Yazar "Adatepe, Hakan" seçeneğine göre listele

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  • Küçük Resim
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    An experimental investigation on frictional behavior of statically loaded micro-grooved journal bearing
    (Elsevier Ltd., 2011) Adatepe, Hakan; Bıyıklıoğlu, Aydın; Sofuoğlu, Hasan
    Performances of plain and micro-grooved engine journal bearings were investigated in this study. Numerous experiments were performed under different static loads by using the purpose-built journal bearing test rig. Micro-grooves were made by cutting micro-channels both around and across the engine journal bearing surfaces. Stribeck curves for the micro-grooved and the plain journal bearings were then experimentally and theoretically generated while frictional torque versus angular velocity curves were also plotted. The results showed that the highest value of coefficient of friction as well as the frictional torque was obtained on the transversal micro-grooved journal bearings. (C) 2011 Elsevier Ltd. All rights reserved.
  • Küçük Resim
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    An investigation of tribological behaviors of dynamically loaded non-grooved and micro-grooved journal bearings
    (Elsevier, 2013) Adatepe, Hakan; Bıyıklığlu, Aydın; Sofuoğlu, Hasan
    Tribological performances of non-grooved and micro-grooved journal bearings were studied under dynamic loading. Numerous experiments were performed using purpose-built test rig and then simulated using various numerical methods. Friction force, friction coefficient, shaft center orbit, and film thickness were determined experimentally and numerically. The experimental and numerical results were in good agreement and the friction forces progressively increased on plain and circumferential, herringbone, and transversally micro-grooved bearing. The results show that it is necessary to complete detailed investigation about the tribological properties of the micro-grooved journal bearing by taking their shape, depth and operating condition into account. (C) 2012 Elsevier Ltd. All rights reserved.
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    Öğe
    Investigation of effects of oil additive on friction coefficient for statically loaded radial journal bearings
    (2013) Cengil, Mehmet; Adatepe, Hakan
    In this study, variation of friction coefficient under static loading on a radial journal bearing (Chrysler connecting rod bearing) is studied both theoretically and experimentally. The theoretical section of the study was conducted with the Kiss-SOFT program while the experimental part was conducted on a TM 290 hydrodynamic radial journal bearing experimental set. In this study we examine the effect of bearing loads and different proportion of poured additive in alkali-based lubrication oil on friction coefficient. Friction coefficient was calculated from the frictional torque. Consequently, theoretically calculated and experimentally tested friction coefficients were compared and the optimum oil additive ratio was determined.
  • [ X ]
    Öğe
    Investigation of effects of the rotational speeds on performance of a dynamically loaded journal bearing
    (2011) Adatepe, Hakan
    In this study connecting rod journal bearing performance of the Ruston and Hornsby 4-cycle diesel engine was investigated under three different engine speeds (500,1500 and 2500 rpm). It was investigated how do the minimum journal bear-ing clearance, peak oil film pressure, friction torque, oil flow rate, journal orbit and the power losses on the dynamically loaded connecting rod bearing vary as the speed increases. Variations of the parameters affecting journal bearing per-formance with respect to the increase in engine speed are shown graphically.
  • Küçük Resim
    Öğe
    Statik yük altındaki kaymalı yataklarda sürtünme katsayısının teorik ve deneysel olarak belirlenmesi
    (Makine Teknolojileri Elektronik Dergisi, 2012) Adatepe, Hakan; Cengil, Mehmet; Güneş, Birol
    Bu çalışmada, statik yük altındaki bir radyal kaymalı yatakta (Chrysler biyel kolu yatağının) sürtünme katsayısı değişimi, teorik ve deneysel olarak belirlenmiştir. Çalışmanın teorik kısmında; yatak yükünün, yatak boşluğunun ve yağ viskozitesi değişiminin sürtünme katsayısına etkisi incelenmiştir. Deneysel kısımda ise; sürtünme momentine yatak parametrelerinin etkisi TM 290 hidrodinamik radyal kaymalı yatak deney setinden ölçülmüştür. Ölçülen sürtünme momentinden, sürtünme katsayısı hesaplanmıştır. Sonuç olarak teorik ve deneysel olarak belirlenen sürtünme katsayıları karşılaştırılmıştır.