کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
235447 465635 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three plugs model
ترجمه فارسی عنوان
مدل سه شاخه
کلمات کلیدی
انتقال پنوماتیک، رژیم پلاگین، مکانیک پلاگین افت فشار در پلاگین، ضریب انتقال استرس
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• The assumptions of previous models were briefly reviewed.
• A generalized model for different types of plugs has been developed.
• An overview of parametric analysis of the generalized plug model was presented.
• The mechanical properties of particulate media define at which type of plug the material will probably be conveyed.

This paper presents an investigation into pneumatic conveying mechanism of particulate plugs moving in horizontal pipes. A plug flow regime may exist in pneumatic conveying systems operating with high-pressure gradients and low gas velocities. The most significant advantages of transporting particulate materials in a plug form is low energy consumption, low particles attrition and low pipe erosion. However, due to inaccurate approximations of the required pressure gradient of the plug, these kind of conveying processes can lead to pipeline blockage. It is obvious that mechanical modeling of particulate plugs movement play a key role to assess pressure loss occurs in pneumatic conveying systems. The present study presents a fundamental physical model and targeted to provide complete information on the mechanics of plugs movement, while combines characteristics of three different types of plugs as they move inside vertical or horizontal pipes. By using the model, it is possible to compare the energy loses of different plug types at specific conveying conditions, and hence, to characterize the existence of possible type of plug shape. The present work provides a several examples for such kind of analysis. The results of the present work provide information to update major characteristic variables for pneumatic conveying systems operating in a plug flow mode. This will be useful for both the designers and for further research works.

Three plug types.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 283, October 2015, Pages 579–592
نویسندگان
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