Numerical Simulation Of Airflow Organization In Ship Ward

The form and distribution of inhalable particulate contaminant movement distribution characteristics of airflow on the ship in the ward is of great significance to improve the ship unit thermal comfort,improve air quality,protect the health of the ship wounded ward and control of infectious diseases.For a long time lying in wards of the wounded,speaking from the human body and breathing,cough and other acts will send aerosol particles from the nose and mouth,these particles may carry germs and bacteria,good air distribution can be discharged as soon as possible,to reduce the risk of human body.This paper uses the CFD methods of numerical simulation,4 different sub transmission way for numerical simulation,airflow distribution prediction in the ward form and the particle concentration distribution,in order to improve the indoor thermal comfort and effective control of pollutant concentration reference.Specific work is as follows:Firstly,the concentration of indoor particulate pollutants at different time points was measured at different points in the test room by experimental method.Through the statistical analysis of the experimental data,we can get the actual distribution of indoor particle pollutants.The numerical simulation of the experimental conditions by using Fluent software,the experimental data and numerical simulation results are compared for different gas-solid two-phase flow model to analyze and verify the reliability of the numerical simulation,the calculation results show that the simulation of particle distribution,stochastic trajectory model in DPM model simulation results closer to the experimental value.On this basis,taking a typical ship unit as an example,in the air under certain conditions,respectively on the square diffuser to supply air and square diffuser to supply air and local wind,full orifice orifice plate air supply 4 different airflow organization form under the indoor temperature field,velocity field and PMV distribution the distribution of particulate pollutants,simulated and analyzed,the air cabin air distribution of four kinds of wind distributor from the comfort and air quality when the angle made comprehensive evaluation.The preliminary proposal of air supply scheme in ship ward is given.Finally,a comparative analysis for four different forms of local orifice wind,given the local ward ship orifice design proposal of the wind.