Analisa momen puntir poros turbocharger ABB tipe VTR 354 akibat fenomena surging

Istiqomah, . (2017) Analisa momen puntir poros turbocharger ABB tipe VTR 354 akibat fenomena surging. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Surging merupakan suatu fenomena dimana adanya aliran balik udara yang menuju sisi compressor. Kejadian tersebut dapat ditandai dengan bunyi atau getaran yang berlebih pada turbocharger. Penyebab utama surging dapat dikelompokkan menjadi dua, yaitu kegagalan atau kelalaian dalam pengoperasian dan kesalahan desainer saat pemilihan turbocharger. Penelitian ini akan membahas tentang pengaruh surging terhadap momen puntir poros turbocharger ABB tipe VTR 354 pada engine Niigata 8MG40X. Metode yang digunakan berbasis Finite Element Method. Diawali dengan penetapan torsi compressor, torsi turbine, menyiapkan model poros turbocharger serta simulasi dengan SolidWorks. Dari hasil penelitian, diperoleh bahwa daerah kritis yang disebabkan oleh surging terletak pada compressor seat. Selisih torsi terbesar saat engine load 50% yaitu -1.304 Nm dengan nilai tegangan maksimum 0.015906 Mpa. Sedangkan displacement yang terjadi sebesar 0.0000270028 mm dan maksimum regangannya yang dihasilkan adalah 6.26693e-008 mm/mm. Dengan demikian, material poros 17NiCrMo6-4 dianggap dapat menghadapi surging pada turbocharger tersebut. =========================================================================================== Surging is a phenomenon in which the airflow back toward of the compressor side. This case can be known by excessive sound or vibration in the turbocharger. The main cause of surging phenomenon may divided into 2 types, that is failure operation by crewa and wrong selection turbocharger by their designer. In this research will discuss about the effect of surging on twisting moment of turbocharger shaft ABB type VTR 354 on Niigata 8MG40X engine. The used method is based on Finite Element Method. Start from determine the compressor and turbine torque, preparing the turbocharger shaft and simulation with SolidWorks. From these research, it is found that critical area caused by surging is located on compressor seat. The biggest torque difference at engine load 50% that is -1.304 Nm with the value of maximum stress is 0.015906 Mpa. While its displacement 0.0000270028 mm and the maximum strain is 6.26693e-008 mm/mm. Thus, the shaft material 17NiCrMo6-4 is considered capable of dealing with surging on the turbocharger.

Item Type: Thesis (Undergraduate)
Additional Information: RSSP 621.406 Ist a
Uncontrolled Keywords: surging, momen puntir, poros turbocharger
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User: Istiqomah . .
Date Deposited: 26 Oct 2017 07:04
Last Modified: 05 Mar 2019 07:37
URI: https://repository.its.ac.id/id/eprint/48012

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