Improved Design And Cabin Application Analysis Of Marine Air Fabricator

In today’s marine system,there are requirements about comfort that are getting more and more attention and concern.The marine system provides people with temperature comfort and at the same time produces a lot of noise,which seriously affects the comfort and health of the crew.As the end equipment of marine air-conditioning,the air distributor can adjust the air supply by changing the air flow state,thus producing the effect of infusion and heat dissipation;in addition,it can effectively improve the airflow organisation of the ship’s habitation cabins and enhance the thermal comfort of the passengers.Ship air-conditioning systems face a number of challenges,the most prominent of which include:firstly,the flow path structure of the cloth ventilator is usually not very well constructed,which can result in excessive resistance in the inner wall of the unit,reducing the ventilation efficiency,and can affect the ventilation effect.Secondly,the heat dissipation efficiency of the fabric air blower is not very good,and it will affect the sleep quality of the passengers.For this reason,this paper adopts Fluent,Airpak and other simulation software,combined with CFD numerical simulation analysis,to carry out an in-depth analysis and discussion on the resistance,aerodynamic noise,and comfort and other characteristics of the cloth ventilator.The main research contents are as follows:(1)Optimisation and improvement of the air blower model.In this thesis,we study the optimisation of a box-type air blower,pursuing the optimal design of low energy consumption,more reasonable flow structure and more comfort in the cabin.By combining CFD techniques with finite element analysis,we investigate in depth the mechanisms by which the flow path structure and other external factors affect the flow behaviour of the blower.The rectangular cube shape of the blower is rounded to reduce the flow resistance,pressure and turbulent energy inside the blower.In order to reduce the aerodynamic noise generated during the air supply process,a micro-perforated baffle is added to the internal area of the blower where the turbulence energy is relatively large,and a comparison of the flow field effects of a total of four different blower optimisation models is explored.(2)Air supply in the cabin(2)Simulation of air supply and comfort effect in the cabin.In order to better simulate the airflow distribution in the ship’s cabin,we have built a simple model of a living cabin.We installed a miniature baffle inside the air distributor and at the air outlet.We used Airpak software to simulate this situation.By comparing the temperature,flow rate,humidity and airflow distribution performance,we can conclude that this approach may lead to some optimisation.The changes in the uniformity of the temperature,velocity and humidity field distribution and the thermal comfort in the cabin with the optimised and improved air supply from the baffle are investigated.In this thesis,through numerical simulations with a variety of simulation software,we can obtain accurate values of the drag coefficient and aerodynamic noise.These data can provide strong support for the optimised design of the marine air blower,which can greatly improve the operational efficiency of the air blower and improve the comfort of the cabin.