temperature-velocity coupling field simulation system is established.Through the self-built experimental test platform,the simulation results of characteristic speed,static and suction heating were verified,and the original model was optimized.In this thesis,the following work is mainly done for a certain type of heat-not-burn appliance and its supporting cigarettes:(1)Perform simulation analysis on the internal velocity and pressure distribution of a certain heating and non-combustion appliance and its supporting cigarettes under different suction conditions,and simulate the flow of smoke inside the cigarette.(2)The steady-state temperature distribution of the heating body under different currents,the transient temperature distribution of static heating,and the transient distribution of dynamic suction heating are simulated and analyzed,and the effect of smoking on the temperature of characteristic points in the cigarette is discussed.(3)Through self-built experimental test platform,the experiment of speed field and temperature field is carried out one by one in the simulation corresponding working conditions,and the results obtained by the previous simulation are compared,and the conclusion that the simulation model used in this paper is accurate and reliable is obtained.(4)Based on the previous analysis of the velocity field of the original model,the bottom cover of three heating and non-combustion appliances was redesigned for the unreasonable points,and the velocity field was simulated again to obtain the velocity of the improved new model.Simulation results.The work of this thesis will establish an effective heat-not-burn smoking appliance and its supporting cigarette temperature-velocity coupling field simulation system,which provides a direction for further design and optimization of appliances,and can provide certain guidance for subsequent design optimization work.