Unlock instant, AI-driven research and patent intelligence for your innovation.

Separated exhausting type three-bypass turbofan engine simulation model

A turbofan engine and simulation model technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve the problem of blank installation performance and achieve high practical value

Inactive Publication Date: 2017-11-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic research [Liu Zengwen, Wang Zhanxue, Cai Yuanhu. Numerical simulation of variable cycle engine mode transitions [J]. Aerodynamics Journal, 2011, 26(9): 2128-2132.], [Zhou Hong, Wang Zhanxue, Liu Zengwen, et al. Research on variable cycle characteristics of external connotation variable cycle engine[J].Acta Aeronautical Sciences,2014,35(8):2126-2135.], [Zhu Zhili, Li Dong. Influence of geometric adjustment on performance of variable cycle turbofan engine[J] .Journal of Aerodynamics, 1999,14(1):35-38.] Most of them are in the concept simulation stage, and the actual machine verification has not been reported. blank

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Separated exhausting type three-bypass turbofan engine simulation model
  • Separated exhausting type three-bypass turbofan engine simulation model
  • Separated exhausting type three-bypass turbofan engine simulation model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0031] figure 1 It shows the basic structure of a turbofan engine with separate exhaust and three ducts. Compared with conventional turbofan engines, the engine adds a third duct for separate exhaust. figure 2 Schematic diagram of valve selection for this engine off mode in dual culvert mode (similar to a conventional turbofan engine).

[0032] Unlike a dual bypass variable cycle engine with a core driven fan stage (CDFS), the split exhaust triple bypass turbofan engine third bypass flow is not directly blended with the main bypass flow, but by adjusting the third bypass flow The throat area of ​​the tail nozzle is matched with the mode selection valve to control the flow and pressure of the third duct inlet.

[0033] The opening and closing of the mode selection valve directly determines the working mode of the engine. The model including the mode ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a separated exhausting type three-bypass turbofan engine simulation model and belongs to the technical field of system control and simulation in aerospace propulsion theory and engineering. For structure characteristics of a separated exhausting type three-bypass turbofan engine, component-level mathematic models of a third bypass and a bypass exhaust nozzle are built, and by further utilizing a level stacking method, component-level models of a fan, an intermediate pressure compressor and a high pressure compressor are built; and the simulation model can perform relatively high-precision simulation on thrust of the separated exhausting type three-bypass turbofan engine, can simulate engine thrust states under different flight conditions, and has relatively high practical values.

Description

technical field [0001] The invention relates to a turbofan engine simulation model, in particular to a separate exhaust three-duct turbofan engine simulation model, which belongs to the technical field of system control and simulation in aerospace propulsion theory and engineering. Background technique [0002] For the sixth-generation U.S. fighter jet, its strategic and tactical advantages, such as supersonic cruise and combat, ultra-conventional maneuvering, super stealth, ultra-long-range strike, and real-time control beyond the physical and information domains, are favored by all countries. Among them, the most important breakthrough of this type of engine is the "three-channel" technology. The traditional turbofan engine has two airflow forms, the core engine and the duct, and the sixth-generation engine has a third external duct. [0003] The third airflow of the external duct is generated by an adaptive fan. Closing the external duct can increase the thrust during tak...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 陈浩颖张海波李秋红杜瑶刘明磊居新星
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS