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Fan and compressor rotor-stator interference broadband noise rapid prediction method by considering flow influence

A prediction method and compressor technology, applied in the aerospace field, can solve problems such as the inability to directly calculate all the parameters of the predicted fan

Active Publication Date: 2020-08-11
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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AI Technical Summary

Problems solved by technology

[0006] Commercial flow field numerical simulation software is widely used in the numerical simulation of turbomachinery, such as NUMECA, Fluent, CFX and other software, using commercial flow field numerical simulation software can obtain fans, The three-dimensional flow field results of compressor rotation and static interference, but the numerical simulation results can only give data such as the mainstream velocity field and pressure field, and cannot directly calculate all the parameters required for predicting fan and compressor rotation and static interference broadband noise , so that it is impossible to use the numerical simulation results of the flow field and the broadband noise model to quickly predict the broadband noise caused by the rotation and static interference of fans and compressors

Method used

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  • Fan and compressor rotor-stator interference broadband noise rapid prediction method by considering flow influence
  • Fan and compressor rotor-stator interference broadband noise rapid prediction method by considering flow influence
  • Fan and compressor rotor-stator interference broadband noise rapid prediction method by considering flow influence

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Embodiment 1

[0050] 1. Calculation of geometric parameters

[0051] Geometric parameters include rotor number, stator number, stator chord length, hub radius and casing radius, and these parameters do not depend on the flow field numerical simulation results.

[0052] The rotor number, stator number, stator chord length, hub radius and casing radius can be directly obtained according to the design parameters of the geometric model used in the numerical simulation of the flow field, as shown in the table below. The geometric model in this embodiment refers to the measured model.

[0053]

[0054] 2. Calculation of mainstream parameters

[0055] The mainstream parameters include rotational speed, density, sound velocity, and inlet Mach number, which can be obtained from the flow field numerical simulation settings and results, as follows:

[0056] According to the settings of the inlet boundary conditions in the numerical simulation of the flow field, the rotational speed is obtained.

...

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Abstract

The invention discloses a fan and compressor rotor-stator interference broadband noise rapid prediction method by considering flow influence. The method comprises the steps of: obtaining and substituting Geometric parameters, mainstream parameters and turbulence parameters of a measured model into a three-dimensional lift surface broadband noise model; and respectively setting different calculation frequencies in the model to obtain broadband noise sound pressure levels generated by fan and compressor rotor-stator interference under the set frequencies, and drawing the broadband noise sound pressure levels under the different frequencies into a graph to obtain a fan and compressor rotor-stator interference broadband noise spectrogram. According to the method, the flow field numerical simulation result and the fan and compressor rotor-stator interference broadband noise model can be combined, and fan and compressor rotor-stator interference broadband noise rapid prediction by considering the flow influence is achieved. According to the method, the dependence on test conditions, computing resources and computing time can be greatly reduced, the influence of turbulence pulsation in flowing can be considered, research on a fan and compressor rotor-stator interference broadband noise generation mechanism can be carried out, and technical support is provided for fan and compressor low-noise design.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to a fast prediction method for fan and compressor rotation-static interference broadband noise considering the influence of flow. Background technique [0002] The noise of fans and compressors is an important part of the noise of aeroengines. As the bypass ratio of modern turbofan engines increases, the proportion of noises from fans and compressors tends to increase. Therefore, the noise problems of fans and compressors are studied. It is particularly important to reduce the noise of aeroengines and even the overall noise of the aircraft. [0003] An important source of fan and compressor noise is rotational-static interference. When high-speed air flows through the high-speed rotating rotor, a series of vortex structures and turbulent flow structures will be generated. After acting on the lower stator, high-intensity discrete noise and broadband noise. With the deepening of research, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/00
CPCG06F30/20G06T17/00G06F2111/10G06F2113/08G06F2119/10Y02T90/00
Inventor 杨野王良锋杨党国邓吉龙周方奇刘俊高荣钊
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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