Random vibration protection of a double-chamber submerged jet impingement cooling system: A continuous model

Abstract

High-powered embedded computing equipment using air transport rack (ATR) form-factors is playing an ever-increasing role in aerospace applications. High power and wattage of the electronics and processors require large heat dissipation. Thus more sophisticated, more efficient, and sometimes exotic thermal cooling systems like loop heat pipes or jet impingement systems are demanded. Despite their better thermal performance, these systems are usually more susceptible to mechanically harsh environment where they are deployed. Random vibration is one of the primary excitation sources in aerospace environments where highly efficient cooling systems are used. In this article, a multiple degree of freedom model of an isolated double-chamber jet impingement cooling system is developed, and its response to random vibration is analyzed and compared to that of a traditional single degree of freedom model. Vibration isolation system properties are optimized to minimize the vibration of the internal components of the cooling system, while the whole system enclosure is confined within an allowed rattle space.