Refrigerated Container Interior Flow Field And Temperature Field Numerical Calculation And Experimental Study

With the development of the edibles industry and the need of the food refrigeration transport, recently, all kinds of refrigerated containers are growing more and more popular in different means of refrigeration transport, including the highway transport, the railway transport and the water transport. Considering the need of practical application for refrigeration and transportation in China, according to traditional engineering experience, the container is often treated with concentrative cabinet model, that is to say, the air temperature is same everywhere in the room. At present, so-called controlling the container's temperature is only controlling the temperature of measuring points in fact. For example, as for the food refrigeration transport, there often comes forth the phenomenon of half refrigerated and half rotted. How to really know about the temperature distribution of the whole area in the refrigerated container is very necessary. This thesis, combined with the practical use of China's refrigeration transport, is to study the law of distribution of the airflow and temperature field inside the refrigerated container which is working in a stable condition.Whether the airflow is good or not influences the container's refrigerating effect directly. The digital simulation has been becoming the effective method in the study of airflow. In this thesis, the writer has used the three-dimension turbulent K- e model to analyze it. In accordance with the established correspondent physical mold and the mathematical mold, the writer, making use of the correspondent computer program, has drawn the conclusion about the condition in the refrigerated container. The writer has made experiments to test and verify this conclusion. The writer first worked out the experiment plan, then designed the sampling equipment, and at last made the experimental measures. The main job of the experiment is to measure the temperature at different spots in one refrigerated container. In the theoretical calculation and the experimental study, the working condition is changed by means of changing the delivering temperature.No matter what the theoretical calculation and experiment, there are some slight deficiencies. When calculating theoretically, the model is standard k-e turbulent flow model, its application in the situation of high Re is very mature. What is more, in the experiment research, I can't make the experiment research of changing the air delivering velocity. In addition, I didn't test the flow field. These are the slight deficiencies, and I hope that there will be a chance for me to make a further research later.There are some slight differences between the experiment result and the theoretical calculation, but these differences are reasonable in the engineering pragmatic technology, therefore the said theoretical study in this thesis is, tosome extent, useful and effective.