Investigating Effect of Geometric Differences on Fluid Behavior in Synthetic Jets

Hürrem Akbıyık

Makale detayları

Investigating Effect of Geometric Differences on Fluid Behavior in Synthetic Jets

Yazarlar:

Hürrem Akbıyık

Yayıncı:

Cukurova University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 2, pp.305-316

Belge Tipi:

Makale

Yayın Tarihi:

7/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001293583

pISSN:

2757-9255

Anahtar kelimeler:

Özet:

 A synthetic jet is a flow that is created by an actuator vibrating at a specific frequency and amplitude. In this study the velocities and propagation of synthetic jets have been measured using both circular and single-wave orifice geometries. Axial velocity measurements in the direction of flow have been taken using the PCE 423 model hot wire anemometer. Also flow visualization has been performed using TiO2 surface oil visualization to determine velocity distributions in the radial direction. The measurements have been conducted at different HD values, representing the ratio between the axial distance H and the orifice diameter D. The excitation frequency has been varied between 4 Hz and 5 Hz with a sinusoidal signal type. The results have shown that circular orifice geometry have higher velocities in the axial direction. However, When the axial velocity was measured at 4 Hz, it has been observed that the single wave geometry provided results close to a circle at HD  13 and 14 values, and at 5 Hz for HD  12 and 13 values. This suggests that the geometric shape is not very important at high HD ratios. In addition, the axial velocity values for a single wave orifice geometry show almost the close results for both excitation frequency values. The flow visualization results have indicated that the single-wave orifice geometry with HD12 ratio perform better and provides a more accurate and well-distributed velocity field. In conclusion, the findings of this study suggest that synthetic jets could be potentially useful for industrial applications, especially in heat transfer applications with their extended flow field implications.

 A synthetic jet is a flow that is created by an actuator vibrating at a specific frequency and amplitude. In this study the velocities and propagation of synthetic jets have been measured using both circular and single-wave orifice geometries. Axial velocity measurements in the direction of flow have been taken using the PCE 423 model hot wire anemometer. Also flow visualization has been performed using TiO2 surface oil visualization to determine velocity distributions in the radial direction. The measurements have been conducted at different HD values, representing the ratio between the axial distance H and the orifice diameter D. The excitation frequency has been varied between 4 Hz and 5 Hz with a sinusoidal signal type. The results have shown that circular orifice geometry have higher velocities in the axial direction. However, When the axial velocity was measured at 4 Hz, it has been observed that the single wave geometry provided results close to a circle at HD  13 and 14 values, and at 5 Hz for HD  12 and 13 values. This suggests that the geometric shape is not very important at high HD ratios. In addition, the axial velocity values for a single wave orifice geometry show almost the close results for both excitation frequency values. The flow visualization results have indicated that the single-wave orifice geometry with HD12 ratio perform better and provides a more accurate and well-distributed velocity field. In conclusion, the findings of this study suggest that synthetic jets could be potentially useful for industrial applications, especially in heat transfer applications with their extended flow field implications.

 A synthetic jet is a flow that is created by an actuator vibrating at a specific frequency and amplitude. In this study the velocities and propagation of synthetic jets have been measured using both circular and single-wave orifice geometries. Axial velocity measurements in the direction of flow have been taken using the PCE 423 model hot wire anemometer. Also flow visualization has been performed using TiO2 surface oil visualization to determine velocity distributions in the radial direction. The measurements have been conducted at different HD values, representing the ratio between the axial distance H and the orifice diameter D. The excitation frequency has been varied between 4 Hz and 5 Hz with a sinusoidal signal type. The results have shown that circular orifice geometry have higher velocities in the axial direction. However, When the axial velocity was measured at 4 Hz, it has been observed that the single wave geometry provided results close to a circle at HD  13 and 14 values, and at 5 Hz for HD  12 and 13 values. This suggests that the geometric shape is not very important at high HD ratios. In addition, the axial velocity values for a single wave orifice geometry show almost the close results for both excitation frequency values. The flow visualization results have indicated that the single-wave orifice geometry with HD12 ratio perform better and provides a more accurate and well-distributed velocity field. In conclusion, the findings of this study suggest that synthetic jets could be potentially useful for industrial applications, especially in heat transfer applications with their extended flow field implications.

 Sentetik jet, belirli bir frekansta ve genlikte titreşen bir aktüatör tarafından oluşturulan bir akıştır. Bu çalışmada, dairesel ve tek dalga orifis geometrileri kullanılarak sentetik jetlerin hızları ve yayılımı ölçülmüştür. Akış yönünde eksenel hız ölçümleri PCE 423 model sıcak tel anemometresi kullanılarak alınmıştır. Ayrıca, TiO2 yüzey yağ görselleştirmesi kullanılarak radyal yöndeki hız dağılımlarını belirlemek için akış görselleştirme yapılmıştır. Ölçümler, eksenel mesafe H ve orifis çapı D arasındaki oranı temsil eden farklı HD değerlerinde gerçekleştirilmiştir. Uyarma frekansı sinüs sinyal tipi ile 4 Hz ve 5 Hz arasında değiştirilmiştir. Sonuçlar, dairesel orifis geometrisinin eksenel yönde daha yüksek hızlara sahip olduğunu göstermiştir. Ancak, eksenel hız 4 Hzde ölçüldüğünde, tek dalga geometrisinin HD  13 ve 14 değerlerinde daireye yakın sonuçlar verdiği, 5 Hzde ise HD  12 ve 13 değerlerinde benzer sonuçlar sağladığı gözlemlenmiştir. Bu, yüksek HD oranlarında geometrik şeklin çok önemli olmadığını düşündürmektedir. Ayrıca, tek dalga orifis geometrisi için eksenel hız değerleri, her iki uyarma frekansı için neredeyse aynı sonuçlar vermiştir. Akış görselleştirme sonuçları, HD  12 oranı için tek dalga orifis geometrisinin daha iyi performans gösterdiğini ve daha doğru ve iyi dağılmış bir hız alanı sağladığını göstermiştir. Sonuç olarak, bu çalışmanın bulguları, sentetik jetlerin özellikle geniş akış alanı etkileriyle ısı transferi uygulamalarında potansiyel olarak kullanışlı olabileceğini göstermektedir.

Makale detayları

Investigating Effect of Geometric Differences on Fluid Behavior in Synthetic Jets

Yazarlar:

Hürrem Akbıyık

Yayıncı:

Cukurova University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 2, pp.305-316

Belge Tipi:

Makale

Yayın Tarihi:

7/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001293583

pISSN:

2757-9255

Synthetic jet

Hot wire anemometer

Flow visualization

Single wave orifice

Excitation frequency

Flow control techniqueSentetik jet

Sıcak tel anemometresi

Akış görselleştirme

Tek dalga orifis

Uyarma frekansı

Akış kontrol tekniği

Sayı

Makale detayları

Yazarlar: Hürrem Akbıyık

Yayıncı: Cukurova University

Ana Başlıklar: Makine Mühendisliği (Diğer)

Dergi: Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 2, pp.305-316

Belge Tipi: Makale

Yayın Tarihi: 7/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001293583

pISSN: 2757-9255

Sayı

Yazarlar:

Hürrem Akbıyık

Yayıncı:

Cukurova University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi Vol.38 Issue 2, pp.305-316

Belge Tipi:

Makale

Yayın Tarihi:

7/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001293583

pISSN:

2757-9255