کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
270148 504732 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Laminar smoke points of coflowing flames in microgravity
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Laminar smoke points of coflowing flames in microgravity
چکیده انگلیسی

Laminar smoke points were measured in nonbuoyant laminar jet diffusion flames in coflowing air. Microgravity was obtained on board the International Space Station. A total of 55 smoke points were found for ethylene, propane, propylene, and propylene/nitrogen mixtures. Burner diameters were 0.41, 0.76, and 1.6 mm, and coflow velocities varied from 5.4 to 65 cm/s. These flames allow extensive control over residence time via variations in dilution, burner diameter, and coflow velocity. The measured smoke-point lengths scaled with d−0.91uair0.41, where d is burner diameter and uair is coflow velocity. The measurements yielded estimates of sooting propensities of the present fuels in microgravity diffusion flames. Analytical models of residence times in gas jet flames are presented, and although residence time helps explain many of the observed trends it does not correlate the measured smoke points.


► Laminar smoke points were measured on board the International Space Station.
► These flames allow extensive control over residence time via variations in dilution, burner diameter, and coflow velocity.
► The measured smoke-point lengths scaled with d–0.91uair0.41, where d is burner diameter and uair is coflow velocity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fire Safety Journal - Volume 46, Issue 8, November 2011, Pages 550–555
نویسندگان
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