Design method of TBCC exhaust nozzle adjusting mechanism based on double-shifting-piece type sliding block principle

A double paddle type and design method technology, applied in the direction of machines/engines, jet propulsion devices, etc., can solve the problems of aggravated flow loss, etc., and achieve the effects of reducing gas flow loss, reducing space occupation, and saving thrust

CN114000958AActive Publication Date: 2022-02-01XIAMEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-02-01

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Abstract

The invention relates to the technical field of TBCC exhaust nozzles, in particular to a design method of a TBCC exhaust nozzle adjusting mechanism based on the double-shifting-piece type sliding block principle. The method comprises the steps that 1) a round-to-square exhaust nozzle overall structure is adopted; 2) a double-shifting-piece type sliding block is designed, and the airflow performance is guaranteed during rotation; 3) a rotating shaft is hinged to the outer end of the double-shifting-piece type sliding block, continuous adjustment is achieved in the door body opening process, and starting and stopping are achieved at any time; and 4) the upper and lower edges of the double-shifting-piece type sliding block are tightly attached to the upper and lower wall contours of the square area of the exhaust nozzle in shape design, and the sealing characteristic of the ventilation opening is ensured during closing. The exhaust nozzle adjusting mechanism adopts a translation and rotation mode, the two sides of the exhaust nozzle are respectively provided with a push rod, a rotating rod and a shifting piece type sliding block, a motor drives connecting rods on the two sides to translate, the connecting rods drive the rotating rods to rotate, the shifting piece type sliding block with one end fixed is made to rotate, and opening and closing of the exhaust nozzle are achieved. The throat area of the convergent type exhaust nozzle can be changed, starting and stopping can be conducted at any time, continuous adjustment is achieved, the thrust requirement is met, and the air tightness condition is met when the exhaust nozzle is completely closed.
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Description

Technical field

[0001] The present invention relates to TBCC tailpipe technology, and particularly relates to a design method based on the adjustment mechanism TBCC tailpipe principle double slider type paddles. Background technique

[0002] Achieve hypersonic flight is to enhance my country's comprehensive national strength important technological means, but only by a single air-breathing engine is difficult to achieve hypersonic flight. Therefore, in order to meet the hypersonic flight, combined engine came into being.

[0003] Combined engine comprises of RBCC (rocket-based combined cycle) engines and TBCC (Turbine-Based-Combined-Cycle, a turbine based combined cycle) engines two categories. TBCC wherein the engine is a turbine engine (including turbojet, turbofan engine) and the ramjet two techniques (including sub-combustion, combustion and dual-mode ultra-combustion ramjet) combining developed, which incorporates a turbine engine and ramjet advantage in their respective app...

Examples

Embodiment Construction

[0025] The invention is further described below by way of specific embodiments.

[0026] The present invention provides a nozzle adjustment mechanism based on two tail TBCC paddle type slider principle, for the purposes of this invention, the design and the effect is more clear and unambiguous, the drawings of the present invention will be further described in detail. It should be understood that the specific embodiments described herein are merely content to explain the present invention but are not intended to limit the present invention.

[0027] The present invention is based on the principle of double-paddle type slider, the slider design of the present mechanism paddle type a special structure, the use of two sets of the sheet reaches the point of tangency of the slider can be made fully closed rectangular duct characteristics, as designed figure 1 Tailpipe adjustment mechanism shown. The adjusting mechanism comprises tailpipe paddle type slider 1, round to rectangular tail ...