ارزیابی سه‌بعدی هندسه مولد گردابه طولی در مبدل پره–لوله برای ارتقای انتقال حرارت با کاربرد در مهندسی پزشکی

نوع مقاله : مقاله علمی

نویسنده
حمید رضا مرتضوی بنی
دانشیار، گروه مهندسی پزشکی، واحد ارسنجان، دانشگاه آزاد اسلامی، ارسنجان، ایران
10.22034/stme.2026.564866.1194
چکیده
در این پژوهش، عملکرد حرارتی–هیدرولیکیِ یک مبدل حرارتی پره–لوله با به‌کارگیری مولدهای گردابه طولی به صورت سه‌بعدی و عددی ارزیابی شده است. هدف، سنجش اثر شکل بالچه‌ها بر ارتقای انتقال حرارت و تحلیل توازن آن با افت فشار، با تأکید بر کاربردهای مهندسی پزشکی مانند گرم‌کن خون و مبدل‌های سامانه‌های پشتیبانی حیات است. دو گونه بالچه مثلثی و نیمه ‌استوانه‌ای مدل‌سازی و شبیه‌سازی شد و شرایط محاسباتی به‌گونه‌ای تنظیم گردید که رفتار جریان از ناحیه آرامِ نزدیک به دیواره تا حالت‌های گذار پوشش داده شود. یافته‌ها نشان می‌دهد بالچه نیمه ‌استوانه‌ای با ایجاد گردابه‌های طولی پایدارتر و افزایش اختلاط، به نازک ‌شدن لایه مرزی حرارتی انجامیده و میانگین جابه‌جایی حرارتی را نسبت به نوع مثلثی افزایش می‌دهد؛ هرچند همراه با افزایش افت فشار است. همچنین با افزایش عدد رینولدز، انتقال حرارت تقویت و هم‌زمان افت فشار بیشتر می‌شود و افزایش دمای ورودیِ سیال سرد، به کاهش ضریب انتقال حرارت در دیواره می‌انجامد. جمع‌بندی نتایج نشان می‌دهد در محدوده عملیاتی بررسی‌شده، هندسه نیمه ‌استوانه‌ای برای دستیابی به توازن مناسب میان ارتقای حرارتی و هزینه پمپاژ در مبدل‌های فشرده با کاربری پزشکی، گزینه کارآمدتری است.
کلیدواژه‌ها
مبدل حرارتی پره–لوله
مولد گردابه طولی
بالچه مثلثی
بالچه نیمه‌استوانه‌ای
مهندسی پزشکی
موضوعات

عنوان مقاله English

Three-Dimensional Evaluation of Longitudinal Vortex Generator Geometry in a Fin–Tube Heat Exchanger for Heat Transfer Enhancement with Applications in Biomedical Engineering

نویسنده English

Hamidreza Mortazavy Beni
Associate professor, Department of Biomedical Engineering, Ars.C., Islamic Azad University, Arsanjan, Iran
چکیده English

In this study, the thermo-hydraulic performance of a fin-and-tube heat exchanger equipped with longitudinal vortex generators was investigated numerically through a three-dimensional computational approach. The primary objective was to evaluate the influence of winglet geometry on heat transfer enhancement and to analyze the associated trade-off with pressure drop, with particular emphasis on biomedical engineering applications such as blood warmers and heat exchangers used in life-support systems. Two vortex-generator configurations, namely triangular and semi-cylindrical winglets, were modeled and simulated under flow conditions spanning from near-wall laminar behavior to transitional regimes.
The results demonstrate that the semi-cylindrical winglet generates more stable longitudinal vortices and promotes stronger fluid mixing, leading to thermal boundary-layer thinning and consequently higher average convective heat transfer compared with the triangular configuration, although at the expense of an increased pressure drop. Furthermore, increasing the Reynolds number enhances heat transfer while simultaneously intensifying pressure losses. In contrast, increasing the inlet temperature of the cold fluid reduces the wall heat transfer coefficient. Overall, the findings indicate that within the investigated operating range, the semi-cylindrical geometry provides a more favorable balance between thermal enhancement and pumping-power requirements, making it a more efficient option for compact heat exchangers employed in biomedical applications

کلیدواژه‌ها English

Fin-And-Tube Heat Exchanger
Longitudinal Vortex Generator
Triangular Winglet
Semi-Cylindrical Winglet
Biomedical Engineering
[1] A. S. Annamalai and R. Velraj, “Experimental investigation and CFD analysis of a air cooled condenser heat pipe,” Thermal Science, Vol. 15, No. 3, pp. 759–772, 2011, DOI: 10.2298/TSCI100331023A.
[2] M. Sudharsan, M. K. Kaman, and M. Cheralathan, “Numerical study on fin and tube heat exchanger by using elliptical tube-vortex generator,” IOP Conference Series: Materials Science and Engineering, Vol. 912, Art. no. 042044, 2020, DOI: 10.1088/1757-899X/912/4/042044.
[3] D. Sahel, H. Ameur, and M. Mellal, “Effect of tube shape on the performance of a fin and tube heat exchanger,” Journal of Mechanical Engineering and Sciences, Vol. 14, No. 2, pp. 6709–6718, 2020, DOI: 10.15282/jmes.14.2.2020.13.0525.
[4] C. W. Lu, J. M. Huang, W. C. Nien, and C.-C. Wang, “A numerical investigation of the geometric effects on the performance of plate finned-tube heat exchanger,” Energy Conversion and Management, Vol. 52, No. 3, pp. 1638–1643, 2011, DOI: 10.1016/j.enconman.2010.10.026.
[5] K. Thirumalai Kannan and B. Senthil Kumar, “Heat transfer and fluid flow analysis in plate-fin and tube heat exchangers with different shaped vortex generators,” International Journal of Soft Computing and Engineering, Vol. 2, No. 1, pp. 357–361, 2011.
[6] J. Y. Jang, M. C. Wu, and W. J. Chang, “Numerical and experimental studies of three-dimensional plate-fin and tube heat exchangers,” International Journal of Heat and Mass Transfer, Vol. 39, No. 14, pp. 3057–3066, 1996, DOI: 10.1016/0017-9310(95)00341-X.
[7] S. W. Hwang, D. H. Kim, J. K. Min, and J. H. Jeong, “CFD analysis of fin tube heat exchanger with a pair of delta winglet vortex generators,” Journal of Mechanical Science and Technology, Vol. 26, No. 9, pp. 2949–2958, 2012, DOI: 10.1007/s12206-012-0702-2.
[8] C. B. Allison and B. B. Dally, “Effect of a delta-winglet vortex pair on the performance of a tube-fin heat exchanger,” International Journal of Heat and Mass Transfer, Vol. 50, No. 25–26, pp. 5065–5072, 2007, DOI: 10.1016/j.ijheatmasstransfer.2007.08.003.
[9] K. Barquín and A. Valencia, “Comparison of different fin and tube compact heat exchanger with longitudinal vortex generator in CFU-CFD configurations,” International Journal of Heat and Technology, Vol. 39, No. 5, pp. 1523–1531, 2021, DOI: 10.18280/ijht.390514.
[10] Y. G. Lei, Y. L. He, L. T. Tian, P. Chu, and W. Q. Tao, “Hydrodynamics and heat transfer characteristics of a novel heat exchanger with delta-winglet vortex generators,” Chemical Engineering Science, Vol. 65, No. 5, pp. 1551–1562, 2010, DOI: 10.1016/j.ces.2009.10.017.
[11] B. Lotfi, M. Zeng, B. Sundén, and Q. Wang, “3D numerical investigation of flow and heat transfer characteristics in smooth wavy fin-and-elliptical tube heat exchangers using new type vortex generators,” Energy, Vol. 73, pp. 233–257, 2014, DOI: 10.1016/j.energy.2014.06.016.
[12] M. Zeeshan, V. Kumar, S. Nath, and D. Bhanja, “A numerical investigation on the performance of finned tube heat exchangers having alternate arrangements of flat and circular tubes,” Journal of Physics: Conference Series, Vol. 1172, Art. no. 012057, 2019, DOI: 10.1088/1742-6596/1172/1/012057.
[13] M. Alipour and F. Ghadiri Modarres, “Automotive condenser operational relationships development based on numerical simulations and the design of experiment,” Journal of Fluid Mechanics and Aerodynamics, Vol. 10, No. 1, pp. 143–161, 2022. (in Persian)
[14] T. L. Bergman, A. S. Lavine, F. P. Incropera, and D. P. DeWitt, Introduction to Heat Transfer, 6th ed. Hoboken, NJ, USA: John Wiley & Sons, 2011.
[15] S. P. Datta, P. K. Das, and S. Mukhopadhyay, “Performance of a condenser of an automotive air conditioner with maldistribution of inlet air: Simulation studies and its experimental validation,” International Journal of Heat and Mass Transfer, Vol. 98, pp. 367–379, 2016, DOI: 10.1016/j.ijheatmasstransfer.2016.03.019.
[16] V. Malapure, S. K. Mitra, and A. Bhattacharya, “Numerical investigation of fluid flow and heat transfer over louvered fins in compact heat exchanger,” International Journal of Thermal Sciences, Vol. 46, No. 2, pp. 199–211, 2007, DOI: 10.1016/j.ijthermalsci.2006.04.010.
[17] R. Deriszadeh and A. Falahat, “Numerical and statistical study of cylindrical heat sink performance with interrupted minichannels and twisted vortex generator,” Journal of Solid and Fluid Mechanics, Vol. 15, No. 2, pp. 153–164, 2025, DOI: 10.22044/jsfm.2025.14607.3864. (in Persian)
[18] X. Qi, J. Yang, Y. Zhang, J. Wang, and X. Guo, “Simulation study of the influence of circular arc vortex generator size on the heat transfer characteristics of fin-and-tube heat exchanger,” Scientific Reports, Vol. 15, Art. no. 22059, 2025, DOI: 10.1038/s41598-025-05071-4.
[19] J. Batista, A. Trp, K. Lenić, and M. Kirinčić, “The influence of geometry parameters of rectangular vortex generators on the air-to-water fin-and-tube heat exchanger efficiency enhancement,” International Communications in Heat and Mass Transfer, Vol. 162, Art. no. 108647, 2025, DOI: 10.1016/j.icheatmasstransfer.2025.108647.
[20] X. Liang, J. Xu, M. Min, X. Fan, J. Wang, and J. Cheng, “Multi-objective optimization of vortex generators for enhanced thermal-fluid performance in finned-tube heat exchangers,” Applied Thermal Engineering, Vol. 283, Art. no. 128946, 2025, DOI: 10.1016/j.applthermaleng.2025.128946.
[21] A. Alshayji, M. Al-Bataineh, and N. F. Aljuwayhel, “Numerical simulation and topology optimization of fin-and-tube heat exchangers for enhanced performance,” Thermal Science and Engineering Progress, Vol. 67, Art. no. 104099, 2025, DOI: 10.1016/j.tsep.2025.104099.
[22] J. H. Choi, J. G. Gwon, H. K. Choi, and Y. G. Park, “Numerical analysis of the heat transfer effect on arc-shaped vortex generator height in a finned-tube heat exchanger,” Journal of Mechanical Science and Technology, Vol. 40, pp. 2329–2341, 2026, DOI: 10.1007/s12206-026-0263-4.‏
 
 
[1] A. S. Annamalai and R. Velraj, “Experimental investigation and CFD analysis of a air cooled condenser heat pipe,” Thermal Science, Vol. 15, No. 3, pp. 759–772, 2011, DOI: 10.2298/TSCI100331023A.
[2] M. Sudharsan, M. K. Kaman, and M. Cheralathan, “Numerical study on fin and tube heat exchanger by using elliptical tube-vortex generator,” IOP Conference Series: Materials Science and Engineering, Vol. 912, Art. no. 042044, 2020, DOI: 10.1088/1757-899X/912/4/042044.
[3] D. Sahel, H. Ameur, and M. Mellal, “Effect of tube shape on the performance of a fin and tube heat exchanger,” Journal of Mechanical Engineering and Sciences, Vol. 14, No. 2, pp. 6709–6718, 2020, DOI: 10.15282/jmes.14.2.2020.13.0525.
[4] C. W. Lu, J. M. Huang, W. C. Nien, and C.-C. Wang, “A numerical investigation of the geometric effects on the performance of plate finned-tube heat exchanger,” Energy Conversion and Management, Vol. 52, No. 3, pp. 1638–1643, 2011, DOI: 10.1016/j.enconman.2010.10.026.
[5] K. Thirumalai Kannan and B. Senthil Kumar, “Heat transfer and fluid flow analysis in plate-fin and tube heat exchangers with different shaped vortex generators,” International Journal of Soft Computing and Engineering, Vol. 2, No. 1, pp. 357–361, 2011.
[6] J. Y. Jang, M. C. Wu, and W. J. Chang, “Numerical and experimental studies of three-dimensional plate-fin and tube heat exchangers,” International Journal of Heat and Mass Transfer, Vol. 39, No. 14, pp. 3057–3066, 1996, DOI: 10.1016/0017-9310(95)00341-X.
[7] S. W. Hwang, D. H. Kim, J. K. Min, and J. H. Jeong, “CFD analysis of fin tube heat exchanger with a pair of delta winglet vortex generators,” Journal of Mechanical Science and Technology, Vol. 26, No. 9, pp. 2949–2958, 2012, DOI: 10.1007/s12206-012-0702-2.
[8] C. B. Allison and B. B. Dally, “Effect of a delta-winglet vortex pair on the performance of a tube-fin heat exchanger,” International Journal of Heat and Mass Transfer, Vol. 50, No. 25–26, pp. 5065–5072, 2007, DOI: 10.1016/j.ijheatmasstransfer.2007.08.003.
[9] K. Barquín and A. Valencia, “Comparison of different fin and tube compact heat exchanger with longitudinal vortex generator in CFU-CFD configurations,” International Journal of Heat and Technology, Vol. 39, No. 5, pp. 1523–1531, 2021, DOI: 10.18280/ijht.390514.
[10] Y. G. Lei, Y. L. He, L. T. Tian, P. Chu, and W. Q. Tao, “Hydrodynamics and heat transfer characteristics of a novel heat exchanger with delta-winglet vortex generators,” Chemical Engineering Science, Vol. 65, No. 5, pp. 1551–1562, 2010, DOI: 10.1016/j.ces.2009.10.017.
[11] B. Lotfi, M. Zeng, B. Sundén, and Q. Wang, “3D numerical investigation of flow and heat transfer characteristics in smooth wavy fin-and-elliptical tube heat exchangers using new type vortex generators,” Energy, Vol. 73, pp. 233–257, 2014, DOI: 10.1016/j.energy.2014.06.016.
[12] M. Zeeshan, V. Kumar, S. Nath, and D. Bhanja, “A numerical investigation on the performance of finned tube heat exchangers having alternate arrangements of flat and circular tubes,” Journal of Physics: Conference Series, Vol. 1172, Art. no. 012057, 2019, DOI: 10.1088/1742-6596/1172/1/012057.
[13] M. Alipour and F. Ghadiri Modarres, “Automotive condenser operational relationships development based on numerical simulations and the design of experiment,” Journal of Fluid Mechanics and Aerodynamics, Vol. 10, No. 1, pp. 143–161, 2022. (in Persian)
[14] T. L. Bergman, A. S. Lavine, F. P. Incropera, and D. P. DeWitt, Introduction to Heat Transfer, 6th ed. Hoboken, NJ, USA: John Wiley & Sons, 2011.
[15] S. P. Datta, P. K. Das, and S. Mukhopadhyay, “Performance of a condenser of an automotive air conditioner with maldistribution of inlet air: Simulation studies and its experimental validation,” International Journal of Heat and Mass Transfer, Vol. 98, pp. 367–379, 2016, DOI: 10.1016/j.ijheatmasstransfer.2016.03.019.
[16] V. Malapure, S. K. Mitra, and A. Bhattacharya, “Numerical investigation of fluid flow and heat transfer over louvered fins in compact heat exchanger,” International Journal of Thermal Sciences, Vol. 46, No. 2, pp. 199–211, 2007, DOI: 10.1016/j.ijthermalsci.2006.04.010.
[17] R. Deriszadeh and A. Falahat, “Numerical and statistical study of cylindrical heat sink performance with interrupted minichannels and twisted vortex generator,” Journal of Solid and Fluid Mechanics, Vol. 15, No. 2, pp. 153–164, 2025, DOI: 10.22044/jsfm.2025.14607.3864. (in Persian)
[18] X. Qi, J. Yang, Y. Zhang, J. Wang, and X. Guo, “Simulation study of the influence of circular arc vortex generator size on the heat transfer characteristics of fin-and-tube heat exchanger,” Scientific Reports, Vol. 15, Art. no. 22059, 2025, DOI: 10.1038/s41598-025-05071-4.
[19] J. Batista, A. Trp, K. Lenić, and M. Kirinčić, “The influence of geometry parameters of rectangular vortex generators on the air-to-water fin-and-tube heat exchanger efficiency enhancement,” International Communications in Heat and Mass Transfer, Vol. 162, Art. no. 108647, 2025, DOI: 10.1016/j.icheatmasstransfer.2025.108647.
[20] X. Liang, J. Xu, M. Min, X. Fan, J. Wang, and J. Cheng, “Multi-objective optimization of vortex generators for enhanced thermal-fluid performance in finned-tube heat exchangers,” Applied Thermal Engineering, Vol. 283, Art. no. 128946, 2025, DOI: 10.1016/j.applthermaleng.2025.128946.
[21] A. Alshayji, M. Al-Bataineh, and N. F. Aljuwayhel, “Numerical simulation and topology optimization of fin-and-tube heat exchangers for enhanced performance,” Thermal Science and Engineering Progress, Vol. 67, Art. no. 104099, 2025, DOI: 10.1016/j.tsep.2025.104099.
[22] J. H. Choi, J. G. Gwon, H. K. Choi, and Y. G. Park, “Numerical analysis of the heat transfer effect on arc-shaped vortex generator height in a finned-tube heat exchanger,” Journal of Mechanical Science and Technology, Vol. 40, pp. 2329–2341, 2026, DOI: 10.1007/s12206-026-0263-4.‏
 
 

  • تاریخ دریافت 16 آذر 1404
  • تاریخ بازنگری 04 اردیبهشت 1405
  • تاریخ پذیرش 02 خرداد 1405
  • تاریخ اولین انتشار 02 خرداد 1405
  • تاریخ انتشار 01 مرداد 1405