Numerical Investigation of the Effects of Rectangular Obstacles on the Thermal-Hydraulic Properties of a Circular Corrugated Channel

Ferhat Koca; Cahit Gürlek

Makale detayları

Numerical Investigation of the Effects of Rectangular Obstacles on the Thermal-Hydraulic Properties of a Circular Corrugated Channel

Yazarlar:

Ferhat Koca | Cahit Gürlek

Yayıncı:

Cukurova University

Ana Başlıklar:

Mekatronik Mühendisliği | Makine Mühendisliği (Diğer)

Dergi:

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 3, pp.661-670

Belge Tipi:

Makale

Yayın Tarihi:

10/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001301549

pISSN:

2757-9255

Anahtar kelimeler:

Özet:

 In this study, the effect of rectangular obstacles, placed at different angles and heights on the bottom surface of a circular corrugated channel, on the channels thermal-hydraulic properties was investigated numerically. For analysis, a 500x10 mm dimensional channel, consisting of three sections upstream, corrugated, and downstream, was used. The obstacles were placed on the canal surface at three different angles β45, 90 and 135 and at three different heights hH0.1, 0.25 and 0.5. The solutions of the continuity, momentum and energy equations were performed using the k-ε turbulence model by means of the Ansys-Fluent finite volume method. For the flow field, the turbulent kinetic energy TKE contours, the average Nusselt number Nu, friction factor f, pressure drop ΔP and performance evaluation criterion number PEC values were obtained for the Reynolds number Re 5000-20000 range. The highest thermal-hydraulic performance was obtained for the hH0.1, β45 channel model. This is 26.19 higher than the hH0.5, β135 model with the lowest performance according to PEC values.

 In this study, the effect of rectangular obstacles, placed at different angles and heights on the bottom surface of a circular corrugated channel, on the channels thermal-hydraulic properties was investigated numerically. For analysis, a 500x10 mm dimensional channel, consisting of three sections upstream, corrugated, and downstream, was used. The obstacles were placed on the canal surface at three different angles β45, 90 and 135 and at three different heights hH0.1, 0.25 and 0.5. The solutions of the continuity, momentum and energy equations were performed using the k-ε turbulence model by means of the Ansys-Fluent finite volume method. For the flow field, the turbulent kinetic energy TKE contours, the average Nusselt number Nu, friction factor f, pressure drop ΔP and performance evaluation criterion number PEC values were obtained for the Reynolds number Re 5000-20000 range. The highest thermal-hydraulic performance was obtained for the hH0.1, β45 channel model. This is 26.19 higher than the hH0.5, β135 model with the lowest performance according to PEC values.

 In this study, the effect of rectangular obstacles, placed at different angles and heights on the bottom surface of a circular corrugated channel, on the channels thermal-hydraulic properties was investigated numerically. For analysis, a 500x10 mm dimensional channel, consisting of three sections upstream, corrugated, and downstream, was used. The obstacles were placed on the canal surface at three different angles β45, 90 and 135 and at three different heights hH0.1, 0.25 and 0.5. The solutions of the continuity, momentum and energy equations were performed using the k-ε turbulence model by means of the Ansys-Fluent finite volume method. For the flow field, the turbulent kinetic energy TKE contours, the average Nusselt number Nu, friction factor f, pressure drop ΔP and performance evaluation criterion number PEC values were obtained for the Reynolds number Re 5000-20000 range. The highest thermal-hydraulic performance was obtained for the hH0.1, β45 channel model. This is 26.19 higher than the hH0.5, β135 model with the lowest performance according to PEC values.

 Bu çalışmada dairesel oluklu bir kanalın alt yüzeyine farklı açılar ve yüksekliklerde yerleştirilen dikdörtgensel engellerin kanalın ısıl-hidrolik özelliklerine olan etkisi sayısal olarak incelenmiştir. Analizler için 500x10 mm boyutlarında üç bölümden oluşan yukarı akış, oluklu ve aşağı akış bir kanal kullanılmıştır. Engeller kanal yüzeyine üç farklı açı β45, 90 ve 135 ve üç farklı yükseklikte hH0,1, 0,25 ve 0,5 yerleştirilmiştir. Süreklilik, momentum ve enerji denklemlerinin çözümleri k-ε türbülans modeli kullanılarak Ansys-Fluent sonlu hacimler yöntemi ile gerçekleştirilmiştir. Akış alanına ait türbülans kinetik enerji TKE konturları ile ortalama Nusselt sayısı Nu, sürtünme faktörü f, basınç düşüşü ΔP ve performans değerlendirme kıstas sayısı PEC değerleri Reynolds sayısının Re 5000-20000 aralığı için elde edilmiştir. En yüksek termal-hidrolik performans hH0,1, β45 kanal modeli için elde edilmiştir. Bu durum PEC değerlerine göre en düşük performansa sahip hH0,5, β135 modele kıyasla 26,19 daha fazladır.

Makale detayları

Numerical Investigation of the Effects of Rectangular Obstacles on the Thermal-Hydraulic Properties of a Circular Corrugated Channel

Yazarlar:

Ferhat Koca | Cahit Gürlek

Yayıncı:

Cukurova University

Ana Başlıklar:

Mekatronik Mühendisliği | Makine Mühendisliği (Diğer)

Dergi:

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 3, pp.661-670

Belge Tipi:

Makale

Yayın Tarihi:

10/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001301549

pISSN:

2757-9255

Corrugated channel flow

Heat transfer enhancement

PEC number

Rectangular obstaclesDikdörtgensel engeller

Isı transferi artırma

Oluklu kanal akışı

PEC sayısı

Sayı

Makale detayları

Yazarlar: Ferhat Koca | Cahit Gürlek

Yayıncı: Cukurova University

Ana Başlıklar: Mekatronik Mühendisliği | Makine Mühendisliği (Diğer)

Dergi: Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 3, pp.661-670

Belge Tipi: Makale

Yayın Tarihi: 10/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001301549

pISSN: 2757-9255

Sayı

Yazarlar:

Ferhat Koca | Cahit Gürlek

Yayıncı:

Cukurova University

Ana Başlıklar:

Mekatronik Mühendisliği | Makine Mühendisliği (Diğer)

Dergi:

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 3, pp.661-670

Belge Tipi:

Makale

Yayın Tarihi:

10/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001301549

pISSN:

2757-9255