Design And Performance Study On A New 3D Printed Compact Heat Exchanger Of Aeroengine

The thermal efficiency and economy of aeroengine are important indicators to evaluate their performance.In the development of aeroengine,thermal management technology can effectively improve the efficiency and economy of the engine,which has arisen technical engineers' attention in recent years.In the thermal management of aeroengine,the design and development of a compact and efficient heat exchanger is of great significance to improve the thermal management technology of aeroengine The 3D printing technology which has been developed rapidly can realize the manufacture of thin-walled,light-weight and complicated structural parts with high precision,make the structure design of the more complex and compact compact heat exchanger possible,and at the same time greatly shorten the development period of the new heat exchanger.3D printing technology can greatly enrich the design of heat exchanger,and help improve the heat exchanger performance and compactness,so as to meet the requirements of light and efficient heat exchangers in modern aviation applicationsThis research aims to design a novel and compact air-to-air heat exchanger for aeroengine which should be able to be manufactured through 3D printing.The heat exchanger is expected to perform as well as the original plate-fin heat exchanger under the volume and weight reduction of 20%.According to the requirements of dimensions and the restrictions of 3D printing technology,a compact heat exchanger with hot-side airfoil channel and inner fins arranged inside was designed innovatively.To achieve the performance of the original plate-fin heat exchanger,the concrete structure of the novel heat exchanger was designed by a thermodynamic Visual Basic program which is based on the method of ?-NTU.And then the 3D modeling of the heat exchanger was finishedTo verify the performance of the novel heat exchanger,the numerical simulation for it under real operation conditions was conducted.The results show that the difference of hot outlet temperature and heat transfer rate between numerical results and thermodynamic results is very small,and after analyzing the reasons of the gap,it can be inferred that the novel heat transfer has a great capacity of heat exchanger.However,the CFD results of pressure losses of hot air and cold air are not close with the thermodynamic results.For the pressure loss of hot air,the numerical results are much less than thermodynamic data and can meet the performance requirements well.On the contrary,for the pressure loss of cold air,the numerical results are larger than thermodynamic results.Several contours of temperature,pressure and streamlines are analyzed to find out the characteristics of flow and heat transfer and the influence of fins on the flow field.