ÜÇ BOYUTLU EULER/NAVİER-STOKES DENKLEMLERİ İÇİN ÇOK BLOKLU YAPISAL AĞLI ÇÖZÜCÜ GELİŞTİRİLMESİ VE DOĞRULANMASI

Bu çalışmada üç boyutlu Euler-Navier Stokes denklemleri için çok boyutlu yapısal ağlı bir çözücü geliştirilmiştir. Çözücü, denklem çözümleri için sonlu farklar metodu ve yukarı-aşağı yaklaşık çarpanlarına ayırma algoritması kullanmaktadır. Çok bloklu yapısal ağ kullanımı ise algoritmanın kompleks geometriler için kullanımına olanak sağlamaktadır. Geliştirilen çözücünün doğruluğu, daha önce deneysel olarak test edilen tek motor arka gövde etkileşimi sonuçlarıyla karşılaştırılmıştır. Geliştirilen çözücünün kullanımıyla elde edilen sayısal veriler, deneysel verilerle uyumluluk gösterdiğinden, geliştirilen çözücünün akış fiziğini yeteri kadar temsil edebildiği gösterilmiştir.

Anahtar Kelimeler:

Euler çözücü, çok bloklu çözücü, yukarı-aşağı yaklaşık çarpanlarına ayırma

DEVELOPMENT AND VERİFİCATİON OF A MULTİBLOCK STRUCTURED GRİD SOLVER FOR 3D EULER/NAVİER-STOKES EQUATİONS

A multiblock structured grid solver for 3D Euler/Navier-Stokes equations is developed in this study. The solver employs the finite difference method together with the lower-upper factored scheme to provide fast solutions, while the use of multiblock structured grids allows the algorithm to be applied to complex geometries. The developed solver is then tested on a "body-only" axisymmetric model with a single-engine fighter aft-end which was previously investigated experimentally. The numerical results of the pressure distributions on the model's body obtained by the solver are compared to the experimental results. The numerical and experimental results were found to be in good agreement, indicating that the solver can sufficiently solve the flow equations, and represent the physical properties of the flow.

Keywords:

Euler solver, multiblock solver, LU-ADI,

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