Modeling of Thermal and Aerodynamic Processes in Communication Units

This work is dedicated to thermal and aerodynamic processes modeling, occurring in “BDCM-386” (Board Digital Calculating Machine - 386). This device was constructed to be exploited as a data and information processor and developed by OJSC “RKPB” (“Ramenskoye priborostroitelnoye konstruktorskoye byuro”) and is being used in the complex of on board devices of MIG-29 aircraft. The goal of this work was to check how rational was the use of cooling systems in the researched device, taking into consideration specifications of the unit and parameters of it’s structural units. Modeling was produced using the following semi-systems: 1. ASONIKA-T (thermal processes modeling in the unit – calculating average temperatures of the device’s conjunctions) 2. ASONIKA-P (thermal and aerodynamic processes modeling in the device – as one of the results, calculating peak conditions for thermal modeling of the printing joint inside the unit) 3. ASONIKA-TM (thermal processes modeling of the printing joint, which is the part of the unit) In the first chapter different aspects of mathematical modeling of thermal and aerodynamic processes are observed, occurring inside of the unit. Major macromodels of researched processes are studied in order to understand how to calculate characteristics and parameters of the following processes without using any engineering software. The second chapter is dedicated to the theoretical part of modeling, major theseses include analysis of modeling software – stage by stage analysis of ASONIKA semi-systems functional. The chapter includes the project of stage by stage modeling of the unit as total and one of the printing joints. In the third part results of modeling of thermal processes of the unit are given, as well as aerodynamic processes inside the device and thermal modeling of the printing joint. All results were analyzed and deductions were made based on the results of the research.