• spatially-resolved heat transfer characteristics in channels with pin fin and pin fin-dimple arrays

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 570
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     a comparative study has been conducted to investigate the spatially-resolved heat transfer characteristics of air turbulent flow in rectangular channels with pin fin and pin fin-dimple arrays. a combined method of experiments and numerical computation was adopted to obtain the spatially-resolved nusselt numbers on the endwall surface of the pin fin and pin fin-dimple channels. compared with the pin fin channel, the pin fin-dimple channel shows distinctive local heat transfer characteristics on the endwall beneath the main flow and the wake flow region. due to the presence of the dimples in the pin fin arrays, extra strong vortex flows are generated near the wall beneath the main flow region downstream the dimples, which distinctively increase the turbulent mixing there and enhance the heat transfer rates; however the turbulent mixing in the wake of the pin fins is reduced appreciably, which leads to decreased heat transfer rates in the wake especially at relatively low reynolds number. overall, the dimples in the pin fin arrays increase not only the averaged heat transfer coefficient, but also the heat transfer area on the endwall.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها
مقالات جدیدترین ژورنال ها