Performance Research on the High-Altitude Valve of an Aero-Engine Ventilation System

Abstract

For aero-engines, high-altitude valve is a key component, which is important to the high-altitude performance of ventilation system. However, theoretical researches or experimental tests of high-altitude valve are rare. To define whether the high-altitude valve can work normally during the whole flight envelope and to offer relational information for the improve design, this article focuses on the operation process and characteristic computation of high-altitude valve. Based on operational principle and structural analysis, using mechanics method, the high-altitude characteristic computation of high-altitude valve was done and the flight height where the valve closes was identified. In the same way, we analysed the static characteristic, getting the inner-cavity pressure in high-altitude flying state. Compared with the experimental results, the analytical methods and calculated values are validated to be accurate. The characteristic curves obtained can be directly used in the check and acceptance or further design of high-altitude valve.

Electromagnetic Characteristics Analysis and Structure Optimization of High-Speed Fuel Solenoid Valves

“…As to the aircraft failure, more than 50% of accidents are reported to come from the engines, while the gas path failure could account for 90% of the total engine failure [6]. High speed fuel solenoid valve (HFSV) is an important control element in the aerospace field, which is mainly used in aero-engine guide vane regulating systems [7,8]. With the help of HFSV, the real-time and accurate adjustment of stator blade angle could be achieved to improve the surge margin of compressors and expand the stable working range of engines, which ensures the safe and reliable operation of aero-engines.…”