منابع مشابه
Numerical Study of Buoyancy Effects on Triple Flames
The structure and propagation properties of triple flames subject to buoyancy effects are studied numerically using a high accuracy scheme. A wide range of gravity conditions, heat release, and mixing widths for a scalar mixing layer are computed for ’upright’ and ’inverted’ triple flames (i.e, gravity pointed in parallel and in opposite directions of flame propagation). These results are used ...
متن کاملSpatially resolved heat release rate measurements in turbulent premixed flames
Heat release rate is a fundamental property of great importance for the theoretical and experimental elucidation of unsteady flame behaviors such as combustion noise, combustion instabilities, and pulsed combustion. Investigations of such thermoacoustic interactions require a reliable indicator of heat release rate capable of resolving spatial structures in turbulent flames. Traditionally, heat...
متن کاملthe effects of error correction methods on pronunciation accuracy
هدف از انجام این تحقیق مشخص کردن موثرترین متد اصلاح خطا بر روی دقت آهنگ و تاکید تلفظ کلمه در زبان انگلیسی بود. این تحقیق با پیاده کردن چهار متد ارائه اصلاح خطا در چهار گروه، سه گروه آزمایشی و یک گروه تحت کنترل، انجام شد که گروه های فوق الذکر شامل دانشجویان سطح بالای متوسط کتاب اول passages بودند. گروه اول شامل 15، دوم 14، سوم 15 و آخرین 16 دانشجو بودند. دوره مربوطه به مدت 10 هفته ادامه یافت و د...
15 صفحه اولOn the space-time correlation of heat release rate in turbulent premixed flames
The spectral characteristics of combustion noise is dictated by the temporal correlation of the heat release rate fluctuation. This paper investigates the two-point space-time correlation of heat release rate fluctuations by analysing recent direct numerical simulation (DNS) data of turbulent premixed flames. The results show that this correlation decays rapidly in both space and time due to th...
متن کاملEffects of H2 enrichment on the propagation characteristics of CH4–air triple flames
The effects of H2 enrichment on the propagation of laminar CH4–air triple flames in axisymmetric coflowing jets are numerically investigated. A comprehensive, time-dependent computational model, which employs a detailed description of chemistry and transport, is used to simulate the transient ignition and flame propagation phenomena. Flames are ignited in a jet-mixing layer far downstream of th...
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 1995
ISSN: 1070-6631,1089-7666
DOI: 10.1063/1.868531