Onboard Electronic Equipment Ventilation System Design and Cooling Capacity Analysis

With the development of electronic technology, more and more high-performance and high-power equipment are installed on the aircraft, which additional ventilation cooling system to ensure the normal operation of the equipment. The typical cooling methods of ARINC standard equipment are summarized in this paper, and the flow design conditions of equipment ventilation cooling system are proposed according to ARINC standards and specifications. Under the assumption of isentropic flow and ideal gas conditions, the mathematical models of cooling flow of equipment cooling system are established and the design method of equipment cooling system are put forward. For a newly installed electronic equipment, the electronic equipment cooling system is designed, and the cooling capacity of the equipment cooling system is analyzed by CFD, which provides a reference for the equipment cooling scheme of subsequent installed equipment.