Perde Tipi Engellerin Gözenek Oran ve Konumlarının Çalkantıyı Sönümleme Etkisinin Sayısal Olarak İncelenmesi

Abstract

Bu çalışmada farklı gözenek oranına sahip perdelerin çalkantıyı sönümleme etkisi sayısal olarak incelenmiştir. Sayısal modelde perdeler tankın her iki yanal yüzeyine yerleştirilmiş ve salınım hareketine zorlanmıştır. Perdeler için serbest su yüzeyinde, altında ve üstünde olarak üç farklı konum belirlenmiştir. Her bir perde için, serbest su yüksekliğinde okunan basınç değerleri ile akışkan serbest yüzey deformasyonu zamana bağlı olarak karşılaştırılmıştır. Çalışma sonucunda tank yanal yüzeylerine uygulanan perdelerin, yüzey deformasyonunu azaltarak serbest su seviyesinde çalkantı kuvvetlerini düşürdüğü gösterilmiştir. Perdelerin basınç sönümleme oranları karşılaştırıldığında, en iyi oranın gözeneksiz perde olduğu belirtilerek. Serbest su yüzeyine yakın perde yerleşiminin basınç sönümlemede daha etkili olduğu tespit edilmiştir. Ancak gözenekli perdelerin sönüm oranı katı perdeye yakın olduğu, tanka daha az yük getireceği için bu tip perdenin uygunluğu vurgulanmıştır.

Keywords

• sönümleyici perde
• çalkantı yükleri
• nümerik çalışma
• dikdörtgen tank.

Numerical Investigation of solidity rate and position of baffles efficiency on damping sloshing

Abstract

In this study, the effect of baffle solidity in a partially filled rectangular tank on sloshing was investigated numerically. In the numerical model, the baffles are located on both lateral surfaces of the tank and are forced into oscillating motion. Three different positions were determined for the baffles as free water surface, below and above. For each baffles cases, the pressure values are measured at the free surface level and the free surface deformation of the fluid were compared. The results of the study showed that it reduces the pressures at the free surface level by decaying the surface deformation with applying baffles to the lateral tank walls. When the pressure damping ratios of the baffles are compared, it is seen that the best damping ratio is measured by using the solid baffles. In addition, it has been determined that the baffles placements closed to the free water surface was more effective in pressure damping. However, the better applicable of perforated baffles are emphasized because the damping rates are close to the solid baffles and it will bring less load to the tank.

Keywords

• baffles
• sloshing loads
• numerical study
• rectangular tank.

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