کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
789413 1466425 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental and numerical investigation of the effect of shock wave characteristics on the ejector performance
ترجمه فارسی عنوان
بررسی تجربی و عددی اثر تأثیرات ویژگی های موج شکن بر عملکرد اجکتور
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• The shock wave structures are captured by the optical Schlieren measurements.
• The RNG k-ε model agrees best with measurements.
• The expansion waves do not reach the mixing chamber wall at the sub-critical mode.
• Reducing the shock wave wavelength will improve the ejector performance.

The entrainment performance and the shock wave structures in a three-dimensional ejector were investigated by Computational Fluid Dynamics (CFD) and Schlieren flow visualization. The ejector performance was evaluated based on the mass flow rates of the primary and secondary flows. The shock wave structures in the ejector mixing chamber were captured by the optical Schlieren measurements. The results show that the expansion waves in the shock train do not reach the mixing chamber wall when the ejector is working at the sub-critical mode. Decreasing of the shock wave wavelength increases the secondary mass flow rate. A three-dimensional CFD model with four turbulence models was then compared with the experimental data. The results show that the RNG k-ε model agrees best with measurements for predictions of both the mass flow rate and shock wave structures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 40, April 2014, Pages 31–42
نویسندگان
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