کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
708380 1461097 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Online continuous measurement of the size distribution of pneumatically conveyed particles by acoustic emission methods
ترجمه فارسی عنوان
اندازه گیری های پیوسته در حال حاضر از توزیع اندازه ذرات منتقل شده توسط پنوماتیک توسط روش انتشار آکوستیک
کلمات کلیدی
جریان ذرات، اندازه گیری ذرات بر روی خط، انتشار آکوستیک، تئوری تماس هرتز
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
چکیده انگلیسی


• An acoustic emission signal is used for online sizing of particles in motion.
• The particle size is inferred from the peak magnitude of the signal.
• Particle velocity is obtained from an electrostatic velocimetry system.
• A prototype system was evaluated on a laboratory-scale particle flow test rig.

The particle size distribution of pulverized fuel in pneumatic conveying pipelines is an important physical characteristic closely related to mill energy economy, fuel flow property, combustion efficiency and pollutant emissions. In order to determine the size distribution of pneumatically conveyed fuel particles on an online continuous basis, an instrumentation system based on acoustic emission (AE) method is developed. This method extracts information about particle size distribution from the impulsive AE signals generated by the impacts of particles with a metallic waveguide introduced into the particle flow. Analytical modeling of the particle impact is performed in order to establish the relationship between the particle size and the peak AE voltage. With the particle velocity obtained from an electrostatic velocimetry system and the pulse magnitude determined using a peak detection algorithm, the particle size is computed directly using the developed model. Experimental results obtained with glass beads on a laboratory-scale particle flow test rig demonstrate that the system is capable of discriminating particles of different sizes from the AE signals. The system has several appealing features such as online continuous measurement, high sensitivity, simple sensor structure and low cost, which make it well suited for industrial applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flow Measurement and Instrumentation - Volume 40, December 2014, Pages 163–168
نویسندگان
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