کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8055571 1519908 2018 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of gas liquid ratio on the atomization characteristics of gas-liquid swirl coaxial injectors
ترجمه فارسی عنوان
اثرات نسبت مایع گاز به ویژگی های اتمیزاسیون انژکتورهای کواکسیال جریان گاز مایع
کلمات کلیدی
اتمسفر، ویژگی های اسپری، نسبت گاز و مایع، انژکتور کواکسیال سوپاپ گاز،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی
To understand the atomization characteristics and atomization mechanism of the gas-liquid swirl coaxial (GLSC) injector, a back-lighting photography technique has been employed to capture the instantaneous spray images with a high speed camera. The diameter and velocity of the droplets in the spray have been characterized with a Dantec Phase Doppler Anemometry (PDA) system. The effects of gas liquid ratio (GLR) on the spray pattern, Sauter mean diameter (SMD), diameter-velocity distribution and mass flow rate distribution were analyzed and discussed. The results show that the atomization of the GLSC injector is dominated by the film breakup when the GLR is small, and violent gas-liquid interaction when the GLR is large enough. The film breakup dominated spray can be divided into gas acceleration region and film breakup region while the violent gas-liquid interaction dominated spray can be divided into the gas acceleration region, violent gas-liquid interaction region and big droplets breakup region. The atomization characteristics of the GLSC injector is significantly influenced by the GLR. From the point of atomization performance, the increase of GLR has positive effects. It decreases the global Sauter mean diameter (GSMD) and varies the SMD distribution from a hollow cone shape (GLR = 0) to an inverted V shape, and finally slanted N shape. However, from the point of spatial distribution, the increase of GLR has negative effects, because the mass flow rate distribution becomes more nonuniform.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Astronautica - Volume 146, May 2018, Pages 24-32
نویسندگان
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