Systemic solutions
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Automobile Industry
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Low Noise Solution For Intake And Exhaust Systems
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Interior Product Performance Optimization And Cost Reduction Solutions
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Low Noise Solution For Hydrogen Fuel Cell System
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Low Noise Solution For Vehicle Electric Drive System
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Low Noise Solution For Vehicle Air Conditioning System
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Vehicle Damping Layout Optimization And Lightweight Solutions
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Aviation Industry
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Material Industry
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Other Industry
In-cabin low noise solution for aviation environmental control system
1. Introduction to the background of noise in environmental control systems
· The main noise concerns are divided into two categories: inside the cabin and outside the cabin:
· Outside the cabin: Ramp Noise requirements for apron noise:
· ICAO ANNEX16 Appendix C and OEM overall aircraft level design requirements
· Inside the cabin: noise requirements inside the cabin;
· Electrical Motor noise in the drive assembly;
ICAO ANNEX Part 16 Appendix C Apron Noise (Ramp Noise) Requirements
ICAO ANNEX Part 16 Appendix C Apron Noise (Ramp Noise) Requirements
Aircraft cabin noise requirements:
Decomposed into environmental control system
Aircraft cabin noise requirements:
Decomposed into environmental control system
2. Source of noise in the cabin: low-pressure air distribution system
· Sound source 1: Refrigeration package system (including turbine noise and trim valve noise internally);
· Sound source 2: aerodynamic noise generated by the mixing cavity current limiting ring ;
· Sound source 3: aerodynamic noise caused by pulsation of pipelines/air supply ports;
· Sound source 4: Radiated noise caused by vibration of the fan casing.
3. BOACH environmental control system low noise solution:
2.1 Materials—>Components—>System-level engineering and technical services
· Material level:
· Customize mechanical and acoustic test benches and build a material database based on the materials used in low-pressure gas distribution pipelines;
· Component level:
· Carry out pipeline design, pressure loss assessment, acoustic design and performance testing based on low-pressure gas distribution pipeline configuration and muffler;
· System level:
· Carry out system-level performance evaluation in terms of fluids and acoustics based on system-level pipelines, and conduct energy matching tests in combination with customized test benches;
· On-machine verification: Provide customized noise reduction sample production and on-machine testing services for low-pressure gas distribution pipeline systems.
Material-level testing and customization services
Component level technical services
System-level piping design services
Installation level piping product verification
3.2 Development of customized analysis software and test bench:
· Customized software development:
· Used for rapid estimation in projects to obtain the noise level in the cabin under the preliminary layout plan;
· Set and decompose noise reduction indicators based on the noise level;
· Application cases:
· Currently, we have completed technical services, customized software development, and customized development of test benches for multiple models.
BOACH air conditioning piping system aerodynamic noise test bench
Aerodynamic noise test of buffer cavity system
Contact us
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Room 901, Building 1, Phase 2, Yungu Phase 2, Fengxi New Town, Xixian New District, Xixian New District, Xi'an City, Shaanxi Province
Room 307, Building 1, Harbin Institute of Technology Robot Industrial Park, No. 488 Qianjin East Road, Economic Development Zone, Kunshan City, Jiangsu Province
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