Pre-whirling type pintle injector applied to double-component liquid propellant rocket engine

A liquid rocket and engine technology, which is applied in rocket engine devices, machines/engines, mechanical equipment, etc., can solve the problems of low effective mixing efficiency, achieve the effects of improving mixing efficiency, improving working life, and expanding the scope of application

CN108286478AActive Publication Date: 2018-07-17BEIJING INST OF CONTROL ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-07-17

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Abstract

The invention discloses a pre-whirling type pintle injector applied to a double-component liquid propellant rocket engine. The pre-whirling type pintle injector applied to the double-component liquidpropellant rocket engine comprises a center rod, an inner nozzle, an outer nozzle and a connecting ring, all of which are rotation bodies. The inner nozzle coaxially sleeves the center rod, and a cavity for conveying fuel is formed by the inner nozzle and the center rod. The outer nozzle coaxially sleeves the outer nozzle, a cavity for conveying an oxidizing agent is formed by the outer nozzle andthe inner nozzle, and the connecting ring coaxially sleeves the outer nozzle. Pre-whirling treatment is conducted before oxidizing agent spraying-out, and the problem that a conventional pintle injector is not high in effective mixing efficiency is effectively solved; meanwhile, through the arrangement of two rows of fuel direct flow injection holes, cooling to a liquid film on the wall face of athrust chamber through propellant is effectively achieved; and the performance and the reliability of the double-component liquid propellant rocket engine can be obviously improved.
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Description

technical field

[0001] The invention relates to a pre-rotating pintle injector applied to a dual-component liquid rocket engine, especially suitable for a high-performance dual-component space liquid rocket engine, and belongs to the field of space propulsion technology. Background technique

[0002] The pintle injector has been widely used in space liquid rocket engines due to its advantages of simple structure, uniform mixing and easy adjustment of variable thrust. In the prior art, the pintle injector usually adopts the way of vertical mutual collision of propellants for atomization and mixing, which has the following disadvantages:

[0003] First, due to the excessive impact angle of the two propellants, the mixing efficiency of the propellants in the combustion chamber is not high, which restricts the improvement of engine performance.

[0004] Second, the composite angle after the propellants collide with each other is related to the flow ratio of the two propellants,...

Examples

Embodiment Construction

[0030] In order to make the solution of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0031] Such as figure 1 As shown, a pre-rotating pintle injector applied to a bicomponent liquid rocket engine includes a central rod 1, an inner nozzle 2, an outer nozzle 3 and a connecting ring 4; a central rod 1, an inner nozzle 2, an outer nozzle 3 and the connecting ring 4 are both rotary bodies; the inner nozzle 2 is coaxially set on the center rod 1, and forms a cavity for delivering fuel with the center rod 1, and the outer nozzle 3 is coaxially set on the inner nozzle 2, and A cavity for transporting oxidant is formed with the inner nozzle 2, and the connecting ring 4 is coaxially sleeved on the outer nozzle 3.

[0032] Such as figure 2 As shown, preferably, the central rod 1 is a solid cylinder, one end of the central rod 1 is provided with a cylindrical step 11 , and ...