A deployable nozzle using flexible materials and an external truss structure

Abstract

The invention provides an expandable nozzle using flexible materials and an external truss structure, which includes a rigid section of a submerged flexible nozzle, a rear head of a combustion chamber, a flexible nozzle truss structure and a flexible section of the nozzle. The submerged rigid section of the nozzle is composed of the main body of the submerged section, the rigid expansion section and the front and rear throat liners, which are easy to install, and are bonded to the rear head. Insulate the heat of the combustion chamber; after the rigid section is the flexible section of the nozzle, in order to ensure the structural and surface integrity of the nozzle and the rear head, add heat-insulating and ablation-resistant coatings to the inner walls of the flexible section and the rigid section, The flexible section uses ablation-resistant elastic material. The invention provides an expandable nozzle using flexible materials and an external truss structure, which can realize height compensation characteristics; and by designing the size of the truss structure and flexible materials, a more efficient aerodynamic profile of the expansion section can be realized, and the nozzle can be effectively improved. Manage the overall airspace performance and the overall performance of the aircraft.

Description

technical field [0001] The invention relates to an expandable nozzle, in particular to an expandable nozzle using flexible materials and an external truss structure, belonging to the technical field of aerospace. Background technique [0002] The economy and efficiency of flight are important factors to be considered first in the design of aircraft power plant. For civil aviation aircraft, the improvement of propulsion efficiency means saving more fuel and saving operating costs; for military aircraft, improving the propulsion efficiency can enable combat aircraft or missile weapons to have a higher range and stronger combat capability; For aerospace rockets, improving the propulsion efficiency of the orbiting process can bring more payloads. Therefore, improving the propulsion efficiency of aircraft propulsion devices has always been a hot research field. [0003] No matter what kind of aircraft, generally speaking, it will have its fixed design height. At this height, t...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defect that the propulsion efficiency of the traditional fixed expansion ratio nozzle decreases at non-design heights, the present invention provides an expandable nozzle using flexible materials and an external truss structure. Through the expansion of the truss structure and the deformation of the flexible material, the nozzle's The aerodynamic profile and expansion ratio can be changed according to different working heights, and the nozzle is fully inflated during the entire flight process to maximize efficiency and improve the flight performance of the aircraft

Images