摘要
呼吸机的噪声问题一直是呼吸机发展至今重点研究的课题。众多资料表明,在呼吸机的噪声控制上,国内与国外先进水平相比仍有较大差距。本文与上海医疗设备股份有限公司合作,应用专业的计算流体动力学(CFD)软件FLUENT,选取标准k-ε湍流方程模型和SIMPLE算法,对家用持续气道正压(CPAP)呼吸机的压力发生器内部流场进行数值模拟,并对模拟结果进行分析讨论。结果表明,该CPAP呼吸机压力发生器蜗壳部分有局部回流现象,叶轮部分流场速度出现局部不均匀,叶轮进口处存在局部负压,易导致噪声产生,影响整机性能,因此其设计有待改进。
The problem of noise in ventilator has always been an important topic to study in the development of the ventilator. A great number of data are showing that there are still large gaps of research and application levels in noise control of the ventilator between China and some more advanced foreign countries. In this study, with cooperation of the Shanghai Medical Equipment Limited Liability Company, we used the computational fluid dynamics （CFD）, software FLUENT, adopted the standard k-ε turbulence model and the SIMPLE algorithm to simulate the inner flow field of the continuous positive airway pressure （CPAP） ventilator＇s pressure generator. After a detailed analysis, we figured out that there are several deficiencies in this ventilator, like local reflow in volute, uneven velocity distribution and local negative pressure in inlet of the impeller, which easily lead to noise and affect the ventilator＇ s performances. So, it needs to be improved to a certain extent.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2011年第6期1131-1135,共5页
Journal of Biomedical Engineering
基金
国家自然科学基金资助项目(50976071)
关键词
计算流体动力学
持续气道正压呼吸机
压力发生器
数值模拟
噪声
Computational fluid dynamics （CFD）
Continuous positive airway pressure （CPAP） ventilator
Pressure generator
Numerical simulation
Noise
