How does it have yaw control?
TL;DR at the end "This application pertains to the field of aero-engine technology, specifically relating to a spherical convergent two-dimensional vector nozzle spherical mating structure, comprising: an exhaust cylinder, a movable spherical shell, a fixed ring, and an actuator; the rear end of the exhaust cylinder features a spherical outer surface, the movable spherical shell includes two parts that are spherically overlapped on the upper and lower spherical outer surfaces of the exhaust cylinder; the fixed ring is hinged on the exhaust cylinder via vertical pivot shafts on its upper and lower sides, and the two movable spherical shells are hinged on the fixed ring via horizontal pivot shafts perpendicular to the engine axis on their left and right sides; each movable spherical shell is connected to two independently actuated actuators. This application innovatively proposes a spherical convergent nozzle spherical mating structure, which, without increasing the nozzle mass, optimizes the end face shapes of the exhaust cylinder and the movable spherical shells, allowing the two movable spherical shells to have rotational degrees of freedom in both vertical and horizontal directions, thereby achieving the goal of increasing the nozzle yaw angle range and throat adjustment range.
Technical Field
[0001] This application belongs to the field of aero-engine technology, specifically relating to a spherical convergent two-dimensional vector nozzle spherical mating structure.
Background Art
[0002] Traditional axisymmetric vector nozzles used in aero-engines suffer from reduced thrust efficiency when deflected. The spherical convergent two-dimensional vector nozzle is an advanced multifunctional nozzle structure that effectively addresses this issue. The convergent section of this nozzle is spherical, and the expansion section is rectangular. Besides pitch capability, this nozzle also has certain yaw capabilities. The yaw capability is achieved by the rotation of the movable spherical shells around the spherical center of the exhaust cylinder. The existing movable spherical shells and exhaust cylinder have flat end faces, resulting in a limited yaw angle adjustment range, which cannot meet the high maneuverability requirements of advanced fighter aircraft. Therefore, it is necessary to optimize the end faces of the movable spherical shells and the exhaust cylinder to improve the maneuverability of the spherical convergent two-dimensional vector nozzle.
Summary of the Invention
[0003] To solve the above problems, this application provides a spherical convergent two-dimensional vector nozzle spherical mating structure, comprising:
[0004] An exhaust cylinder, movable spherical shells, a fixed ring, and actuators;
[0005] The rear end of the exhaust cylinder has a spherical outer surface, and the movable spherical shells include two parts that are spherically overlapped on the upper and lower spherical outer surfaces of the exhaust cylinder;
[0006] The fixed ring is hinged on the exhaust cylinder via vertical pivot shafts on its upper and lower sides, and the two movable spherical shells are hinged on the fixed ring via horizontal pivot shafts perpendicular to the engine axis on their left and right sides; each movable spherical shell is connected to two independently actuated actuators.
[0007] Preferably, the two actuators are distributed between the vertical pivot shaft and the horizontal pivot shaft in the vertical direction, on both sides of the vertical pivot shaft.
[0008] Preferably, the rear edge of the movable spherical shell is flat, and the upper and lower movable spherical shells form a rectangular outlet.
[0009] Preferably, the left and right sides of the movable spherical shell are convex structures, and the middle of the inlet of the movable spherical shell is a concave structure.
[0010] Preferably, the upper and lower edges of the rear end face of the exhaust cylinder are swept-back structures, and the upper and lower sides are recessed structures.
[0011] Preferably, the front section of the exhaust cylinder is a gradually contracting cylinder.
[0012] Preferably, the end face of the exhaust cylinder has a mating flange, and the actuators are installed on the mating flange.
[0013] The advantages of this application include: this patent innovatively proposes a spherical convergent nozzle spherical mating structure, which, without increasing the nozzle mass, optimizes the end face shapes of the exhaust cylinder and the movable spherical shells, allowing the two movable spherical shells to have rotational degrees of freedom in both vertical and horizontal directions, thereby achieving the goal of increasing the nozzle yaw angle range and throat adjustment range.
Description of the Drawings
[0014] Figure 1 is a three-dimensional view of the spherical convergent two-dimensional vector nozzle spherical mating structure;
[0015] Figure 2 is a simplified view of the movable spherical shell and the rear end of the exhaust cylinder;
[0016] Figure 3 is a side view of the rear end of the exhaust cylinder."
TL;DR: Yaw control is apparently done by using a spherical convergent two-dimensional vector nozzle with a unique spherical mating structure. Unlike traditional 2D TVC nozzles (which rely on flat end faces and have limited yaw adjustment), this design optimizes the end face shapes of the exhaust cylinder and movable spherical shells.
