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Journal of Thermal Science

, Volume 28, Issue 2, pp 252–261 | Cite as

Thermal-Hydraulic-Structural Analysis and Design Optimization for Micron-Sized Printed Circuit Heat Exchanger

  • Yaqiong Hou
  • Guihua TangEmail author
Article
  • 51 Downloads

Abstract

The Printed Circuit Heat Exchanger (PCHE) is one of the most promising heat exchangers for Synergetic Air-breathing and Rocket Engine (SABRE). To reduce pressure drop and improve compactness, the micron-sized PCHE made up of rectangular channels of tens of microns in size, is used in SABRE. In present work, we focus on thermal-hydraulic-structural characteristics of micron-sized PCHE by conducting three-dimensional (3-D) numerical simulation. Helium and hydrogen are employed as the working fluids and the Stainless Steel 316 (SS316) as the solid substrate. The thermal-hydraulic performance of the micron-sized PCHE is discussed by using the commercial Computational Fluid Dynamics (CFD) software of Fluent. ANSYS-Mechanical is also employed to simulate stress field of representative PCHE channels. The mechanical stress induced by pressure loading and the thermal stress induced by temperature gradient are found to be equally important sources of stress. To improve comprehensive performances of micron-sized PCHE, two types of channel arrangements and different channel aspect ratios are studied. The double banking is of higher thermal-hydraulic performance compared to the single banking while the stress performance is identical for the two modes. Meanwhile, the effect of channel aspect ratio is investigated by comparing thermal-hydraulic characteristics and structural stress of the model. The rectangular channel with w/h=2 achieves the most balanced stress characteristic and higher thermal-hydraulic performance.

Keywords

computational fluid dynamics (CFD) Printed Circuit Heat Exchanger thermal-hydraulic-structural performance channel arrangement channel aspect ratio 

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Notes

Acknowledgements

This work was supported by the National Key Research and Development Program of China under grant number 2017YFB0601803, the National Natural Science Foundation of China under grant number 51576156 and the 111 Project under grant number B16038.

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Copyright information

© Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’anChina

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