In order to analyze the effect of natural ventilation on bulk grain in the cargo hold,a ventilation model of a bulk grain cargo hold of a ship is established,and the model is improved according to the characteristics of the grain itself.The temperature and humidity in the cargo hold are measured by the temperature tube,and the measured data are compared with the data simulated by the computational fluid dynamics(CFD)software.The results show that the simulated data are in good agreement with the measured data.According to the obtained simulated and measured data,it is concluded that the cargo hold ventilation has a certain effect on the temperature control of surface grain,but the heat dissipation effect on deep-layer grain is limited.Ventilation can reduce the high humidity phenomenon of surface grain,while it has no obvious effect on the humidity reduction of deep-layer grain.The research results have certain reference significance for the safe transportation of ship-borne bulk grain.
bulk grain cargo holdnumerical simulationventilationheat and moisture transfer
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