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3rd Thermal and Fluids Engineering Conference (TFEC)

ISSN: 2379-1748

NUMERICAL INVESTIGATION OF DUAL HIGH HEAT FLUX THERMAL MANAGEMENT FOR A PHASED ARRAY ANTENNA WITH MICROCHANNEL COOLING TECHNIQUES

M. Parlak
Aselsan Inc. REHIS Division, 06830- Ankara / Turkey, Electronics Cooling Technologies and Fluid Mechanics Laboratory; Gazi University - 06570

E. Örs
Aselsan Inc. REHIS Division, 06830- Ankara - Turkey

H. H Kılıç
Aselsan Inc. REHIS Division, 06830- Ankara - Turkey

DOI: 10.1615/TFEC2018.mnh.022343
pages 1641-1654


KEY WORDS: HotSpot Cooling, Microchannel, Liquid Cooling, Active Phased Array Antenna, Parallel Liquid Flow

Abstract

In the last two decades, as the solids state technology is rapidly developing providing with many electronic design advantages to build up phased array radar antennas, the thermal management problems becomes more challenging due to the space limitation, high flux cooling and working in mini scale. As the antenna systems reach to huge size, optimum thermal management becomes crucial to find a solution that can reduce the design cost in terms of power consumption, flow rate, pressure drop, weight as well as reliable designs serving long life. One of the important design parameters for Active Phased Array Antenna (APAA) which brings about many advantages in electronic performance and calibration is to keep the temperature of each HPA close to each other. This requirement makes the APAA more complex and it can be achieved with different design approach that should be studied by the thermal design engineers preferably at the beginning of the design. In this study, thermal management of dual HPA (GaN) micro module and one antenna array has been carried out by trying various fin design alternatives together with different manifold alternatives to reduce the flow rate and pressure drops to reasonable values as long as HPA channel temperature kept below allowable limit. In the design of the microwave module, remote cooling technique, where microchannel are machined in the cold plate, has been studied with straight fin designs and different coolants (PAO and EGW) and different flow rates to optimize the overall system design. Meanwhile, advantages of using parallel flow on the system is discussed. CFD analysis is performed with Fluent.18 ® software.

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