Biaxial Rotational Deformation Channel Without Sharp Angle Internal Waverider Variable Geometry Inlet

Abstract

The invention discloses an inner wave rider type variable geometry air inlet duct deformed when rotating around two shafts and free of sharp corners in a channel. The inner wave rider type variable geometry air inlet duct comprises a variable cross-section inner wave rider air inlet duct body with osculating face arrangement improved, a variable geometry type flow channel adjusting machine which rotates around the two shafts and is of the sealed type, a flow division mechanism and the fixed geometry expansion channel. Shapes of an inlet and an outlet of the variable cross-section inner wave rider air inlet duct body can be customized. The inner wave rider type variable geometry air inlet duct has obvious advantages in flow coefficient when working within the full Mach number scope; the air inlet duct is high in compression efficiency; and of the outlet is good in airflow quality. The inner wave rider type variable geometry air inlet duct has the beneficial effects that the air inlet duct inherits advantages of an inner wave rider air inlet duct on the aspect of design of the Mach number state; in addition, the technical advantages of the inner wave rider air inlet duct and comparatively ideal geometry deformation capability can be maintained; the inner wave rider type variable geometry air inlet duct can be applicable to the wide Mach number scope; under various Mach numbers, smoothness of an inner compression type face is maintained, and angle area flow is eliminated; and in the whole work Mach number scope, the inner wave rider type variable geometry air inlet duct is great in flow capturing capability, high in compression efficiency, high in total pressure recovery and kinetic energy efficiency level, small in external resistance and the like.

Description

technical field [0001] The present invention proposes a dual-axis rotating and deformable channel with no sharp angle internal waveriding variable geometry inlet, and relates to a full three-dimensional high-speed geometry variable air inlet based on variable cross-section internal waveriding inlet. The air inlet technology can be used in a turbo-based combined cycle engine, and its design technology belongs to the field of air-breathing aircraft high-speed air inlet. The channel has no sharp angle and the waveriding variable geometry inlet is based on the variable geometry design of the waveriding high speed inlet with variable cross section, which inherits the advantages of the waveriding inlet, and the variable geometry scheme is suitable for special-shaped compression surfaces , can ensure the airflow sealing of TBCC inlet. The intake system can start and work in the full Mach number range, with strong flow capture capability, high compression efficiency, and good outlet ...

AI Technical Summary

Problems solved by technology

However, in order to achieve geometric deformation in Aerojet's design, several protrusions approximately triangular prisms are set in the high-speed compression section of the intake duct. At most Mach numbers (not the highest Mach number), this design makes high-speed compression The corner flow appears in the section, which increases the complex shock wave structure and increases the wetting area of ​​the airflow, so its performance is still not ideal

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