کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6973274 1453272 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Safety-related conclusions for the application of ultrasound in explosive atmospheres
ترجمه فارسی عنوان
نتایج مربوط به ایمنی برای استفاده از سونوگرافی در محیط های انفجاری
کلمات کلیدی
آتش گرفتن، انفجار، کاویتاسیون، زمینه های مستطیلی ایستاده، سونوگرافی با شدت بالا،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی
International safety regulations such as EN 1127-1 consider ultrasound to be an ignition source. Currently, applications of ultrasound in explosive atmospheres have to comply with a threshold value of 1 mW/mm2. However, it is unclear as to how this intensity has to be measured and, therefore, this threshold value is poorly defined. Moreover, it is based on theoretical estimations in analogy to other ignition sources and there are no publications or significant records on these estimations. Within a research project at PTB, it has now been investigated experimentally in relation to worst-case considerations including airborne ultrasound, focused MHz ultrasound in liquids and acoustic cavitation. On the basis of the results of the research it is now possible to revise the current regulations and to specify measures for safe operation of ultrasonic applications in explosive atmospheres. In this context, for ultrasound coupled directly to gaseous atmospheres a new threshold value of 170 dB (re. 20 μPa) can be suggested, and for ultrasonic applications in liquids, an augmentation can be made to the threshold to 400 mW/mm2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Loss Prevention in the Process Industries - Volume 36, July 2015, Pages 522-531
نویسندگان
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