Numerical Simulation on Excluding Foreign Objects from Engine Inlet of Turboprop Aircraft

Abstract

Hail, ice and other foreign matters are sucked into the intake port and then enter the engine, which can easily lead the engine performance degradation or stop, threatening the flight safety. Therefore, it is of great significance to analyze the exhaust characteristics of the channel beside the intake port of turboprop aircraft. According to the airworthiness criterion, two kinds of foreign bodies, hail and ice, are analyzed to determine their geometry, mass and initial attitude. By means of CFD and 6DOF method, the movement and exclusion characteristics of foreign bodies in the main engine inlet of a new turboprop regional aircraft are simulated. Further coupling the LS-DYNA software to simulate and analyze the collision problems encountered in the exclusion. A numerical simulation method for the removal of foreign matter from the intake port of turboprop engine is established. The results show that once the foreign body collides with the wall, it will break up into some small pieces. The energy loss is less threatening to the engine. Whether it enters the main engine or the side channel, it can be considered to be eliminated; However, the ice in the ice area of the lower wall is likely to enter the main engine directly, which may cause serious impact, so it needs to be focused on