توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱A FULL MATHEMATICAL MODEL FOR STUDYING OF AN IMPINGING SPRAY JET UNDER QUIESCENT CONDITONS
نویسنده(ها): ، ،
اطلاعات انتشار: چهارمین همایش موتورهای درونسوز، سال
تعداد صفحات: ۱۹
The paper presents a complete mathematical model for isothermal free and wall jet in quiescent flow fields. This model is suitable for prediction of the spray jet penetration as a free or wall jet. Parametric studyng of the model shows that the computed results are important in prediction the effects of the key parameters such as fuel injection pressure, ambient air pressure and ambient air density on the jet development. In this model with assumption of a velocity distribution, which changes from unifirm profile at the nozzle exit to an assumed parabolic from at distance "x" from the pole, the developing jet envelop can be determined by using the continuity, and momentum equations. Finally, with simplified geometry of the combined free jet with its associated wall jet in a deflection region, the wall jet development can be obtained.
Comparison of the present model with other theoretical or experimental results shows a staisfactory agreement between them.<\div>

۲Assessment Of Using Solar Street Lights Installing On The MV Power Distribution Poles For Illumination Of Rural Roads: A Case Study Of Heyran Road In IRAN
نویسنده(ها): ، ،
اطلاعات انتشار: دومین همایش ملی انرژی های نو و پاک، سال
تعداد صفحات: ۱۷
Installing of street lights on the lighting poles of an electrical distribution grid is the most common way for supplying of road light. The initial cost of the common lighting projects contains the Installing cost of transformer supplied with the MV line, distribution grid and street lights .The utilization costs include energy consumption and energy losses of electrical lines and transformer. In the other hand applying of solar street lights (SSL) can supply the rural roads lighting in the lack of low voltage distribution lines without the energy consumption and electrical losses and more environmentally friendly. In order to evaluate the using of solar street lights, we have considered case study of Heyran road in the north of Iran. The result suggested that applying of solar street lights are more economical and gives a cost saving of 94 million Rials after 5 years of project implementation.<\div>
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