NUMERICAL ANALYSIS OF THERMAL PERFORMANCE IN A CIRCULAR DUCT WITH DIFFERENT TURBULATORS

Selma Akçay

Makale detayları

NUMERICAL ANALYSIS OF THERMAL PERFORMANCE IN A CIRCULAR DUCT WITH DIFFERENT TURBULATORS

Yazarlar:

Selma Akçay

Yayıncı:

Süleyman Demirel University

Ana Başlıklar:

Üretim ve Endüstri Mühendisliği (Diğer) | Makine Mühendisliği

Dergi:

Mühendislik Bilimleri ve Tasarım Dergisi Vol.12 Issue 1, pp.1-15

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001313916

pISSN:

1308-6693

Anahtar kelimeler:

Özet:

 In this study, the thermal performance of circular cross-section duct flows with different turbulators was numerically analyzed. The simulations were solved with the Computational Fluid Dynamics CFD based Fluent program. In the study, seven turbulator structures consisting of vertical and inclined baffles were used. These turbulators were placed in the center of the duct and the duct surfaces containing the turbulators were maintained at constant temperature Tw350K conditions. Nusselt number Nu, friction factor f, and thermal performance factor TPF were calculated in two different Reynolds numbers Re5000 and Re10000. Numerical solutions were compared with previous study results and correlations. To observe the effects of turbulators on flow and heat transfer, flow and temperature contours were obtained inside the duct. The study was also compared with the smooth duct flow. The findings showed that the turbulators added in the duct improved the heat transfer and the Nu increased 1.38 times compared to the duct without turbulator. In addition, the heat transfer increased with increasing the duct inlet velocity. The highest heat transfer was found to be Nu27.17 in the case of Duct 8 at Re10000 and the highest TPF was obtained to be TPF1.08 at Re5000 in the Duct 8.

 In this study, the thermal performance of circular cross-section duct flows with different turbulators was numerically analyzed. The simulations were solved with the Computational Fluid Dynamics CFD based Fluent program. In the study, seven turbulator structures consisting of vertical and inclined baffles were used. These turbulators were placed in the center of the duct and the duct surfaces containing the turbulators were maintained at constant temperature Tw350K conditions. Nusselt number Nu, friction factor f, and thermal performance factor TPF were calculated in two different Reynolds numbers Re5000 and Re10000. Numerical solutions were compared with previous study results and correlations. To observe the effects of turbulators on flow and heat transfer, flow and temperature contours were obtained inside the duct. The study was also compared with the smooth duct flow. The findings showed that the turbulators added in the duct improved the heat transfer and the Nu increased 1.38 times compared to the duct without turbulator. In addition, the heat transfer increased with increasing the duct inlet velocity. The highest heat transfer was found to be Nu27.17 in the case of Duct 8 at Re10000 and the highest TPF was obtained to be TPF1.08 at Re5000 in the Duct 8.

 In this study, the thermal performance of circular cross-section duct flows with different turbulators was numerically analyzed. The simulations were solved with the Computational Fluid Dynamics CFD based Fluent program. In the study, seven turbulator structures consisting of vertical and inclined baffles were used. These turbulators were placed in the center of the duct and the duct surfaces containing the turbulators were maintained at constant temperature Tw350K conditions. Nusselt number Nu, friction factor f, and thermal performance factor TPF were calculated in two different Reynolds numbers Re5000 and Re10000. Numerical solutions were compared with previous study results and correlations. To observe the effects of turbulators on flow and heat transfer, flow and temperature contours were obtained inside the duct. The study was also compared with the smooth duct flow. The findings showed that the turbulators added in the duct improved the heat transfer and the Nu increased 1.38 times compared to the duct without turbulator. In addition, the heat transfer increased with increasing the duct inlet velocity. The highest heat transfer was found to be Nu27.17 in the case of Duct 8 at Re10000 and the highest TPF was obtained to be TPF1.08 at Re5000 in the Duct 8.

 Bu çalışmada, içerisinde farklı türbülatörlere sahip dairesel kesitli kanal akışlarının termal performansı sayısal olarak analiz edilmiştir. Simülasyonlar, Hesaplamalı Akışkanlar Dinamiği HAD tabanlı Fluent programı ile çözülmüştür. Çalışmada, dik ve eğik bölmelerden oluşan yedi farklı türbülatör yapısı kullanılmıştır. Bu türbülatörler kanalın merkezine yerleştirilmiş ve türbülatörleri içeren kanal dış yüzeyleri sabit sıcaklık Tw350K şartlarında korunmuştur. İki farklı Reynolds sayısı Re5000 ve Re10000 için Nusselt sayısı Nu, sürtünme faktörü f ve termal performans faktörü TPF hesaplanmıştır. Sayısal çözümler, önceki çalışma sonuçları ve ampirik bağıntılar ile karşılaştırılmıştır. Türbülatörlerin akış ve ısı transferi üzerindeki etkilerini gözlemleyebilmek için kanal içinde akış ve sıcaklık görüntüleri elde edilmiştir. Yapılan çalışma, aynı zamanda türbülatörsüz kanal akışı ile karşılaştırılmıştır. Elde edilen bulgular, kanal içine eklenen türbülatörlerin ısı transferini iyileştirdiğini ve türbülatörsüz kanala göre Nu 1,38 kat arttığını göstermiştir. Ayrıca kanal giriş hızının artması ile ısı transferi artmıştır. En yüksek ısı transferi Re10000de Kanal 8 durumunda Nu27,17 olarak bulunmuş ve en yüksek TPF Re5000de Kanal 8de TPF1,08 olarak elde edilmiştir.

Makale detayları

NUMERICAL ANALYSIS OF THERMAL PERFORMANCE IN A CIRCULAR DUCT WITH DIFFERENT TURBULATORS

Yazarlar:

Selma Akçay

Yayıncı:

Süleyman Demirel University

Ana Başlıklar:

Üretim ve Endüstri Mühendisliği (Diğer) | Makine Mühendisliği

Dergi:

Mühendislik Bilimleri ve Tasarım Dergisi Vol.12 Issue 1, pp.1-15

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001313916

pISSN:

1308-6693

Turbulator

Circular Channel

Heat Transfer

Thermal Performance

Friction FactorTürbülatör

Dairesel Kanal

Isı Transferi

Termal Performans

Sürtünme Faktörü

Sayı

Makale detayları

Yazarlar: Selma Akçay

Yayıncı: Süleyman Demirel University

Ana Başlıklar: Üretim ve Endüstri Mühendisliği (Diğer) | Makine Mühendisliği

Dergi: Mühendislik Bilimleri ve Tasarım Dergisi Vol.12 Issue 1, pp.1-15

Belge Tipi: Makale

Yayın Tarihi: 3/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001313916

pISSN: 1308-6693

Sayı

Yazarlar:

Selma Akçay

Yayıncı:

Süleyman Demirel University

Ana Başlıklar:

Üretim ve Endüstri Mühendisliği (Diğer) | Makine Mühendisliği

Dergi:

Mühendislik Bilimleri ve Tasarım Dergisi Vol.12 Issue 1, pp.1-15

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001313916

pISSN:

1308-6693