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Calculation method for electric aircraft propeller noise

A technology of electric aircraft and calculation method, which is applied in calculation, computer-aided design, electric digital data processing, etc., and can solve problems affecting the ride comfort of the driver and passengers, impact on flight safety, impact on the environment, etc.

Active Publication Date: 2017-08-18
SHENYANG AEROSPACE UNIVERSITY
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AI Technical Summary

Problems solved by technology

Propeller noise will not only affect the environment in the area where the airport is located, but also affect the comfort of the driver and passengers when the propeller noise is transmitted to the cabin; the acoustic fatigue and structural vibration induced by excessive propeller noise have a great impact on flight safety

Method used

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  • Calculation method for electric aircraft propeller noise
  • Calculation method for electric aircraft propeller noise
  • Calculation method for electric aircraft propeller noise

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Embodiment Construction

[0032] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] A calculation method for electric aircraft propeller noise, such as figure 1 shown, including the following steps:

[0034] Step 1: Establish a three-dimensional geometric model of the propeller according to the structural parameters of the electric aircraft propeller.

[0035] In this embodiment, the structural parameters of the electric aircraft propeller include: number of propeller blades, propeller diameter, propeller pitch, pitch ratio, disk surface ratio, hub diameter ratio and blade type value.

[0036] Number of propeller blades n=2, propeller diameter D=1.6m, hub radius Rh=0.06m, rated speed N=1500r / min.

[0037] The three-dimensional geometric model of the propeller obtained in this embodiment is as follows: figure 2 shown.

[0038] Step 2: Use the finite element method to mesh the flow field area of ​​the three-dime...

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Abstract

The invention puts forward a calculation method for electric aircraft propeller noise. The method comprises the following steps that: according to the structure parameter of an electric aircraft propeller, establishing a three-dimensional geometric model of the propeller; adopting a finite element method to carry out mesh generation on the flow field area of the three-dimensional geometric model of the propeller to obtain a propeller flow field subjected to the mesh generation; adopting a large eddy simulation calculation model to carry out unsteady pressure pulsation solving on the circulation area of the propeller flow field subjected to the mesh generation to obtain the transient pressure distribution of a paddle surface; and adopting an acoustic boundary element method to carry out acoustic field simulation on an acoustic mesh model to obtain the radiation noise distribution of the propeller. The method comprehensively considers each influence factor of noise, and therefore, a calculation result is accurate and reliable. The method can be used for aerodynamic noise frequency domain analysis and the like, and a theoretical basis and technical guidance are provided for effectively lowering the propeller noise.

Description

technical field [0001] The invention belongs to the technical field of propeller aerodynamic noise analysis and control, and in particular relates to a calculation method for electric aircraft propeller noise. Background technique [0002] The noise of electric aircraft mainly comes from the propeller. Propeller noise will not only affect the environment in the area where the airport is located, but also affect the comfort of the driver and passengers when the propeller noise is transmitted to the cabin; the acoustic fatigue and structural vibration induced by excessive propeller noise have a great impact on flight safety. Propeller noise mainly comes from aerodynamic noise. Studying propeller noise from the perspective of noise generation mechanism can not only predict its noise value in the preliminary design stage of the propeller, but also provide theoretical basis and technical guidance for effectively reducing propeller noise. Contents of the invention [0003] Aimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23G06F2119/10Y02T90/00
Inventor 艾延廷王志田晶王腾飞王泽
Owner SHENYANG AEROSPACE UNIVERSITY
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