Wahyujati, Azis Hardianto and Fandinuari, Hermawan (2015) Visualisasi makro instabilitas pola alir serta pengukuran pumping capacity dan mixing time dalam tangki berpengaduk dengan side entering impeller. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengetahui karakteristik
pola alir dan makro instabilitas dengan menggunakan video
camera, serta waktu pencampuran (mixing time) yang terjadi
dalam reactor berpengaduk menggunakan side entering impeller
secara eksperimen .
Berdasarkan penelitian yang berkembang, penggunaan
side-entering impeller belum banyak diteliti sehingga fenomena
yang terjadi pada sistem pencampuran tersebut seperti pola alir
dan makro instabilitas belum banyak diketahui. Dengan
menggunakan video camera dapat terlihat vektor, kontur, dan
pola aliran yang terbentuk dari distribusi partikel padat dalam
campuran.
Performa pengadukan dapat diindikasikan dari waktu
pencampuran (Mixing Time). Mixing time mengindikasikan
seberapa lama waktu yang dibutuhkan oleh pengadukan untuk
mencapai larutan yang homogen. Dengan pengukuran pH
(derajat keasaman melalui penambahan zat asam dapat diketahui
waktu sampai pH mencapai nilai konstan. Perubahan waktu dari
pH awal sampai pH konstan ini adalah mixing time.
Peralatan yang digunakan terdiri dari tangki silinder, 6
pitch blade turbine, 4 pitch blade turbine, poros impeller dan motor. Karena dalam penelitian ini digunakan teknik visualisasi
untuk mempelajari pola aliran dalam tangki berpengaduk dengan
side entering impeller, maka tangki silinder dikelilingi oleh tangki
kotak.
Dari hasil penelitian yang telah dilakukan, didapatkan
bahwa semakin tinggi tinggi liquida maka variasi pola alir akan
semakin sedikit. Semakin banyak jumlah daun impeller maka
variasi aliran akan semakin berkurang, namun life time pola alir
yang terjadi lebih lama. Semakin besar kecepatan pengadukan,
diameter impeller, dan semakin banyak jumlah blade maka
mixing time akan semakin berkurang. Semakin banyak jumlah
blade, maka pumping capacity semakin besar.
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The purpose of this research to determine the
characteristic of flow patterns, macro instability by visualization
based on video camera, and mixing time in agigated tank with
side-entering impeller.
During this studies, side-entering agitated tank very
rarely use more often based on simulations and experiment that
require a lot of cost. The phenomena such as flow pattern and
macro instability is not yet known. By using a video camera, the
analysis of systems involving fluid flow, heat transfer, and other
related phenomena sucha as chemical reactions can be very
aesthetically vector and contour of the flow pattern which is
formed from the distribution of solid particle in the mixture.
Mixing performance can be determined by measuring
mixing time. Mixing time is the time which is required by
blending process to achieve level homogenity of some
mixture.This can be measured by adding acid solution, and
measuring the time that is required to achieve constant pH meter
reading.
The equipment used consisted of a cylindrical tank, 6
pitch blade turbine, 4 pitch blade turbine, impeller shaft, and the
motor. Because this study used visualization techniques to study
flow patterns in stirred tank with a side entering impeller, then
the cylindrical tank surrounded by boxes. From the research that has been done, it can be found
that the greater weight of liquid inside the vessel, the variation of
flow pattern become decrease. As the impeller diameter become
greater the variation of flow pattern also greater. The number of
blade is inversely proportional to the variation of flow patterm.
But the greater number of blade, the life time of each flow pattern
become greater. Mixing time is inversely proportional to
rotational speed, impeller diameter, and the number of blades.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSK 620.106 4 Wah v |
| Uncontrolled Keywords: | Side-entering, Tangki Berpengaduk, Impeler,Waktu Pencampuran |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics. Tubes--Fluid dynamics |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering > 24201-(S1) Undergraduate Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 05 Apr 2019 04:06 |
| Last Modified: | 05 Apr 2019 04:06 |
| URI: | http://repository.its.ac.id/id/eprint/62702 |
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