Akademik Veri Yönetim Sistemi
HEAT TRANSFER RESEARCH, cilt.56, sa.5, ss.1-15, 2025 (SCI-Expanded)
Thermal management in aircraft is crucial to maintain thermal balance, ensure the stable operation of avionic systems and other critical components. Avionic temperatures are influenced by external factors like ambient temperature, mass flow rate, thermal load, compartment temperature, and air inlet/outlet design. The aim is to analyze temperature effects under various conditions, including cockpit temperature (297 to 303 K), airflow rates (0.10 to 0.25 kg/s), system placements, outlet designs, and equipment thermal loads (original values and +/- 10 W). Three configurations were created for analysis, revealing that a +10-W thermal load increases average avionic temperatures by 3.1 K, while a -10-W load decreases them by 3 K. Increased ventilation flow decreases avionic temperatures by 13.8 K, while higher ventilation air temperature increases them by 4.7 K. These trends demonstrate a stable pattern in temperature changes with varying thermal load, mass flow rate, and temperature alterations. Analyzing two outlets at different locations with the same area shows an average avionic temperature change of 2 K, while altering the system layout results in an average temperature difference of 7.2 K. System layout modifications may cause up to a 20 K temperature change for some equipment, leaving others unaffected. These findings highlight the impact of geometries and environmental factors on avionic equipment. Thermal load, ventilation flow, temperature changes, and system placement affect avionic temperatures differently, providing valuable insights for system optimization and avionic equipment placement.