Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation
Yıl: 2020 Cilt: 22 Sayı: 64 Sayfa Aralığı: 259 - 269 Metin Dili: İngilizce DOI: 10.21205/deufmd.2020226425 İndeks Tarihi: 30-10-2020
Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation
Öz: Flow along a cavity is of special interest for researchers due to the occurrence of free shear layer flowand related high levels of sound and pressure forces. In this study, turbulent flow along an open cavityat a low inlet Mach number (Ma = 0.034) is modelled by Large Eddy Simulations (LES). The velocityprofiles at various stations inside the open cavity are compared to available experimental data. It isfound that LES results agree with experimental data and detects the transient pressure change in theflow field satisfactorily. Transient pressure data in the flow field is evaluated in acoustic analogy. Thenoise generated by the cavity is compared with the established Rossiter modes and is found to bereasonable. To create an effect on the sound pressure levels (SPL), a small obstacle with quadrilateralcross section is immersed in the shear layer at three different locations. This causes that the SPL peaksare reduced compared to the case without any obstacle. Thus, cavity-induced noise form specificfrequencies are redistributed to high frequency broadband noise as a result of this passive flowcontrol method.
Anahtar Kelime: Zamana Bağlı Kavite Akışı Aeroakustiğinin Büyük Girdap Simülasyonu ile Sayısal Olarak İncelenmesi
Öz: Bir kavite boyunca akış, serbest kayma tabakası akışının oluşması ve buna bağlı olarak yüksek seviyelerde ses ve basınç kuvvetleri nedeniyle araştırmacılar için özel bir ilgi alanı oluşturmaktadır. Bu çalışmada, düşük Mach sayısındaki (Ma = 0.034) açık bir kavite boyunca türbülanslı akış Büyük Girdap Simülasyonları (LES) ile modellenmiştir. Açık kavite içindeki çeşitli konumlardaki hız profilleri, mevcut deneysel verilerle karşılaştırılmıştır. LES sonuçlarının deneysel verilerle uyuştuğu ve akış alanındaki zamana bağlı basınç çalkantılarını tatmin edici şekilde tespit edebildiği bulunmuştur. Akış alanındaki bu basınç verileri akustik analojide değerlendirilmiştir. Kavitenin ürettiği gürültü, Rossiter modlarıyla karşılaştırılmış ve makul seviyede bulunmuştur. Ses basıncı seviyeleri (SPL) üzerinde bir etki yaratmak için, kesme katmanına üç farklı noktada dörtgen kesitli küçük bir engel daldırılmıştır. Bu, herhangi bir engel olmadığı duruma kıyasla SPL doruklarının azalmasına neden olmaktadır. Bu nedenle, kavite kaynaklı gürültüye özgü frekanslar, bu pasif akış kontrol yönteminin bir sonucu olarak yüksek frekanslı geniş bant gürültüsüne yeniden dağıtılır.
Anahtar Kelime: Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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| APA | COŞKUN F, Cadirci S (2020). Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. , 259 - 269. 10.21205/deufmd.2020226425 |
| Chicago | COŞKUN Furkan,Cadirci Sertac Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. (2020): 259 - 269. 10.21205/deufmd.2020226425 |
| MLA | COŞKUN Furkan,Cadirci Sertac Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. , 2020, ss.259 - 269. 10.21205/deufmd.2020226425 |
| AMA | COŞKUN F,Cadirci S Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. . 2020; 259 - 269. 10.21205/deufmd.2020226425 |
| Vancouver | COŞKUN F,Cadirci S Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. . 2020; 259 - 269. 10.21205/deufmd.2020226425 |
| IEEE | COŞKUN F,Cadirci S "Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation." , ss.259 - 269, 2020. 10.21205/deufmd.2020226425 |
| ISNAD | COŞKUN, Furkan - Cadirci, Sertac. "Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation". (2020), 259-269. https://doi.org/10.21205/deufmd.2020226425 |
| APA | COŞKUN F, Cadirci S (2020). Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi, 22(64), 259 - 269. 10.21205/deufmd.2020226425 |
| Chicago | COŞKUN Furkan,Cadirci Sertac Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi 22, no.64 (2020): 259 - 269. 10.21205/deufmd.2020226425 |
| MLA | COŞKUN Furkan,Cadirci Sertac Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi, vol.22, no.64, 2020, ss.259 - 269. 10.21205/deufmd.2020226425 |
| AMA | COŞKUN F,Cadirci S Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi. 2020; 22(64): 259 - 269. 10.21205/deufmd.2020226425 |
| Vancouver | COŞKUN F,Cadirci S Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi. 2020; 22(64): 259 - 269. 10.21205/deufmd.2020226425 |
| IEEE | COŞKUN F,Cadirci S "Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation." Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi, 22, ss.259 - 269, 2020. 10.21205/deufmd.2020226425 |
| ISNAD | COŞKUN, Furkan - Cadirci, Sertac. "Numerical Investigation of Unsteady Cavity Flow Aeroacoustics by Large Eddy Simulation". Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi 22/64 (2020), 259-269. https://doi.org/10.21205/deufmd.2020226425 |
