Araç Fren Sistemlerinin Isıl Performansının Parametrik Olarak İncelenmesi

Öz

Araçlarda yapılan ani fren sonucunda disk balata sistemlerinde ısınma ortaya çıkmaktadır. Özellikle yüksek sıcaklıklara ulaşıldığı zaman balata malzemesinde aşınma meydana gelebilir. Bu durum fren performansını olumsuz etkilemektedir. Bu çalışmada, disk balata sistemi Comsol programında üç boyutlu olarak modellenmiş ve zamana bağlı nümerik simülasyonlar yapılmıştır. Ani fren yapıldığı andaki disk balata ısınma süreci farklı araç hızları için (80, 100 ve 120 km/h) incelenmiştir. Aynı zamanda farklı disk malzemelerinin (dökme demir, paslanmaz çelik, karbon-karbon kompoziti) frenleme sürecindeki sıcaklık artışı belirlenmiştir. Bununla birlikte araç ağırlığının fren sistemi üzerindeki etkisi olup olmadığı tespit edilmiştir. Son olarak disk ve balata arasındaki sürtünme katsayısının ısınma sürecine etkisi nümerik olarak incelenmiştir. 

Anahtar Kelimeler

• Disk Fren Sistemi,Termal Analiz,Sıcaklık Dağılımı,Comsol

Parametric Investigation on Thermal Performance of Vehicle Brake Systems

Öz

As a result of the sudden brake in vehicles, heating is occurred in the disc brake systems. Especially, when high temperatures are reached, corrosion may occur in the brake pad. This situation affects the brake performance negatively. In this study, disc brake system was built three-dimensionally in Comsol program and time dependent numerical simulations were made. Disc brake heating when sudden braking is applied was investigated for different vehicle velocities (80, 100 and 120 km/h). At the same time, the temperature increase during the braking process was determined for different disk materials (cast iron, stainless steel, carbon-carbon composites). Also, it has been determined whether the vehicle weight is an effect on the brake system. Finally, the effect of friction coefficient between disc and pad on the heating process was investigated numerically. 

Anahtar Kelimeler

• Disc Brake System,Thermal Analysis,Temperature Distribution,Comsol

Kaynakça

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