Winglet for increasing pneumatic efficiency of horizontal tail of time-domain airplane

Abstract

The invention provides a winglet for increasing pneumatic efficiency of a horizontal tail of a time-domain airplane. The winglet has a pneumatic profile as below: a wing root employs a NACA0012 aerofoil profile and has a chord length of 500 mm; a wingtip employs a NACA0009 aerofoil profile and has a chord length of 300 mm; a ratio of wing root to wingtip of the winglet is 0.6; a stretched length of the winglet is 800 mm; a profile from the wing root to the wingtip of the winglet is in linear transition; the winglets are uprightly arranged on stabilizers of horizontal tails on two sides of the airplane and on a position 75% of a horizontal tail stretched length; an upper surface and a lower surface of each horizontal tail are respectively provided with a winglet, and totally four winglets are in symmetry in the left-right direction. The invention has advantages that without changing a basic dimension of the horizontal tail, winglets are added to realize goals of increasing pneumatic efficiency of the horizontal tail and improving airplane course stability. As the basic profile dimension of the horizontal tail remains unchanged, the arrangement positions of the winglets are optimized and have little influence on an elevator; and tests also show that addition of the winglets causes no unfavorable influence on elevator control rule.

Description

technical field [0001] The invention relates to a winglet for improving the aerodynamic efficiency of an aircraft horizontal tail in the time domain, and belongs to the technical field of aircraft aerodynamics. Background technique [0002] The characteristics of the Y12IV aircraft time domain aircraft structure is that the Y12IV aircraft is used as the carrier aircraft, and a specific electromagnetic signal is emitted by hanging and installing cables around the aircraft, and then the ground reflection signal is collected by the detection pod dragged at the tail, and underground minerals are detected according to the reflection signal . In order to meet the above requirements, it is necessary to modify the shape of the Y12IV aircraft. This modification design is the first time in China. Because the modification involves a wide range, the shape of the Y12IV aircraft has changed a lot after modification, which has a great impact on the original aerodynamic characteristics of t...

AI Technical Summary

Problems solved by technology

In order to meet the above requirements, it is necessary to modify the shape of the Y12IV aircraft. This modification design is the first time in China. Because the modification involves a wide range, the shape of the Y12IV aircraft has changed a lot after modification, which has a great impact on the original aerodynamic characteristics of the aircraft. a greater negative impact

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