DSI inlet port with hybrid compression profile and its construction method

Abstract

The invention discloses a DSI air inlet with a mix-compression profile surface, wherein the DSI air inlet successively includes a wedge-shaped shock wave compression surface, a first circular-conical shock wave compression surface, a second circular-conical shock wave compression surface, a third circular-conical shock wave compression surface, a fourth circular-conical shock wave compression surface and an inlet contour line of the air inlet. A plurality of air exhaust gaps are formed nearby an inlet throat. The invention also discloses a construction method of the DSI air inlet with a mix-compression profile surface. The DSI air inlet is improved in attack angle adaptability, is improved in compression shock wave stability, is improved in aerodynamic performance of an air vehicle and is enhanced in dynamic and steady-state performances of the air inlet.

Description

technical field [0001] The invention relates to a DSI inlet, in particular to a DSI inlet with mixed compression profiles. [0002] The invention also relates to a method for constructing a DSI intake port with mixed compression profiles. Background technique [0003] DSI inlet (also known as supersonic inlet without boundary layer, English name Diverterless Supersonic Inlet, abbreviated as DSI inlet) is a non-adjustable supersonic inlet that has emerged in recent years. Because it cancels the traditional separation of the supersonic inlet to remove the boundary layer technology, and instead relies on the transverse pressure gradient on the compression profile before the inlet of the inlet to drive the boundary layer to overflow to the outer edge of the inlet. Therefore, the supersonic air inlet simplifies the structure, reduces the weight, and reduces the cost of manufacturing and use and maintenance under the premise of keeping the air intake performance parameters such a...

AI Technical Summary

Problems solved by technology

The DSI inlet technical scheme with multi-stage conical compression surfaces in series has better air intake performance when the inlet works at the design point, but for aircraft with a large range of flight conditions such as flight attitude and speed, when the flight When the condition changes and the inlet port works at a non-design point, the shock wave system generated by the series multi-stage conical compression surface in front of the inlet port inlet will have a relatively large change, which will cause the air flow state of the inlet port to deviate from the design state More, the air intake performance of the intake port will drop more

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