Business Introduction:

Letu Company is a professional service provider for NVH simulation and multi-physical field finite element analysis. The NVH simulation team is proficient in NVH simulation optimization in high-end manufacturing fields such as electrical machinery and appliances, power equipment, mechanical equipment, and automobiles, as well as in providing solutions for the standardized process of NVH simulation. It aims to improve the product development level for our clients, shorten the product development cycle, reduce product development costs, and enable them to take a leading position in the fierce product competition. Acoustic simulation is widely used in automobiles, consumer electronics, aerospace, energy, locomotives and rolling stock, shipbuilding, national defense and military industries, finance, retail, and so on.

Fan Noise Simulation Analysis and Optimization

Fans are widely used for ventilation and induced draft in factories, cooling towers, mines, boilers, etc. Generally, the noise of fans is mainly aerodynamic noise and air noise, and the noise level can be as high as over 100 decibels. This seriously exceeds the national "Hygienic Standards for the Design of Industrial Enterprises", and also seriously affects the physical and mental health of workers and reduces work efficiency. So, what are the methods for reducing fan noise? How can fan noise be reduced?

Case 1: Vacuum Cleaner Fan Noise Simulation Case

The following pictures show the animated CFD flow field analysis diagrams of the vacuum cleaner (CFD: Computational Fluid Dynamics).

The following picture shows the fan noise analysis process.

Case 2: Blender Fan Noise Simulation Case

Fans play an important role in heat dissipation in electronic products. In particular, the reliability requirements for electronic fans have doubled. Consumers cannot accept frequent fan replacements, and electronic fan suppliers cannot afford the increase in costs either, nor can they bear the dilemma of being eliminated in the market. Therefore, the design of electronic fans often undergoes preliminary development through simulation.

Case 3: Axial Flow Fan Noise Simulation

Case 4: Centrifugal Fan Noise Simulation

The main noise of axial flow fans and centrifugal fans comes from mechanical noise and motor noise. In this case, sound insulation enclosures or soundproof rooms can be selected to control the noise source in a closed space and prevent the noise from spreading outward. Meanwhile, in order to consider the ventilation and heat dissipation of the fans as well as maintenance issues, it is necessary to install mufflers at the air inlets and outlets and install maintenance doors.

Case 5: Vortex Fan Noise Simulation Case

What Are the Mainstream Acoustic Simulation Software?

COMSOL Multiphysics:

This is a general multi-physical field simulation software that includes an acoustic simulation module. It supports the modeling and solution of various acoustic problems, such as sound propagation, vibration, and noise control.

ANSYS:

This is a multi-physical field simulation software widely used in the engineering field that includes an acoustic simulation module. It can perform calculations such as sound field propagation, sound source analysis, and optimization of acoustic characteristics.

LMS Virtual.Lab:

This is software used for mechanical vibration and acoustic analysis. It supports multi-physical field coupling simulation. It can perform calculations such as sound field propagation, noise control, and sound source localization.

Abaqus:

This is a finite element analysis software widely used in engineering and scientific fields that includes an acoustic simulation module. It can perform calculations such as sound field propagation, sound source analysis, and optimization of acoustic characteristics.

CST Studio Suite:

This is an electromagnetic simulation software that includes an acoustic module. It can perform calculations such as sound field propagation, sound source analysis, and optimization of acoustic characteristics.