نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده هوافضا، پردیس علوم وفناوری نویین، دانشگاه سمنان
2 گروه آموزشی جلوبرندگی، دانشکده مهندسی هوافضا، دانشگاه سمنان، سمنان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Creating swirl flow in combustion chambers is a method to enhance combustion efficiency. One way to achieve this is through the use of a swirler, which generates rotational flow using angled blades. This rotational flow leads to better mixing and subsequently improves the combustion process. Researchers have explored various methods to increase the mixing of the flow passing through the swirler, with one of the most challenging and significant methods being changes in swirler geometry. Using a dual-stage swirler is a novel approach in swirler design. This paper examines the interaction between inner and outer swirlers, identifies recirculation zones, and studies changes in swirl number. The comparison between single-stage and dual-stage swirlers in this paper shows that a single-stage swirler creates a larger recirculation zone and higher swirl intensity, contributing to flame stability. Additionally, four new recirculation zones are formed after the dual-stage swirler, which also enhance flame stability. The use of a dual-stage swirler increases turbulent kinetic energy by up to 75% and turbulence intensity by up to 60%, resulting in better fuel-air mixing and achieving a uniform axial velocity distribution in a shorter distance from the combustion chamber.
کلیدواژهها [English]
)