ANALISIS DISTRIBUSI KECEPATAN ALIRAN WIND TUNNEL TIPE TERBUKA ( VELOCITY DISTRIBUTION ANALYSIS OF OPEN JET WIND TUNNEL )

Hanifah, Siti and Handayani, Sri Utami (2015) ANALISIS DISTRIBUSI KECEPATAN ALIRAN WIND TUNNEL TIPE TERBUKA ( VELOCITY DISTRIBUTION ANALYSIS OF OPEN JET WIND TUNNEL ). Undergraduate thesis, D3 Teknik Mesin Fakultas Teknik.

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Abstract

Keseragaman aliran wind tunnel sangat penting terhadap hasil pengujian aerodinamika. Pengujian keseragaman aliran wind tunnel dengan menggunakan anemometer dianggap kurang teliti karena titik ujinya terbatas, yaitu disesuaikan dengan baling-baling anemometer. Oleh karena itu dilakukan pengujian dengan menggunakan pipa pitot karena pipa pitot memiliki diameter sisi masuk yang lebih kecil daripada anemometer, sehingga mampu menjangkau titik uji yang lebih banyak dan menghasilkan data yang lebih spesifik. Tujuan pelaksanaan tugas akhir ini adalah untuk mengetahui distribusi kecepatan aliran wind tunnel. Pengujian dilakukan di bagian outlet wind tunnel yang berukuran 45cm x 45cm, dengan jarak 2cm untuk setiap titik uji. Pengujian dilakukan pada 3 frekuensi yaitu 30 Hz, 40 Hz dan 50 Hz. Pengujian dilakukan dengan menggunakan pipa pitot yang disambungkan dengan manometer pipa U yang telah berisi premium. Berdasarkan hasil pengujian dan analisis data dapat disimpulkan bahwa, secara keseluruhan wind tunnel tipe terbuka tersebut belum bisa menciptakan aliran yang seragam dengan selisih perbedaan kecepatan tertinggi dan terendah adalah 2,34 m/s pada frekuensi 40 Hz dan frekuensi 50 Hz. Sedangkan pada frekuensi 30 Hz mendekati seragam dengan selisih perbedaan kecepatan tertinggi dan terendah adalah 1,34 m/s. Kata kunci : pipa pitot statis, manometer pipa U, aliran udara. Uniformity of the wind tunnel flow is very important for the result of the wind aerodynamics. The testing of uniformity wind tunnel flow with anemometer is considered not accurate because the point tests have to appropriate with the blades of anemometer and make it have a limited result. Therefore, the testing have to do again by using pitot static tube because it has a smaller inlet diameter than anemometer, so it can get an accurate and specific results than before. The aim of this project is to test the uniformity of the open jet wind tunnel flow. Test conducted in the outlet of wind tunnel with a dimension of 45cm x 45cm, and a distance of 2cm for each point test. The test conducted in 3 kinds of frequency, there are 30Hz, 40Hz and 50 Hz. It use the static pitot tube which connected with manometer U tube which contains premium. Based on the test results and the analysis of the data it can be concluded that, the fluid flow of the open jet wind tunnel is still not uniform and the difference between the highest and the lowest speed is 2,34 m/s at 40 Hz and 50 Hz frequency. The flow almost uniform at 30 Hz frequency with the velocity difference between the highest and the lowest is 1,34 m/s. Keywords : pitot static tube,manometer U tube, fluid flow

Item Type:Thesis (Undergraduate)
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Faculty of Engineering > Diploma in Mechanical Engineering
Faculty of Engineering > Diploma in Mechanical Engineering
ID Code:46939
Deposited By:Mrs Wahyu D3 Teknik Mesin
Deposited On:27 Nov 2015 11:01
Last Modified:25 Dec 2015 19:21

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