Rocket based combined cycle engine rocket ejector T-type layout

Abstract

The invention discloses a rocket based combined cycle engine rocket ejector T-type layout comprising a central supporting plate rocket ejector and a plurality of side-wall rocket ejectors. The side-wall rocket ejectors are located above the central supporting plate rocket ejector. The front portions of the side-wall rocket ejector are connected to rocket combustion chamber pipelines, the central supporting plate rocket ejector is connected to a combustion chamber through upper-side pipelines, and the section of two sets of rockets is the interface of an insulating segment and a mixing segment. By means of limitation on T-type rocket ejector layout size, and a layout manner with smaller duty ratio than a full throughout central supporting plate layout manner and larger wetted perimeter than a side-wall layout manner is provided; congestion effect on the insulating segment of a full throughout supporting plate type rocket ejector and flight drag of scramjet mode are reduced, and cutting area of a primary jet flow and secondary jet flow are increased; the scalability of the rocket ejector T-type layout is high, and the rocket ejector layout is designed according to different mixing segment inlet section sizes so as to acquire excellent engine performance.

Description

technical field [0001] The invention belongs to the field of rocket ramjet engines, and in particular relates to a rocket-based combined power cycle engine ejector rocket T-shaped layout. Background technique [0002] The Rocket-Based-Combined-Cycle (RBCC) engine has reusability, low cost and high reliability, and is regarded as one of the propulsion systems most likely to be applied to the future space-to-ground transportation system. Under different flight Mach numbers, the engine works with different thermodynamic cycles in the same flow channel, and realizes wide-range flight in the same flow channel. The climbing stage is divided into ejection mode, sub-combustion mode and super-combustion mode. And pure rocket mode four working modes. The ejection rocket in the runner plays the role of ejecting air, injecting fuel, generating thrust, and igniting in the ejection mode, and mainly plays the role of ignition and flame stabilization in the sub-combustion mode and super-co...

AI Technical Summary

Problems solved by technology

The binary structure engine is further divided into a support plate ejection rocket configuration in which the ejector rocket is installed in the center of the engine isolation section and a side wall ejection rocket configuration installed above the engine isolation section. The center support plate ejection rocket is provided by Aerojet, USA. The company proposed, such as the document "The Strutjet Engine: The Overlooked Option For Space Launch" (AIAA95-3124, 1995: 1~14), the advantage of this launching rocket layout method is the comparison of the shear area between the primary flow and the secondary flow Large, it is beneficial to improve the ejection efficiency, but the main support plate has a greater blocking effect on the flow channel, which will bring greater flight resistance in the super-combustion mode

In the existing side-wall ejection rocket layout, the ejector rocket is arranged above the isolation section, and the wet circumference of the ejection rocket is small, resulting in a small contact area between the primary flow and the secondary flow, resulting in a large loss of rocket performance and low ejection efficiency. Low

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