کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4992138 1457118 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An investigation of in situ adaptive tabulation for premixed and nonpremixed combustion engine simulations with primary reference fuel mechanism
ترجمه فارسی عنوان
بررسی مقیاس سازگاری در محل برای شبیه سازی موتورهای احتراق پیش ساز و غیر قابل پیشگیری با استفاده از مکانیزم سوخت اولیه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The object of this work is to enhance the ISAT performance for transient combustion simulations for both premixed and non-premixed combustion process. In this work, dynamic pruning (DP) strategy for not-frequently-accessed tabulated points has been employed. For DP approach, the action considered when the table is full is to delete the most recently used leaf (at the tail of most recently used leaf) and replace it by the new entry in ISAT. The performances of ISAT with DP are presented firstly both in a homogenous charged compression ignition (HCCI) engine and a diesel engine. In present study, we investigate the sensitivity of ignition and composition inhomogeneity to heat loss/chemistry model for HCCI combustion. Composition inhomogeneity is governed by heat loss, turbulence diffusion and chemical reaction. Meanwhile, the effect of composition and temperature inhomogeneity on chemistry acceleration with ISAT-DP is studied in detail. It is shown that, ISAT-DP method can effectively reduce computational cost and achieve a large speedup factor of around 2 compared with original ISAT method. Memory size in ISAT has a tight influence on computational efficiency. And an overall speed up factor of around 4 for diesel engine is also achieved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 111, 25 January 2017, Pages 526-536
نویسندگان
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