کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4992022 | 1457119 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Estimation of turbulence characteristics from PIV in a high-pressure fan-stirred constant volume combustion chamber
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کلمات کلیدی
Turbulent Characteristics Constant volume combustion bombLDVTDCRMSRPMPIVDFT - DFTHIT - اصابتProbability density function - تابع چگالی احتمالDiscrete Fourier transform - تبدیل فوریه گسستهrevolutions per minute - سرعت در هر دقیقهparticle imaging velocimetry - سرعت سنج تصویر ذراتHigh pressure - فشار بالاlaser doppler velocimetry - لیزر داپلر سرعت سنجtop dead center - مرکز مرده بالاroot mean square - میانگین مربع ریشهPdf - پی دی اف
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Estimation of turbulence characteristics from PIV in a high-pressure fan-stirred constant volume combustion chamber Estimation of turbulence characteristics from PIV in a high-pressure fan-stirred constant volume combustion chamber](/preview/png/4992022.png)
چکیده انگلیسی
In this paper, a systematic experimental study was conducted to clarify characteristics of turbulence field generated by two opposite fans in a cubic constant volume combustion bomb (CVCB). The effect of the fan speed (1000-2900Â rpm) and ambient pressure (0.1-3.0Â MPa) on root-mean-square fluctuations, probability density functions, integral length scales and energy spectra was investigated. To overcome the limitation of the 2D-PIV, three sheet velocity fields were measured to reconstruct the three-dimensional boundary of the homogeneous region. Experimental results showed that a nearly homogeneous turbulence field in a flat region around the center of the CVCB was generated while a slight departure from isotropy was unavoidable in the current configuration. The turbulence intensity was independent of the ambient pressure, but positively proportional to the fan speed. Absence of both fan speed and ambient pressure's effect was observed for the integral length scales. Analysis of the turbulent energy spectra implied that the increase of fan speed and ambient pressure resulted in a smaller critical eddy scale where the viscosity dissipation effect started emerging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 110, 5 January 2017, Pages 346-355
Journal: Applied Thermal Engineering - Volume 110, 5 January 2017, Pages 346-355
نویسندگان
Shijie Xu, Sheng Huang, Ronghua Huang, Wenming Wei, Xiaobei Cheng, Yinjie Ma, Yu Zhang,