2012

Düz Yüzey Üzerine Çarpan Eğik Jetin Akış ve Isı Transferi Karakteristikleri

Yatay düz bir yüzeye çarpan türbülanslı eğik jetlerin etkileri, akış alanı ve ısı transferi özellikleri bakımından sayısal olarak incelenmiştir. Çalışmada, sabit ısı akısına sahip bir yüzeyde ısı transferini etkileyen eğik jet çarpmasının akış karakteristiklerine etkisinin gösterilmesi amaçlanmıştır. Farklı boyutsuz jet-plaka mesafeleri (2 < H/D < 8), jet eğim açıları (45° < α < 90°) ve Reynolds sayıları (1500 < Re < 30000) için simülasyonlar gerçekleştirilmiştir. Isı transferi ve akış karakteristikleri, sıcaklık konturları ve hız vektörleri kullanılarak irdelenmiştir. Simülasyon sonuçları literatürde yer alan deneysel veriler ile doğrulanmış ve oldukça iyi bir uyum sağlanmıştır. Jet eğim açısının azaltılması ile birlikte maksimum ısı transferinde azalmanın olduğu sonuçlardan görülmüştür. Maksimum Nusselt sayısının durma noktası Nusselt sayısına oranı jet eğim açısının artması ile birlikte artmaktadır.

Flow and heat transfer characteristics of inclined jet impingement on a flat plate

The effects of a turbulent inclined jet impinging on a horizontal flat surface were investigated numerically with respect to the flowfield and heat transfer characteristics. Main purpose of the study was to show the effects of inclined jet impingement on flowcharacteristics, which affects the heat transfer on a surface with a constant heat flux. Simulations were performed for differentdimensionless jet-to-plate distances (2 < H/D < 8), inclination angle of the jet (45° < α < 90°), and Reynolds number (1500 < Re

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