Research On Topological Structure Of Microchannel Cold Plate For Active Phased Array Antenna

With the rapid development of our national defense strength,the"eye"radar has been vigorously developed,and the corresponding integration of T/R components has also been continuously improved.For the phased array radar antenna with superior performance,its increasingly prominent thermal control problem has drawn wide attention from domestic and foreign scholars.In this paper,for the phased array antenna,the research on the topologies of micro-channel cold plate are carried out from the aspects of chip level cold plate,single-phase cooling front level cold plate,multi-phase cooling front level cold plate to solve the antenna thermal control problem.The specific research contents are as follows:(1)Research on the topologies of the chip level micro-channel cold plate.Several topological network structures are designed according to the heat and mass transfer characteristics of micro-channels.The numerical simulation is also used to analyze the thermal and pressure drop characteristics of each structure.After that,optimization of parameters of the cobweb structure with the best overall cooling performance is studied.Then the design standards of the topologies of chip level micro-channel cold plate are summarized.Finally,verify the above conclusions through experiments with the samples processed by metal 3D printing.(2)Research on the topologies of the single-phase cooling front level micro-channel cold plate.Taking an airborne radar antenna as a carrier,four heat-dissipating micro-channel topologies with different characteristics are designed according to the heat transfer characteristics of the single-phase heat sink and the arrangement of heat sources on the fronts.After that,the thermal simulation results are compared with each other to obtain a topological network structure with the best overall heat dissipation performance.Then the design standards of the topologies of single-phase cooling front level cold plate are summarized.On the basis of this,a highly efficient design method of the topologies of micro-channel cold plate is designed.(3)Research on the topologies of the multi-phase cooling front level micro-channel cold plate.Based on the flow and heat transfer characteristics of multi-phase heat exchange in a straight microchannel,an equivalent thermal simulation method based on the Icepak thermal simulation software is studied,and three micro-channel topologies are designed.Using the above equivalent thermal simulation method,the single-phase and multi-phase topologies are numerically calculated and analyzed to obtain the micro-channel topological structure with the best overall heat dissipation performance.Then the design standards of the topologies of multi-phase cooling front level cold plate are summarized.The validity and reliability of the thermal simulation results are verified by experiments at last.This paper systematically studies the structure of phased array antenna microchannel cold plate.It not only summarizes the topological structure design methods of chip-level cold plate,single-phase cooling front level cold plate,and multi-phase cooling front level cold plate,but also satisfies the high heat-dissipation index of the antenna array with an average temperature of 3°C,a heat dissipation capacity of 100W/cm~2,and a pressure drop of 0.3MPa.It can be regarded as the reference for the design of microchannel topology of phased array cold plate.