Studi Numerik Aliran Melalui Square Duct Dan Square Elbow 90 Derajat Dengan Double Guide Vane Pada Variasi Sudut Bukaan Damper

Saputra, Gladhi Dwi (2016) Studi Numerik Aliran Melalui Square Duct Dan Square Elbow 90 Derajat Dengan Double Guide Vane Pada Variasi Sudut Bukaan Damper. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Saluran udara merupakan komponen penting untuk mensirkulasikan udara ataupun mengkondisikan udara pada suatu bangunan. Konstruksi saluran udara terdiri dari berbagai komponen, diantaranya yaitu damper , guide vane, elbow 90o, dan lain sebagainya. Sistem saluran udara dimana terdapat aliran fluida yang melintasi elbow 90o akan mengalami pressure drop lebih besar daripada melintasi saluran udara lurus dengan kecepatan free stream sama, sehingga akan terjadi kerugian energi lebih besar. Model uji yang digunakan dalam penelitian secara numerik ini berupa ducting dengan penampang square yang terdiri dari: upstream straight duct, square elbow 90o, downstream straight duct, serta dilengkapi aksesoris berupa double guide vane dan damper yang diletakkan pada jarak x/Dh=2 dari outlet elbow. Pengukuran parameter-parameternya dilakukan pada setiap cross section di sepanjang downstream straight duct. Pengujian dilakukan dengan variasi sudut bukaan damper. Dari penelitian ini diperoleh karakteristik aliran pada downstream dan nilai pressure drop yang terjadi pada setiap variasi. Dilihat dari bentuk profil kecepatan aliran hingga jarak 18 Dh belum menunjukkan recovery aliran pada bidang horizontal, hal ini dikarenakan hingga jarak 18 Dh masih terdapat aliran sekunder. Nilai pressure drop sangat dipengaruhi oleh damper. ================================================================================================================== Air duct is an important component to circulate air or air conditioning of a building. Construction of the air duct contained various components, among them are damper, guide vane, elbow 90o, and others. An air duct system in which contained fluid flow across a 90 ° elbow will occur pressure drop which greater than across straight air duct with same free stream velocity, so there will be loss of energy is greater. The test model used in the study are numerically in the form of ducting with a square cross-section consisting of: upstream straight duct, square elbow 90o, downstream straight duct, and are equipped with accessories such as double guide vane and damper which placed at a distance x/Dh = 2 from the outlet elbow. Measurement parameters are performed on every cross section which located along the downstream. straight duct. Testing was done by varying the damper opening angle. From this research, the characteristics of the flow in the downstream and the value of pressure drop in every variation. Judging from the shape of the flow velocity profile to a distance of 18 Dh , flow recovery has not shown on the horizontal plane, this is due to a distance of 18 Dh there is still a secondary flow. The pressure drop value is affected by the installation of dampers.

Item Type: Thesis (Undergraduate)
Additional Information: RSM 620.106 4 Sap s
Uncontrolled Keywords: Elbow 90 derajat; damper; pressure drop; profil kecepatan
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics.
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: ansi aflacha
Date Deposited: 23 Apr 2020 05:54
Last Modified: 23 Apr 2020 05:54
URI: http://repository.its.ac.id/id/eprint/75893

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