کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9460522 | 1312181 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A numerical study of the aspiration efficiency of a thin-walled sampler facing the wind for high velocity ratios
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A numerical study of the aspiration efficiency of a thin-walled sampler facing the wind for high velocity ratios A numerical study of the aspiration efficiency of a thin-walled sampler facing the wind for high velocity ratios](/preview/png/9460522.png)
چکیده انگلیسی
A variety of operating conditions have been considered, in particular large values of the velocity ratio, R, which is equal to the ratio of the undisturbed free stream air velocity to the average sampling velocity. The situation of large R values is becoming increasingly important as samplers are developed with low flow rates. Previous experimental results have shown that the empirical model developed for sampling in moving air does not accurately predict the efficiency of samplers operating at these high values of R. The numerical results show that the aspiration efficiency for high R is not significantly affected by gravitational effects for the majority of cases of interest but it is dependent upon the magnitude of the reversal of the flow within the sampling tube.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Aerosol Science - Volume 36, Issue 1, January 2005, Pages 111-122
Journal: Journal of Aerosol Science - Volume 36, Issue 1, January 2005, Pages 111-122
نویسندگان
S.J. Dunnett,