Pneumatic type/mechanical type combined adjustment mach number 0-7 stage combined engine air inlet

A Mach number and mechanical technology, applied in the direction of machines/engines, mechanical equipment, jet propulsion devices, etc., can solve problems such as large effective use of space, low reliability, increased intake weight, etc., to improve flow coefficient and work The effect of simple performance and actuation mode and small space occupation

CN107448296AActive Publication Date: 2017-12-08NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-12-08

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Abstract

The invention discloses a pneumatic type / mechanical type combined adjustment mach number 0-7 stage combined engine air inlet. The pneumatic type / mechanical type combined adjustment mach number 0-7 stage combined engine air inlet is mainly composed of a high-speed channel, a low-speed channel, a mechanical type variable geometry assembly and a pneumatic type shock wave adjusting assembly. Under the low-speed mode, the mechanical type variable geometry assembly is adopted for adjusting the throat area and the internal shrinkage ratio of the air inlet, and the low mach number starting performance and the high mach number compression performance of the air inlet are guaranteed; and under the high-speed mode, the pneumatic type shock wave adjusting assembly is used for adjusting the precursor shock wave position, the precursor shock wave sealing state is kept, and the discharge coefficient and the working performance of the air inlet are obviously improved within the wide mach number scope. According to the pneumatic type / mechanical type combined adjustment scheme, the compression amount and the precursor shock wave position of the air inlet can be continuously adjusted, it is guaranteed that the combined engine air inlet can effectively work within the wide mach number scope, and the good pneumatic performance is obtained.
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Description

technical field

[0001] The invention relates to the field of aircraft design, in particular to a combined engine inlet. Background technique

[0002] The air-breathing combined engine has many advantages such as wide operating range, high reliability, reusability, horizontal take-off and landing, and high specific impulse, making it an ideal power plant for hypersonic vehicles. As an important part of the air-breathing combined engine propulsion system, the intake duct not only efficiently provides air with a certain pressure, temperature and flow rate to the engine in a wide range of Mach numbers, but also shoulders the responsibility of working mode conversion, outlet flow field, etc. Functions such as uniformity adjustment and isolation of upstream and downstream disturbances. For this reason, the wide Mach number range performance of this type of inlet is one of the key technologies for the development of air-breathing combined engines.

[0003] The air-breathing combi...

Examples

Embodiment Construction

[0020] see figure 1 , figure 2 and image 3, the invention discloses a pneumatic / mechanical combined adjustment Mach number 0-7 combined engine intake port, including a high-speed passage 1 extending from front to rear, located inside the high-speed passage and extending from front to rear side by side with the high-speed passage The low-speed channel 2, the precursor compression surface 7, the side walls 6 located on both sides of the high-speed channel, the low-speed channel and the precursor compression surface, the base 11 located below the precursor compression surface and extending backward, located between the high-speed channel and the low-speed channel The high-speed / low-speed passage divider 5 between the high-speed passage and the rotating lip cover 4 that is hinged at the front end of the divider divider and extends forward; The engine 27 is connected, the inner wall of the low-speed channel 2 is a mechanical variable geometry component, and the outlet of the lo...