Supersonic mixing reinforcing device

Abstract

The invention relates to a supersonic mixing reinforcing device, which comprises a mixing reinforcing plate arranged between the two supersonic flow channels of the two supersonic air flows, wherein the upper side plate surface of the mixing reinforcing plate is provided with a concave cavity recessed from the upper side plate surface to the lower side plate surface; a section of the mixing reinforcing plate after the concave cavity and up to the end of the mixing reinforcing plate is called an oscillation plate; a mixing reinforcing plate, wherein a first supersonic flow channel for flowing afirst supersonic air flow is arranged above the mixing reinforcing plate, and a second supersonic flow channel for passing through a second supersonic air flow is arranged below the mixing reinforcing plate; the first supersonic air flow flows over the mixing reinforcing plate along the length direction of the mixing reinforcing plate to the tail end of the mixing reinforcing plate, and the second supersonic air flow below the mixing reinforcing plate flows along the length direction of the mixing reinforcing plate to the tail end of the mixing reinforcing plate, the first supersonic air flowand the second supersonic air flow realize enhanced mixing outside the tail end of the mixing reinforcing plate. By means of the invention, the energy of the supersonic air flow is utilized to achieve the effect of active mixing enhancement.

Description

Technical field [0001] The invention relates to a hybrid enhancement device in the field of aerospace, in particular to a device that uses self-excited oscillation for supersonic mixing enhancement. Background technique [0002] In aerospace engines, the mixing of two air streams is widely involved. For example, in the afterburner of a turbofan engine, it is necessary to mix the center gas with the outer air. In the combustion chamber of a rocket-based combined cycle engine, rocket gas and ram air are required to mix. Efficient mixing is one of the key technologies to improve the performance of this type of engine. There are two ways to enhance mixing: passive hybrid enhancement and active hybrid enhancement. [0003] The passive mixing enhancement technology relies on the shape change of the flow channel or the partition to induce an unstable vortex structure to achieve mixing enhancement. Typical passive hybrid enhancement devices include lobes, delta wings, and fins. The pap...

AI Technical Summary

Problems solved by technology

[0005] However, the above two types of mixing enhancement devices are difficult to be practical in supersonic airflow

Passive mixing enhancement is due to the generation of shock waves and other reasons, and the flow resistance is large; second, due to the strong compressibility of supersonic speed, the growth of the mixing layer is inhibited, and the mixing enhancement efficiency is low

Active hybrid enhancement is due to the need for an external excitation device, the structure is complex, and it is difficult to install in practice; the second is that the frequency and amplitude of the excitation are basically fixed, and the adaptability is poor

Images