Hızlandırılmış Erozyon Testleriyle Malzemelerin Kavitasyon Erozyonu Özelliklerinin İncelemesi

Yıl 2019, Cilt , Sayı 216, 32 - 49, 30.12.2019

Onur USTA

Öz

Bu çalışmada, kavitasyon ve kavitasyonun en olumsuz ve zararlı etkilerinden birisi olan kavitasyon erozyonunun deneysel olarak incelenmesi sunulmaktadır. Bu bağlamda, kavitasyon erozyonu oluşumu açıklanmış ve erozyon testlerinde kullanılan bazı matematiksel parametreler; kavitasyon sayısı, erozyon hızı ve erozyon şiddeti incelenmiştir. Farklı malzemelerin kavitasyon erozyonuna karşı dirençlerini test etmede kullanılan beş farklı yöntem bulunmaktadır. Bunlar en basitinden en gelişmiş olana doğru sıralanırsa, döner diskli cihaz ile gerçekleştirilen testler, titreşim cihazları ile ultrasonik ortam oluşturularak gerçekleştirilen testler, hava jeti tekniği, su jeti (kavitasyon jeti) tekniği ve kavitasyon tüneli testleridir. Çalışma kapsamında bu beş teknik incelenerek literatürden elde edilen örneklerle anlatılmıştır. Hava jeti tekniği ve su jeti tekniğine özel ilgi gösterilmiş, çalışma kapsamında İTÜ Gemi İnşaatı ve Deniz Bilimleri Fakültesi’nde kurulan hava jeti ve su jeti deney düzenekleri ile gerçekleştirilen testlerden örnekler sunulmuştur.

Anahtar Kelimeler

Kavitasyon erozyonu testi, kavitasyon sayısı, ASTM G134 STANDARTLARI, su jeti test tekniği

Kaynakça

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