Global Optimal Turbofan Engine Inlet Noise Reduction Design Method
A turbofan engine, global optimal technology, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problem that the noise reduction optimization problem cannot be solved well, and achieve saving calculation costs, broad application prospects, applicable wide range of effects
Active Publication Date: 2020-07-31
AECC COMML AIRCRAFT ENGINE CO LTD
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0016] The technical problem to be solved by the present invention is to overcome the defect that the turbofan engine inlet noise reduction optimization problem involving a large number of design parameters cannot be well solved in the prior art, and to provide a globally optimal turbofan engine inlet noise reduction design method
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0063] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0064] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.
[0065] figure 1 It is a flow chart of the present invention's global optimal turbofan engine inlet noise reduction design method.
[0066] Such as figure 1 As shown, in one embodiment of the present invention, a kind of global optimal turbofan engine inlet noise reduction design method is provided, and it comprises the following steps:
[0067] Step 1: Take sample points in the design space for experimental design.
[0068] Step 2: fir...
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
Login to View More Abstract
The invention provides a global optimal noise reduction design method for a turbofan engine inlet. The method comprises the following steps of S1, obtaining a sample point in a design space to perform experiment design; S2, firstly calculating a background flow field value of the sample point and then calculating a noise value based on the background flow field to obtain a response value of the sample point; S3, obtaining a local optimal design point by adopting an adjoint method; S4, building an agent model based on the sample point and the response value of the sample point; and S5, after the agent model is built, performing efficient optimization design on the agent model by using a culture gene algorithm. According to the global optimal noise reduction design method for the turbofan engine inlet, a global optimal solution can be found and the calculation expense is greatly reduced; in the presence of a large amount of design variables, the adjoint method has huge advantages in comparison with other optimization design methods, so that low-noise optimization design of a multi-parameter complex shape is realized; and the design method has a very high research value and a wide application prospect.
Description
technical field [0001] The invention relates to the field of turbofan engine aerodynamic noise control, in particular to a globally optimal design method for turbofan engine inlet noise reduction. Background technique [0002] In the field of aircraft, the problem of aircraft noise presents an important issue for the continuously growing air transport industry. The size of its noise level is directly related to the acquisition of aircraft airworthiness visa. This is undoubtedly a huge challenge for the civil airliner being developed in our country. [0003] As one of the main sound sources of aircraft noise, the noise form (directivity, radiated sound power) of engine noise has changed greatly. The airflow velocity discharged from the traditional low bypass ratio engine is very high, and the jet flow and shock wave noise are the main noise sources. Nowadays, in order to pursue high efficiency, the bypass ratio of civil turbofan engines is getting bigger and bigger, even e...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/20
CPCG06F30/15G06F30/367G06F2111/04G06F2113/14G06F2119/10Y02T90/00
Inventor 邱昇
Owner AECC COMML AIRCRAFT ENGINE CO LTD