Studi Numerikal Pengaruh Modifikasi Ducting Inlet Primary Air Pulverizer Terhadap Distribusi Aliran Udara Dan Konsentrasi Keausan

Wening Galih, R.Panji Satrio (2022) Studi Numerikal Pengaruh Modifikasi Ducting Inlet Primary Air Pulverizer Terhadap Distribusi Aliran Udara Dan Konsentrasi Keausan. Masters thesis, Institut Teknologi Sepuluh November.

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Abstract

Penelitian ini menyelidiki pengaruh pemasangan beberapa model diffuser di saluran masuk pulverizer ZGM123-GII pada karakteristik aliran udara dan konsentrasi keausan. Hasil pemeriksaan internal menemukan bahwa area dinding dan komponen di sekitarnya aus secara tidak normal atau lebih cepat dari biasanya. Kondisi ini akan mempengaruhi ketersediaan atau kesiapan pulverizer.
Ada 6 variasi model yang digunakan dalam penelitian untuk menyelesaikan masalah ini. Variasi jumlah blade yaitu 2 blade dan 3 blade digabung dengan 3 variasi sudut yaitu 30 derajat, 45 derajat, dan 50 derajat. Dalam penelitian ini, viscous model k-omega SST digunakan untuk mensimulasikan aliran udara primer dari inlet ducting menuju area di atas throat ring.
Hasil penelitian menunjukkan kontur kecepatan udara dan vektor kecepatan pada pulverizer. Model dengan sudut 45 derajat dan jumlah 3 blade, sudah mampu mensirkulasikan udara secara dominan di sisi kiri ducting saluran masuk udara primer sesuai dengan rekomendasi studi referensi. Dari semua variasi, model sudut 45 derajat dengan 3 blade dan sudut 50 derajat dengan 3 blade diketahui mampu mengatasi masalah konsentrasi keausan. Hal ini dikarenakan pada model tersebut sudah tidak ditemukan indikasi adanya konsentrasi keausan dimana karakteristiknya didapatkan dari grafik nilai distribusi kecepatan pada area throat ring.
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This paper investigates the effect of installing several diffuser models in the pulverizer ZGM123-GII inlet ducting on air flow characteristics and wear concentration. Results of the internal check found that an area of the wall and the surrounding components were wearing abnormally or faster than usual. This condition will affect the availability of the pulverizer.
There are 6 variations model used in this study to solve this problem. The 2 variations in the number of blade, there are 2 and 3 blades, combined with 3 angle variations, namely 30 degrees, 45 degrees, and 50 degrees. In this study, the viscous k-omega SST model was used to simulate airflow from the primary inlet to the area above the throat ring.
The results show the contours of velocity of the air and the velocity vector on the pulverizer. Model with an angle of 45 degrees and the number of blade 3, is able to circulate air dominantly on the left side of the primary air inlet ducting, according to the reference study. From all variations, the model 45 degrees angle with 3 blades and 50 degree angle with 3 blades are able to overcome the wear concentration problem. This is because the model has no indication of wear concentration where the characteristics are obtained from the graph of the velocity distribution value in the throat ring area.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Pulverizer, Keausan Material, CFD Modelling, Diffuser, Material Wear
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	R.PANJI SATRIO WENING GALIH
Date Deposited:	14 Feb 2022 07:07
Last Modified:	14 Feb 2022 07:07
URI:	http://repository.its.ac.id/id/eprint/93797

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