Temperature Control Co-simulation Method In Aircraft Cabin

Aircraft cabin is one of the key components of civil aircraft,which bears an important role in ensuring the health,comfort and safety of passengers.One of the important factors affecting the comfort of the cabin personnel is the temperature environment of the cabin.At the same time,passengers have Increasing demand for the uniformity of air diffusion performance and thermal comfort in the cabin,and the cabin temperature environment is controlled by the aircraft cabin temperature control system.In the numerical simulation study of the cabin temperature environment by Fluent software,generally,the boundary conditions are assumed to be constant,so it is often only concerned with the distribution of temperature and flow fields,ignoring that the boundary conditions are regulated by the temperature control system.Single Fluent software is difficult to realize the control and adjustment of the cabin temperature by the temperature control system.And although AMESim software can realize the control and adjustment of the cabin temperature by the temperature control system,while the AMESim assumes uniform air distribution within the cabin,and the whole cabin as an air node,unable to analyze the position of air parameters in the three-dimensional space of the cabin.Based on this,put forward the method of AMESim—Fluent co-simulation,simulation of the control of the boundary conditions of the cabin environment by AMESim software,and the numerical simulation of the three-dimensional space of the cabin by Fluent software,which combines the advantages of the two software,realize the dynamic combination between the temperature control system and the cabin.Firstly,this articler studies co-simulation method of AMESim—Fluent based on the ground simulation cabin experiment platform,experiment and simulation combined.The flow field and temperature field of the ground simulated cabin experiment platform were studied by particle image velocimetry(PIV)and temperature experiment,the ground simulated cabin temperature control system and cabin model were established,C language and Fluent User Defined Functions(UDF)were used to develop co-simulation interface,to implement data interaction between the two software,numerical simulation of corresponding experimental conditions is also carried out.The simulation results are compared with the experimental data to verify the correctness and rationality of the co-simulation model and method.The relationship between aircraft temperature control system and cabin temperature environment is studied by using the co-simulation method.To achieve the temperature control system,the sensor is placed in the cabin and the air supply mode is switched to study the cabin temperature environment.Co-simulation shows that multi-temperature sensors and switch air supply mode based on multi-temperature sensor can improve cabin air distribution uniformity and passenger thermal comfort.Furthermore,the co-simulation method is used to study the aircraft cabin to tightly couple the one-dimensional control system with the three-dimensional cabin,and study the advantages of the interaction between the control system and key areas in the cabin.