بررسی تاثیر دوران یک تیغه قائم در افزایش انتقال گرما از یک صفحه مسطح

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجو، گروه مهندسی مکانیک، دانشگاه محقق اردبیلی، اردبیل، ایران

2 استاد، گروه مهندسی مکانیک، دانشگاه محقق اردبیلی، اردبیل، ایران

3 استادیار، گروه مهندسی مکانیک، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

در تحقیق حاضر به بررسی افزایش انتقال گرمای همرفتی از یک صفحه مسطح که در آن یک تیغه نازک با سرعت معینی در مجاورت صفحه در حال دوران است پرداخته شده است. برای انجام این پژوهش عددی از روش حجم محدود با تعریف مش لغزنده و مرز رابط به منظور لحاظ نمودن حرکت دورانی تیغه در درون دامنه‌ی محاسباتی استفاده شده­­است. معادلات بقای جرم، اندازه حرکت و انرژی به صورت دوبعدی و گذرا برای جریان هوا با خصوصیات فیزیکی ثابت توسط نرم افزار Fluent حل شده و جزئیات میدان­های جریان و دما ایجاد شده در قسمت بالای صفحه استخراج شده است. عدد رینولدز دورانی تیغه در محدوده 5460 – 1365 تغییر داده شده و پارامتر بی بعد فاصله قائم انتهای تیغه از صفحه به طول تیغه(d/D)  در محدوده 420/0 – 105/0 مورد بررسی قرار گرفته است. نتایج نشانگر بهبود انتقال گرما با افزایش سرعت دورانی تیغه مخصوصا در سمت مقابل تیغه بوده در حالی که تاثیر پارامتر d/D تنها در ناحیه محدودی از مرکز صفحه محسوس بوده و با افزایش آن عدد ناسلت محلی در آن ناحیه اندکی کاهش یافته است.

کلیدواژه‌ها

موضوعات


[1]          Rahman A., Tafti D.,. Characterization of Heat Transfer Enhancement for an Oscillating Flat Plate-Fin. International Journal of Heat and Mass Transfer, Vol. 147, pp. 11900, 2019.
[2]          Agyenim F., Eames P., Smyth M., A Comparison of Heat Transfer Enhancement in a Medium Temperature Thermal Energy Storage Heat Exchanger Using Fins. Sol Energy, Vol.  83, No.9, pp. 1509–1520, 2009.
[3]          Systems HR., Reay D., Bay W., Review Paper Heat Transfer Enhancement - -A Review of Techniques and Their Possible Impact on Energy Efficiency in The U.K . Vol. 1, No.1, pp. 1-40, 1991.
[4]          Garoosi F., Hoseininejad F., Rashidi MM., Numerical Study of Heat Transfer Performance of Nanofluids in a Heat Exchanger. Applied Thermal Engineering, Vol. 105, pp. 436–455, 2016.
[5]          Nagarani N., Mayilsamy K., Murugesan A., Kumar GS., Review of Utilization of Extended Surfaces in Heat Transfer Problems. Renewable and Sustainable Energy Reviews, Vol. 29, pp. 604–613, 2013.
[6]          Gawande VB., Dhoble AS., Zodpe DB., Effect of Roughness Geometries on Heat Transfer Enhancement in Solar Thermal Systems. Renewable and Sustainable Energy Reviews, Vol. 32, pp. 347–378, 2014.
[7]          Sheikholeslami M., Gorji-Bandpy M., Ganji DD., Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices. Renewable and Sustainable Energy Reviews, Vol. 49, pp. 444–469, 2015.
[8]          Wu JM., Zhao J., A Review of Nanofluid Heat Transfer and Critical Heat Flux Enhancement—Research Gap to Engineering Application. Progress in Nuclear Energy, Vol. 66, pp. 13–24, 2013.
[9]          Shi J., Hu J., Schafer SR., Chen C-L., Numerical Study of Heat Transfer Enhancement of Channel Via Vortex-Induced Vibration. Applied Thermal Engineering, Vol. 70, pp. 838–845, 2014.
[10]        Tang J., Hu X., Yu Y., Electric Field Effect on The Heat Transfer Enhancement in a Vertical Rectangular Microgrooves Heat Sink. International Journal of Thermal Sciences, Vol. 150, pp. 106222, 2020.
[11]        Jafar AB., Shafie S., Ullah I., MHD Radiative Nanofluid Flow Induced by a Nonlinear Stretching Sheet in a Porous Medium. Heliyon, Vol. 6, No. 6, pp. e04201, 2020.
[12]         Ashafa S., Ahmed A.A., Sakir A.A., Analytical Solution of The Effect of MHD Inclination and Unsteady Heat Transfer in a Laminar, Transition and Turbulent Flow of a Basic Gaseous Micro-Flow Past a Vertically Moving Oscillating Plate. merican Journal of Engineering & Natural Sciences (AJENS), Vol. 1, pp. 29, 2017.
 
[13]        Ellahi R., Alamri S.Z., Basit A., Majeed A., Effects of MHD and Slip on Heat Transfer Boundary Layer Flow Over a Moving Plate Based on Specific Entropy Generation. Journal of Taibah University for Science, Vol. 12, No.4, pp. 476–482, 2018.
[14]        Rahimi M., Soran RA., Slot Jet Impingement Heat Transfer for The Cases of Moving Plate and Moving Nozzle. Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 38,No.8, pp. 2651–2659, 2016.
[15]        Cheng M., Luo L., Characteristics of Two-Dimensional Flow Around a Rotating Circular Cylinder Near a Plane Wall. Physics of Fluids,Vol. 19, No.6, pp. :063601, 2007.
[16]        Beskok A., Raisee M., Celik B., et al, Heat Transfer Enhancement in a Straight Channel Via a Rotationally Oscillating Adiabatic Cylinder. International  Journal of Theramal Sciences, Vol. 58, pp. 61–69, 2012.
[17]        Celik B., Raisee M., Beskok A., Heat Transfer Enhancement in a Slot Channel Via a Transversely Oscillating Adiabatic Circular Cylinder. International Journal of Heat and Mass Transfer, Vol. 53, No.4, pp. 626-634, 2010.
[18]        Badr HM., Dennis SCR., Laminar Forced Convection From a Rotating Cylinder. International Journal of Heat and Mass Transfer, Vol.  28, No.1, pp. 253–264, 1985.
[19]        Ma H., Zhou W., Lu X., et al, Investigation on The Air Flow and Heat Transfer From a Horizontal Rotating Cylinder. International Journal of Thermal Sciences, Vol. 95, pp. 21–28, 2015.
[20]        Hassanzadeh R., Rahimi R., Khosravipour A., et al, Analysis of Natural Convection in a Square Cavity in The Presence of a Rotating Cylinder With a Specific Number of Roughness Components. International Communications in Heat and Mass Transfer, Vol. 116, 2020.
[21]        Yu G., Lian Z., Gan W., Ji J., Numerical Investigation on The Effect of Harmonic Horizontal-Axis Rotation on Laminar Natural Convection in an Air-Filled Enclosure. International Journal of Heat and Mass Transf, Vol. 152, pp. 119533, 2020.
[22]        Al-Zurfi N., Alhusseny A., Nasser A., Effect of Rotation on Forced Convection in Wavy Wall Channels. International Journal of Heat and Mass Transfer, Vol. 149, pp. 119177, 2020.
[23]        Ali MAM., El-Maghlany WM., Eldrainy YA., Attia A., Heat Transfer Enhancement of Double Pipe Heat Exchanger Using Rotating of Variable Eccentricity Inner Pipe. Alexandria Engineering Journal, Vol. 57, No.4, pp. 3709–3725, 2018.
[24]        Murata A., Iwamoto K., Heat and Fluid Flow in Cylindrical and Conical Annular Flow-Passages with Through Flow and Inner-Wall Rotation. International Journal of Heat and Fluid Flow, Vol. 32, No.2, pp. 378–391, 2011.
[25]        Cavalheiro M.G., Woiski E.R., and  Del Rio Vieira E., Experimental Study of Flow Past an Elliptic Cylinder Near a Flat Plate. Conference At Belem do Para, Berzil, 2014.
[26]        Mikheev NI., Molochnikov VM., Mikheev AN., Dushina OA., Hydrodynamics and Heat ttansfer of Pulsating Flow Around a cylinder. International Journal of Heat and Mass Transfer, Vol. 109, pp. 254–265, 2017.
[27]        Izadpanah E., Babaie Rabiee M., Sadeghi H., Talebi S., Effect of Rotating and Oscillating Blade on The Heat Transfer Enhancement of Non-Newtonian Fluid Flow in a Channel. Applied Thermal Engineering, Vol. 113, pp. 1277–1282, 2017.
[28]        Pourgholam M., Izadpanah E., Motamedi R., Habibi SE., Convective Heat Transfer Enhancement in a Parallel Plate Channel By Means of Rotating or Oscillating Blade in The Angular Direction. Applied Thermal Engineering, Vol. 78, pp. 248–257, 2015.
[29]        Hussam WK., Thompson MC., Sheard GJ., Enhancing Heat Transfer in a High Hartmann Number Magnetohydrodynamic Channel Flow Via Torsional Oscillation of a Cylindrical Obstacle. Physics of Fluids, Vol. 24, No.11, pp. 113601, 2012.
[30]        Suriyawong A., Saisorn S., Wongwises S., Pool Boiling Heat Transfer Enhancement of Distilled Water With Passive Rotating Blades Installed Above The Heating Surface. Experimental Thermal and Fluid Science, Vol. 87, pp. 109–116, 2017.
[31]        Sarhan AR., Karim MR., Kadhim ZK., Naser J., Experimental Investigation on The Effect of Vertical Vibration on Thermal Performances of Rectangular Flat Plate. Experimental Thermal and Fluid Science, Vol. 101, pp. 231–240, 2019.