Research on airliner cabin air filter performance
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Research on airliner cabin air filter performance 大型客机座舱空气过滤器性能研究 PowerPoint PPT Presentation


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Research on airliner cabin air filter performance 大型客机座舱空气过滤器性能研究. Junjie Liu Tianjin University. 概述 Outline. 研究背景 Background 飞机乘员健康的需要 The health of crew and passengers 国家发展战略的需要 The national development strategy 研究方法 Research methods 检测系统的搭建 The test rig building

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Research on airliner cabin air filter performance 大型客机座舱空气过滤器性能研究

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Research on airliner cabin air filter performance

Research on airliner cabin air filter performance大型客机座舱空气过滤器性能研究

Junjie Liu

Tianjin University


Outline

概述Outline

研究背景Background

  • 飞机乘员健康的需要The health of crew and passengers

  • 国家发展战略的需要The national development strategy

  • 研究方法Research methods

  • 检测系统的搭建The test rig building

  • 主要设备的选择The main equipment

  • 机舱过滤器机舱过滤器检测系统的标定Qualification of the test rig

  • 研究结果Research results and discussion

  • 不同风量下的效率Particle filtration efficiencies as a function of particle size for various airflow rates

  • 压降和风量的关系Pressure drop across the cabin filter as a function of airflow rate

  • 容尘对效率、压降的影响。The influence of dust load on the performance of the airliner cabin air filter

  • 展望outlook


Background the health of crew and passengers

研究背景-乘客健康的需要Background-The health of crew and passengers

SARS in 2003:8096 catch,774 death

H1N1 in 2009:14286 death

a typical case :in 2003,22 catch SARS on a airplane from HK to Beijing


Background the health of crew and passengers1

研究背景-乘客健康的需要Background- The health of crew and passengers

Concentration(p/cc)

road

housing estate

indoor

airport

diameter

Nano-particle concentration higher than other place

deposition

超细颗粒危害大

total

upstream

downstream

upper airways

bronchus

lung

(姚,2008)

Nano-particle can enter lung and flood


Background the national development strategy

研究背景-国家发展战略的需要Background- The national development strategy

New demand

Replace the existing

keep on or retire

  • 国内空白gap :

  • 没有自己知识产权的航空滤料material

  • 没有相关的评价方法evaluationmethodology

  • 没有自己的过滤器适航标准airworthiness standard


Background technique difficulty

研究背景-技术瓶颈Background-technique difficulty

  • 过滤材料material

    容尘量Dusting-holding Capacity

    防火阻燃要求fire prevention

    大滤速high filtration velocity

  • 过滤器结构structure

    抗震bear shock

  • 评价方法evaluationmethodology

    用什么方法来评价航空过滤器evaluationmethodology for airliner cabin air filter


Research methods

研究方法Research methods

  • 检测系统的搭建The test rig building

  • 主要设备选择The main equipment

  • 速度与气溶胶均匀性的标定air velocity uniformity and aerosol uniformity

  • 0效率与100%效率试验0% efficiency test and 100% 0efficiency test

  • 稀释器的标定dilution factors


Research methods the test rig building

研究方法Research methods检测系统的搭建The test rig building

1.高效过滤器2.发尘口3.温湿度传感器4.上游采样口5.检查窗6.支架7.压差传感器8.均流板9.被测过滤器10.管道11.滑轨支架12.下游采样口13.检查窗14.压差传感器15.均流板16.喷嘴流量计17.风机18.软连接19.滑轨20.地面


Research methods the main equipment

研究方法Research methods主要设备The main equipment

Particle counters

Air velocity meter and manometer

仪器经标定后均满足标准要求

Particle generator

AC generator

DMA:8-1000nm


Research methods the diameter distribution

研究方法Research methods发尘器粒径分布The diameter distribution


Research methods air velocity uniformity and aerosol uniformity

研究方法Research methods速度与气溶胶均匀性的标定air velocity uniformity and aerosol uniformity

✈EN779:velocity uniformity<10%

✈EN779:concentration uniformity<15%

✈颗粒越大波动性越强,均匀性越差larger diameter lead to worse uniformity

✈EN779要求风速均匀性的偏差系数<10%

✈EN779要求浓度均匀性的偏差系数<15%

✈颗粒越大波动性越强,均匀性越差


Research methods 0 100 0 efficiency test and 100 0efficiency test

研究方法Research methods0效率与100%效率试验0% efficiency test and 100% 0efficiency test

Aerosol stable

0% efficiency test

efficiency

C

t

✈ EN779: 0% efficiency test :

d>1μm,±3%

d<μm,±7%

✈ EN779: 100% efficiency test :

>99%

100% 0efficiency test

efficiency

d


Research methods dilution factors

研究方法Research methods稀释器的标定dilution factors

The principle of the dilution


Research on airliner cabin air filter performance

研究结果Research results and discussion不同风量下的效率Particle filtration efficiencies as a function of particle size for various airflow rates

Larger flow lead lower η

Airflow rate affect UFP

concentration in cabin

F7

η demonstrated a “U” shape.

MPPS decrease with the increase of airflow.

MPPS occur at 150nm for filter A,and 55 for B

H11


Research on airliner cabin air filter performance

研究结果Research results and discussion效率和风量的关系The relationship between filtration efficiency and airflow rate for different particle diameter ranges

效率随风量增大而减小For both the filters, the filtration efficiency all reduce with the increase of airflow rate

MPPS粒径范围内减小最快the greatest filtration efficiency reduction occurred at the MPPS range (100-250 nm for Filter A; <100 nm for Filter B)


Research results and discussion pressure drop across the cabin filter as a function of airflow rate

研究结果Research results and discussion压降和风量的关系Pressure drop across the cabin filter as a function of airflow rate

压降随风量增大而增大The ΔP increases in response to the increased airflow rate for both of the test filters.

As the airflow rate increases from 1000 to 2200 m3 h-1, the increases of ΔP across Filter A and B were 100 Pa and 250 Pa, respectively.

大风量有利于舱内气流组织,但能耗大Larger Q is good for the air distribution in the cabin, while the energy consumption is larger.


Research on airliner cabin air filter performance

研究结果Research results and discussion使用时间与容尘量的关系Estimated filter usage as a function of loaded dust mass under various in-cabin particle concentrations

估计不同舱内浓度水平下使用时间与容尘量的关系。Estimated filter usage as a function of loaded dust mass under various in-cabin particle concentrations

使用时间与容尘的量成正比the estimated filter usage is proportional to the mass of loaded dust

实验容尘与实际情况有一定的差异the particle loading on the filter is faster than the slow dust loading characteristic under the typical flying condition

差异的评估Estimate the difference


Research results and discussion filtration efficiencies for different dust load levels

研究结果Research results and discussion不同容尘阶段的效率Filtration efficiencies for different dust load levels

容尘的量越大,效率越高

As the filter was loaded more dust, the filtration efficiency increase.

在MPPS处,效率上升最快

the largest increases observed at the MPPS

850g以下,线性变化;850g以上剧烈变化

the filtration efficiency increases linearly as the loaded dust mass rises until 850 g; As the dust load increased from 850 g to 1000 g, the filtration efficiency increased more rapidly.


Research on airliner cabin air filter performance

研究结果Research results and discussion压降与容尘的量的关系Pressure drop across the cabin filter as a function of loaded dust mass on the filter

容尘的量越大,压降越大。容1000g尘,压降增大8倍。

The pressure drop increases approximately 8 times more (~100 Pa to 800 Pa) as 1000 g dust was loaded on the filter.

曲线斜率变大:越容尘,压降增大越快。

as the filter was loaded more dust, the pressure drop increases more rapidly


Research on airliner cabin air filter performance

研究结果Research results and discussion效率、压降与容尘的量的关系Total filtration efficiencies and pressure drops as a function of filter usage time

使用时间越长,效率越高,压降越大。

Both filtration efficiency and pressure drop show a more rapid increase when the filter is used longer.

舱内浓度越低,效率、压降变化越平缓。达到同样的压降,使用时间越长。The lower cabin concentration, the efficiency and pressure drop change more Gentle


Outlook

展望outlook

  • 容尘达到多少时,过滤器不能继续使用。How much dust the filter load,it’s performance became worse

  • 在机舱内一定颗粒物浓度水平下,航空过滤器容尘量指标如何才能满足使用要求。under a in-cabin particle concentrations, the dusting-holding capacity can meets the needs.

  • 如何在航空过滤器体积、重量有限制,且在大滤速过滤条件下,过滤器能够满足性能要求。How can the filter performance well when the volume and Weight are limited and the filtration velocity is high.

  • 材料如何满足防火阻燃、大滤速要求how can the Material meets the needs of fire prevention and high filtration velocity

  • 过滤器结构怎样才能实现抗震how can the filter structure bear shock

  • 航空过滤器评价方法上如何改进。The improvement of evaluation methodology for airliner cabin air filter


The end

The end!

Thanks for your attention!


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