This study performs a linear mean field analysis of turbulent reacting methane-air jet flame, with the goal predicting response flow to upstream acoustic actuation. Unlike previous studies, this work develops and applies an active flame approach by taking heat release oscillations resulting from fluctuations into account. For in analysis, linearized combustion model is necessary. Linearizing La...

هدف: این تحقیق با هدف ارائه مدلی برای ارتقای صلاحیت‌های حرفه‌ای مشاوران آموزشی در خدمات به دانش‌آموزان مقطع متوسطه اول انجام شد.مواد و روش‌ها: روش پژوهش حاضر، توصیفی از نوع اکتشافی حیث رویکرد، ترکیبی (کیفی-کمی) بود. بدو کار بخش کیفی مبتنی بر اجرای مصاحبه‌های صورت نیمه‌ساختاریافته خبرگان، ابعاد مؤلفه‌ها شناسایی کمی بهره‌گیری پرسشنامه، نسبت جمع‌آوری داده‌ها اقدام شد. مشارکت‌کنندگان 14 خبره حوزه م...

This article examines the increasingly crucial role played by Computational Fluid Dynamics (CFD) in the analysis, design, certification, and support of aerospace products. The status of CFD is described, and we identify opportunities for CFD to have a more substantial impact. The challenges facing CFD are also discussed, primarily in terms of numerical solution, computing power, and physical mo...

The availability of reliable and efficient turbulent flow simulation methods is highly beneficial for wind energy aerospace developments. However, existing suffer from significant shortcomings. In particular, the most promising (hybrid RANS-LES methods) face divergent developments over decades, there a waste resources opportunities. It very likely that this development will continue as long lit...

With the ever rising need for better fuel efficiency and lower emissions, the development of better engine technology is essential. Different strategies are being considered to increase engine efficiency, such as direct injection or downsizing. Certain regimes are clearly identified as optimal for certain range of loads. For gasoline engines, the Homogeneous Charge Compression Ignition (HCCI) c...

Particle dispersion in a periodic channel is studied using the elliptic relaxation hybrid RANS/LES (ER-HRL) model. This approach employs four-equation linear eddy viscosity (LEV) model while Reynolds Averaged Navier-Stokes (RANS) mode near wall, and switches to LES Smagorinsky dynamic outer flow region. We perform systematic analysis of six sets particles having Stokes numbers St = 0.2, 1, 5, 1...