Radyal Havalı Yataklarda Basınç Dağılımının Nümerik Analizinde Çözüm Parametrelerinin ve Silindirik Grid Birleşiminin Etkileri

Abdurrahim DAL, Tuncay KARAÇAY
531 96

Öz


Basınçlı hava yatakları ile desteklenmiş yatak-rotor sisteminde, yatak ve rotor arasındaki havanın akışı yatak-rotor sisteminin dinamiğini doğrudan etkilemektedir. Bu akışın modellenmesi ve modelin çözümü basınçlı hava yatakları için oldukça önemlidir. Havanın akışı Reynold’s denklemi ile modellenmekte ve nümerik çözüm metotları kullanılarak yatak ve rotor arasındaki basınç dağılımları hesaplanmaktadır. Basınç dağılımının elde edilmesi için kullanılan yöntemlerden bir tanesi de Değişen Yönlü Kapalı Nümerik İntegrasyon yöntemidir. Ancak bu metotta özellikle yatak ve rotor arasındaki boşluk miktarının artması (c>100 µm) ile birlikte ıraksama problemleri ortaya çıkmaktadır. Bu çalışmada, büyük boşluk değerlerine sahip basınçlı hava yatakları için (c=250 µm'ye kadar) zaman adımı, grid boyutları ve yakınsama kriteri gibi nümerik çözüm parametrelerinin ve silindirik grid birleşiminin yatak ve rotor arasındaki basınç dağılımına etkileri araştırılmıştır.

Anahtar kelimeler


Basınçlı hava yatakları; Reynold’s denklemi; Değişen yönlü kapalı nümerik integrasyon metodu

Tam metin:

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