Performance analysis and improvement of turbine-powered air cycle system

In order to reduce the engine bleed air consumption of fighter jet environmental control systems with high-power electronic equipment compartments, a comparative analysis was conducted on the typical turbine-powered closed cycle systems TP-ACS/HPWS and PTMS-ACS/HPWS. On this basis, improvements were made to PTMS-ACS/HPWS, and the TP-CACS architecture was proposed. The influence of flight conditions, electronic cabin heat load, and other parameters on the engine bleed air consumption of the three systems was analysed through modelling and calculation. The calculation results show that by adjusting the operating pressure and flight altitude, PTMS-ACS/HPWS generally consumes less engine bleed air than TP-ACS/HPWS, and its operation adjustment is more convenient; on this basis, a turbine-powered closed air cycle system TP-CACS with independent regulation of cabin air supply is proposed, and under different electronic cabin thermal loads and flight conditions, the TP-CACS engine has the lowest bleed airflow consumption and the best performance; one of the development directions for future environmental control systems is to combine closed loop systems with independent cabin air supply.