Connecting with the improved process of the wall mounted air-conditioner manufacturing,the article analyzes the blade passing frequency noise and the vortex noise of the cross-flow fan.
结合挂壁式空调制造工艺改进实践,分析了贯流风机旋转噪声和涡流噪声产生原因,并通过噪声品质分析、参数优化设计等试验研究,提出了选择合理的技术参数、进行蒸发器风道、叶轮等工艺结构改进等降低噪声的技术措施,实现了较为理想的降噪效果。
The vortex shedding noise model for the fan and the model for the blade tail-edge vortex noise induced by the interaction between the air flow and the k th section have been developed.
通过将掠形叶片沿径向分为N个叶元体，推导了第k叶元体与气流相互作用诱发的叶元体尾缘涡流噪声模型与轴流风机的涡流脱落声学模型，通过实验验证了理论模型的正确性，并分析了叶轮结构参数与涡流脱落噪声的关系。
Theoretical Modeling and Simulation Research on Hydraulic Noises Control for Certain Ship Steering System;
某船舶操舵系统液压噪声控制的理论建模与仿真研究
Investigation into the Cavitation Noise in Grooves of Spool Valve;
液压阀芯节流槽气穴噪声特性的研究
The Application of Numeric Analysis Method in the Noise Prodiction of Hydraulic Control System in Airo
数值分析法在飞机液压系统噪声分析中的应用
Analysis and Control of Impact Noise of Hydraulic Pile Drivers
液压打桩锤冲击噪声的分析及其控制方法
CFD Simulation of Noise Characteristic of Coaxial Hydraulic Relief Valve with Three Stages
三级同心液压溢流阀噪声特性的CFD分析
Statistical analysis and experimental investigation method of the noise of hydraulic pump
液压泵噪声的统计分析和试验研究方法
Analysis of an Integrated Realizable Low-Phase Noise VCO
低噪声集成压控振荡器噪声性能分析
low noise air screw compressor
低噪声螺杆空气压缩机
Impact of Transformer Noise on Indoor Residential Environment and Control Techniques
变压器噪声对居民室内噪声影响分析和控制
Indentifying and suppression of low frequency noise from the rotary compressor
旋转压缩机低频噪声源识别及噪声抑制
Analysis of Relationship between Compressor Noise Vibration and Outdoor Unit Noise of Air-Conditioners
压缩机噪声振动与空调外机噪声关系分析
Noise Reduction of High-pressure Common-rail Engine and the Impact of Engine Performances on the Noise
高压共轨发动机降噪及其性能对噪声的影响
he shouted above the noise of the engine.
他的喊声压倒了发动机的噪音。
EXPERIMENTAL STUDY ON NOISE HEARING DAMAGE BY HYPERBARIC OXYGEN THERAPY
高压氧治疗噪声性听损的实验研究
The square voltage was used to describe thermal noise voltage in determination.
热噪声电压通常采用均方值定量描述。
Identifying Research on Noise Sources of Rotary Vane Compressor
旋叶式汽车空调压缩机的噪声源识别
To drain continuously with low noise,without being affected by the fluctuation of the pressure.
不受压力波动的影响，连续排水，噪声小。
Research and Development of Online Noise Monitoring System for Processors;
压缩机噪声在线监测系统的开发研究