POD Analysis of Flow around Torpedo-Like Geometry with a Hemispherical Nose

Ömer Kenan; Bülent Yanıktepe; Muammer Ozgoren; Ertuğrul Şekeroğlu; Alpaslan Kılavuz; Hüseyin Akıllı; Levent Kavurmacıoğlu

Makale detayları

POD Analysis of Flow around Torpedo-Like Geometry with a Hemispherical Nose

Yazarlar:

Ömer Kenan | Bülent Yanıktepe | Muammer Ozgoren | Ertuğrul Şekeroğlu | Alpaslan Kılavuz | Hüseyin Akıllı | Levent Kavurmacıoğlu

Yayıncı:

Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar:

Enerji

Dergi:

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.6 Issue Ek Sayı, pp.555-566

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001305864

pISSN:

2687-3729

Anahtar kelimeler:

Özet:

 There has been an increased interest in underwater vehicles for a wide range of applications over the past decade. In the current study, flow characteristics around a common, torpedo-like geometry with a Myring profile were investigated at a length-based Reynolds number of Re20000 using the Particle Image Velocimetry PIV. As a result of PIV and Proper Orthogonal Decomposition POD analyzes in this study; instantaneous streamline topology Ψ, instantaneous vorticity ωLU_ contours, instantaneous streamwise velocity component uU_ graphs, cross-streamwise velocity component vU_ graphs, instantaneous vorticity ωLU_ graphs, perpendicular to the flow direction, instantaneous vortex graphs and time-averaged TKE graphs were evaluated and compared. At the same time, as a result of PIV analysis, time-average streamline topology Ψ and Time-averaged vorticity ωLU_  contours values are given. When the flow characteristics were compared by using the obtained POD method of the PIV results, it was determined that although the POD data were generally quite similar to the PIV results, the POD analysis results had a more uniform flow structure and vortex turbulence was lessened.

 There has been an increased interest in underwater vehicles for a wide range of applications over the past decade. In the current study, flow characteristics around a common, torpedo-like geometry with a Myring profile were investigated at a length-based Reynolds number of Re20000 using the Particle Image Velocimetry PIV. As a result of PIV and Proper Orthogonal Decomposition POD analyzes in this study; instantaneous streamline topology Ψ, instantaneous vorticity ωLU_ contours, instantaneous streamwise velocity component uU_ graphs, cross-streamwise velocity component vU_ graphs, instantaneous vorticity ωLU_ graphs, perpendicular to the flow direction, instantaneous vortex graphs and time-averaged TKE graphs were evaluated and compared. At the same time, as a result of PIV analysis, time-average streamline topology Ψ and Time-averaged vorticity ωLU_  contours values are given. When the flow characteristics were compared by using the obtained POD method of the PIV results, it was determined that although the POD data were generally quite similar to the PIV results, the POD analysis results had a more uniform flow structure and vortex turbulence was lessened.

 There has been an increased interest in underwater vehicles for a wide range of applications over the past decade. In the current study, flow characteristics around a common, torpedo-like geometry with a Myring profile were investigated at a length-based Reynolds number of Re20000 using the Particle Image Velocimetry PIV. As a result of PIV and Proper Orthogonal Decomposition POD analyzes in this study; instantaneous streamline topology Ψ, instantaneous vorticity ωLU_ contours, instantaneous streamwise velocity component uU_ graphs, cross-streamwise velocity component vU_ graphs, instantaneous vorticity ωLU_ graphs, perpendicular to the flow direction, instantaneous vortex graphs and time-averaged TKE graphs were evaluated and compared. At the same time, as a result of PIV analysis, time-average streamline topology Ψ and Time-averaged vorticity ωLU_  contours values are given. When the flow characteristics were compared by using the obtained POD method of the PIV results, it was determined that although the POD data were generally quite similar to the PIV results, the POD analysis results had a more uniform flow structure and vortex turbulence was lessened.

 Geçtiğimiz on yılda geniş bir uygulama yelpazesine sahip su altı araçlarına ilgi artmıştır. Bu çalışmada, Myring profiline sahip ortak, torpido benzeri bir geometri etrafındaki akış özellikleri, Parçacık Görüntüleme Hız Ölçme PIV yöntemi kullanılarak geometri boyuna göre tanımlanan Reynolds sayısının Re20000 değerinde incelenmiştir. Bu çalışmada PIV ve Uygun Orthogonal Ayrıştırma POD analizleri sonucunda; anlık akım çizgisi topolojisi Ψ, anlık girdap ωLU_ konturları, anlık akış yönünde hız bileşeni uU_ grafikleri, çapraz akış yönünde hız bileşeni vU_ grafikleri, anlık girdap ωLU_ grafikleri, akış yönüne dik, anlık girdap grafikler ve zaman ortalamalı TKE grafikleri değerlendirildi ve karşılaştırıldı. Aynı zamanda PIV analizi sonucunda zaman ortalamalı akım çizgisi topolojisi Ψ ve Zaman ortalamalı girdap ωLU_  kontur değerleri verilmiştir. POD yöntemini kullanarak elde ettiğimiz akış özelliklerini PIV sonuçlarıyla karşılaştırdığımızda POD verilerinin genel olarak PIV sonuçlarına oldukça benzer olmasına rağmen POD analiz sonuçlarının daha düzgün bir yapıya sahip olduğu ve girdap türbülansının daha az olduğu belirlendi.

Makale detayları

POD Analysis of Flow around Torpedo-Like Geometry with a Hemispherical Nose

Yazarlar:

Ömer Kenan | Bülent Yanıktepe | Muammer Ozgoren | Ertuğrul Şekeroğlu | Alpaslan Kılavuz | Hüseyin Akıllı | Levent Kavurmacıoğlu

Yayıncı:

Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar:

Enerji

Dergi:

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.6 Issue Ek Sayı, pp.555-566

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001305864

pISSN:

2687-3729

PIV

POD

Hemispherical nose

Torpedo-like geometry

Turbulent-flow

Vortical flowPIV

POD

Yarı küresel burun

Torpido benzeri geometri

Türbülanslı akış

Girdaplı akış

Sayı

Makale detayları

Yazarlar: Ömer Kenan | Bülent Yanıktepe | Muammer Ozgoren | Ertuğrul Şekeroğlu | Alpaslan Kılavuz | Hüseyin Akıllı | Levent Kavurmacıoğlu

Yayıncı: Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar: Enerji

Dergi: Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.6 Issue Ek Sayı, pp.555-566

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001305864

pISSN: 2687-3729

Sayı

Yazarlar:

Ömer Kenan | Bülent Yanıktepe | Muammer Ozgoren | Ertuğrul Şekeroğlu | Alpaslan Kılavuz | Hüseyin Akıllı | Levent Kavurmacıoğlu

Yayıncı:

Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar:

Enerji

Dergi:

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.6 Issue Ek Sayı, pp.555-566

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001305864

pISSN:

2687-3729