Zamana bağlı sıkıştırılamaz kavite akışının aeroakustik analizi

Bu çalışmada, 2 ve 3 boyutlu kavite profili boyunca sıkıştırılamaz, zamana bağlı akış alanı ve aerodinamik kaynaklı aeroakustik gürültü incelenmiştir. 2 boyutlu akış alanının çözümünde türbülans modeli olarak Standart k-?, Standart k-? ve SST k-? kullanılırken, 3 boyutlu çözümlerde Standart k-? modeli ile hesaplama alanı çözülmüştür. Düşük Reynolds ve Mach Sayısı için kavite içi ve çevresindeki hesaplanan akış alanı sonuçları deneysel çalışmalar ile karşılaştırılarak doğrulanmıştır. Hem 2 boyutlu hem de 3 boyutlu akış alanına ait zamana bağlı değişkenler, Ffowcs William-Hawkings (FW-H) Akustik Analoji yaklaşımı kullanılarak kavite gürültüsü hesaplanmıştır. 3 boyutlu kavite için,geçişli iç yüzey yaklaşımı kullanılarak quadrapol teriminin aeroakustik gürültü sonuçlarına etkisi gösterilmiştir

Aeroacoustics investigation of unsteady incompressible cavity flow

In this study, unsteady incompressible flow field and aerodynamically generated noise of 2D and 3D cavity flows are investigated. In the case of 2D flow fields, standard k-?, standard k-? and SST k-? is used and in the 3D case, flow field is computed using standard k-? turbulence model. All numerical results are compared and validated with experimental measurement for Low Reynolds and Mach numbers. All unsteady flow fields results are used to compute a cavity noise using Ffowcs William - Hawking (FW-H) Acoustics Analogy. In the case of 3D cavity, the effect of quadrapole terms on the aerodynamically generated noise is investigated defining permeable interior surface.

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