Drawing-in layout aircraft air inlet passage with power rear output of engine

Abstract

A drawing-in layout aircraft air inlet passage with power rear output of an engine comprises an air inlet passage base body arranged on the back portion of an aircraft nose and composed of an air inlet passage inlet, an air inlet passage pipeline and an air inlet passage outlet; the air inlet passage pipeline is gradually bent through the air inlet passage inlet and is reversely transited to the air inlet passage outlet, and finally a C-shaped pipeline is formed; in order to improve the air inlet efficiency of the air inlet passage, distortion of the air inlet passage outlet is reduced, the air inlet passage inlet is provided with an air inlet passage partition channel, and part of boundary layer airflow is eliminated; the back type C-shaped drawing-in converging type air inlet passage isadopted, the performance is high, the total pressure restoring coefficient of the air inlet passage outlet in a typical flying state can reach 0.99, the outlet flow field quality is good, a stable flow field needed by working of the engine can be provided, then normal and stable work of the engine is ensured, and influence of the air inlet passage on the total layout of an aircraft is well reduced.

Description

technical field [0001] The invention relates to the technical field of aircraft aerodynamic design, in particular to a pull-in layout aircraft air inlet with engine power output afterward. Background technique [0002] In general, turboprop aircraft are divided into push type and pull type. The engine equipped with pull type turboprop aircraft is generally a power output engine with front air intake, and the propeller is installed at the front of the engine; push type turboprop aircraft The engine is generally installed at the tail of the aircraft, which is the output engine after the power, the nose intake, and the propeller is installed at the rear of the engine. The required airflow of the turboprop aircraft with the above two layouts enters directly or deflects 90° through the air inlet. For the engine, if the axial-flow air-intake engine with rear power output is installed on a pull-in layout propeller aircraft, the air inlet of the aircraft engine faces the rear, and a...

AI Technical Summary

Problems solved by technology

[0002] In general, turboprop aircraft are divided into push type and pull type. The engine equipped with pull type turboprop aircraft is generally a power output engine with front air intake, and the propeller is installed at the front of the engine; push type turboprop aircraft The engine is generally installed at the tail of the aircraft, which is the output engine after the power, the nose intake, and the propeller is installed at the rear of the engine. The required airflow of the turboprop aircraft with the above two layouts enters directly or deflects 90° through the air inlet. For the engine, if the axial-flow air-intake engine with rear power output is installed on a pull-in layout propeller aircraft, the air inlet of the aircraft engine faces the rear, and at this time, the incoming flow needs to be deflected by 180° before entering the engine inlet, and the airflow turning angle is large , it is very easy to cause airflow separation in the inner pipeline, which will easily cause the engine to not work stably and affect the performance of the aircraft

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