Full-three-dimensional inward turning air inlet channel reverse design method based on curved shock wave theory

Abstract

A full-three-dimensional inward turning air inlet channel reverse design method based on the curved shock wave theory comprises the following steps of: 1) specifying full-three-dimensional incident shock waves in a full-three-dimensional reference flow field according to design requirements; 2) dispersing the full-three-dimensional incident shock waves into a series of reference planes, and solving a corresponding full-three-dimensional internal contraction basic flow field by utilizing a curved shock wave theory according to a full-three-dimensional incident shock wave angle, a shock wave curvature and a wave back parameter; 3) designing a full-three-dimensional inward turning air inlet channel outlet section, and performing streamline tracking in the full-three-dimensional internal contraction basic flow field in the step 2) to obtain a hypersonic speed full-three-dimensional inward turning air inlet channel compression profile, wherein the cross section is elliptical or quasi-rectangular; and 4) geometrically constructing a hypersonic speed full-three-dimensional inward turning air inlet channel on the basis of the full-three-dimensional inward turning air inlet channel compression profile in the step 3): according to the outlet area requirement, equally straightening or expanding and stretching a shoulder molded line to obtain a full-three-dimensional inward turning air inlet channel isolation section, and obtaining the full-three-dimensional inward turning air inlet channel based on the curved shock wave theory in the designed flight state.

Description

technical field [0001] The invention relates to the field of adjacent space hypersonic inlets, in particular to a full three-dimensional inward turning inlet inverse design method based on the bending shock wave theory. Background technique [0002] The development of near-space vehicles involves national security and peaceful use of space, and is one of the focuses of the current international competition for space technology. World powers represented by the United States and Russia are vigorously promoting their own hypersonic flight development programs (Joseph, M.H, James S.M.Richard C.M., The X-51A Scramjet Engine Flight Demonstration Program, 15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2008). The air intake is a major component in the propulsion system of a hypersonic vehicle. It is located at the front of the aircraft and is directly connected to the front of the hypersonic aircraft, compressing the incoming flow and prov...

AI Technical Summary

Problems solved by technology

At the same time, researchers generally use the traditional characteristic line method to carry out the reverse design of the reference flow field, which is not only complicated in programming, but also poor in stability, which limits the selection range of the basic flow field, thereby reducing the geometric structure range of the inlet.

It can be seen that one of the current problems restricting the performance of hypersonic inlets is the lack of a full three-dimensional inward turning inlet inverse design method based on the bending shock wave theory

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