Study On Indoor Chemical Attack Countermeasures And Optimization In Military Camp Buildings

A strong military provides strength support and fundamental guarantee for safeguarding national security.When the military barracks suffered chemical attacks,once the gas spread in indoor places is very difficult to control,will bring serious harm and consequences.The damage to people depends not only on its biochemical properties but also on the concentration of the gas in the area of the body.In order to protect indoor personnel from minimal harm caused by poison gas,it is necessary to effectively control the diffusion range of the gas and reduce the gas concentration.Aiming at the gas attack mode which may appear in military barracks,this thesis studies the control ability of different air distribution forms to gas diffusion.Based on previous research into the potential of immune buildings to resist the spread of microbial aerosols,the authors of this thesis propose a novel ventilation model suitable for military buildings that can combat indoor chemical attacks.A comparison is made between its effectiveness and that of two other common ventilation modes-hybrid ventilation and displacement ventilation-in protecting against toxic gases.Finally,multi-objective optimization of the dormitory air supply parameters is carried out by means of multiple linear regression to derive the optimal air supply size and air supply speed for the dormitory’s toxic gas protection flow field.In order to accurately predict indoor hazardous chemical dispersion under ventilation conditions,a computational fluid dynamics model based on multi-group shunt is summarized.To ensure the reliability of the mathematical model,the authors designed and built a comprehensive experimental chamber for immune buildings.In order to ensure the reliability of the mathematical model,the authors designed and built a comprehensive experimental chamber for immune buildings.It was demonstrated that the numerical calculations of the established k-ω based model showed good computational accuracy under various ventilation conditions.Based on the plausible numerical model,the thesis applies it to the prediction of the concentration of chemical substance diffusion in military barracks buildings.Analysis of the common chemical attack mode,summarize the possible gas attack mode in the barracks;Considering the personnel density,defense force,importance of different military buildings and other parameters,comprehensive evaluation of the overall risk of chemical attack on buildings.The focus is on two types of buildings with a high risk of chemical attack.Numerical calculations are used to simulate the dispersion of different forms of indoor airflow in the event of a chemical attack.The results of the numerical calculations show that the "air rain" flow field is more resistant to chemical attack than hybrid ventilation and displacement ventilation.To further validate the dynamic gas control effect of the "air rain" flow field,the "air rain" flow field is also shown to provide excellent gas protection in the case of human movement in a dormitory.In order to verify the gas protection effect of other types of barracks buildings,the "air rain" flow field is used as an example to verify the gas protection effect of the barracks canteen.Considering that there are some deficiencies in the practical engineering application of "air rain" flow field,it is necessary to optimize the "air rain" flow field.The multi-objective optimization of the "air rain" flow field is based on the example of a dormitory,where the average concentration and average velocity of the indoor human breathing zone are predicted by means of multiple linear regression.By limiting the concentration range in the breathing zone,the size and speed of the air supply opening is found to be the minimum.Finally,the reliability and accuracy of the optimization results are verified experimentally.