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1)  three-component PDA system
三维PDA
1.
Profiles of air and particles velocities, particle concentration and particle diameter with a GS central bafle swirl burners had been measured with a three-component PDA system in a gas-particle two phase test facility, in contrast, so did a common baffle swirl burner.
2实验方法及结果分析试验采用三维激光粒子动态分析仪(简称三维PDA),实验台系统主要由送风机、吸风机、给粉机、燃烧器模型、试验段、旋风分离器等组成,试验段为一竖直放置的筒体,直径为4800mm,燃烧器模型安装在简体上部中心位置,最外层扩口端部与筒体内壁平齐,沿射流流动方向筒体高度为1800mm,详见文献[2;3],有两台给粉机,一台将白粉送入一、二次风中,给粉量为0。
2)  PDA 3D piping design
PDA三维配管
3)  three dimensional particle dynamic analyzer
三维颗粒动态分析仪(3D-PDA)
4)  three dimensional Doppler particle analyzer (PDA)
三维相位多普勒颗粒分析仪(PDA)
5)  Personal digital assistant
PDA
1.
The Research and Application of Mobile Geographic Information System Based on Personal Digital Assistant Group;
基于PDA群的移动GIS研究与应用
2.
With the maturity of techniques in both personal digital assistant (PDA), wireless local area networks (WLAN) and the increasingly lower cost o.
随着个人数字助理(PDA)和无线局域网(WLAN)技术、产品日益成熟和硬件价格降低,PDA和WLAN己倍受各行业青睐,为开发移动体检信息系统创造了条件。
6)  particle dynamic analyzer
PDA
1.
With the help of a particle dynamic analyzer (PDA) system an experimental and an alytical study of the turbulent flow characteristics has been conducted of the i n furnace coherent structure in a tangentially fired furnace under a vertical b i as pulverized coal combustion mode.
采用PDA测量系统 ,对四角切圆锅炉中垂直浓淡煤粉燃烧方式下影响一次风与主流场混合和扩散的炉内拟序结构进行了实验研究和湍流特性分析。
2.
With respect to the above cited issues an experimental study was conducted of the gas solid dual phase flow characteristics of the Tangential firing system (CFS I) and the reverse tangenfial firing system (CFS II) with the help of PDA (particle dynamic analyzer) system.
针对切向燃烧锅炉燃用劣质煤时的稳燃及水冷壁高温腐蚀等问题 ,采用PDA测量系统 ,对四角切圆锅炉中一、二次风同心反切和同心同向燃烧方式进行了气固两相流动特性的实验研究。
补充资料:PDA
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性质:由减压渣油通过丙烷脱沥青工艺而制得的沥青。渣油通过丙烷两段沉降脱沥青工艺生产的脱油沥青,其延度可达100cm,针入度581/10mm,软化点49℃。可直接作为道路沥青或作为调合其他沥青产品的组分。也可经氧化工艺生产建筑沥青。丙烷沥青中的硬沥青部分,经乳化后可作为燃料使用。

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