中文摘要：

大型民用客机座舱空气中的颗粒污染物直接影响乘客健康和安全,需要采用有效的气溶胶检测系统及时发现空气品质的好坏,光散射式颗粒计数器是常用的检测设备.在光散射气溶胶颗粒粒径和计数浓度测量方法中,测量结果一般受被测粒子折射率影响.为了提高对客机座舱环境气溶胶粒径的测量精度,根据Mie理论和光通量计算公式,对大气中5种常见气溶胶粒子——水、硫酸、硫酸铵、炭黑和金属以及标准粒子聚苯乙烯（PSL）粒子,在不同接收方向角θ和接收孔径半角β值下的散射光通量F与粒径D关系曲线（F-D曲线）进行了全面系统的计算模拟,并模拟采用PSL标准粒子标定,计算并比较了3种接收参数下粒径模拟测量结果与理论值的误差情况.通过对大量模拟结果的比较分析,发现θ为40°和β为45°的接收参数下,5种粒子的F-D曲线较为接近且单调性较好,表明折射率对5种粒子测量结果的影响都较小.

英文摘要：

Particle pollutants in the aircraft cabin directly endanger people＇s health, so the effective aerosol meas- urement system is required to monitor air quality timely. The light scattering particle counter is a common testing in- strument. Particle refractive index has an effect on the measurement result of aerosol particle size and particle number concentration by the method of light scattering. In order to improve the measurement accuracy of the aerosol particle size in the aircraft cabin environment, the relationship curves between scattered light flux F and particle size D （F-D curves） of five common aerosol particles and the standard particle polystyrene （PSL） are simulated systematically, based on the Mie theory and flux calculation formula. Five common aerosol particles including water, sulfuric acid, ammonium sulfate, carbon black and metal and their F-D curves are simulated systematically with different reception direction angles 0 and reception aperture half-angle fl values. Relative errors are compared in three groups of reception parameters between the theoretical and simulated measurement values of particles＇ diameter, which are calibrated by PSL standard particles. The results show that F-D curves of the five kinds of particles are closer and have better monotonicity with θ of 40° and β of 45°, based on a large number of the simulated results of comparative analysis and indicate that particle refractive index has less influence on measurement result of the five kinds of particles in this reception parameter.