ZAMANA BAĞLI SIKIŞTIRILAMAZ KAVİTE AKIŞININ AEROAKUSTİK ANALİZİ

Year 2016, Volume: 31 Issue: 3, 0 - 0, 06.09.2016

Baha Zafer Furkan Çoşgun

https://doi.org/10.17341/gummfd.34239

Abstract

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-ε, k-ω ve SST k-ω kullanılırken, 3 boyutlu çözümlerde ise k-ω 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 zaman bağlı değişkenler, Ffowcs William-Hawkings (FW-H) Akustik Analoji yaklaşımı kullanılarak kavite gürültüsü hesaplanmıştır. 3 boyutlu kavite için, geçişli iç yüzey yaklaşımı kullanılarak quadrapol terimlerinin aeroakustik gürültü sonuçlarına etkisi gösterilmiştir.

Keywords

Kavite Akışı, Aeroakustik; Düşük Reynolds Sayısı; Akustik Analoji

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