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Design and development of water tunnel for flow visualization study on micro-hydrokinetic turbine

Design and development of water tunnel for flow visualization study on micro-hydrokinetic turbine / Tong Poh Eng
Terowong air adalah satu kemudahan eksperimen yang digunakan untuk menguji tingkah laku hidrodinamik badan terendam dalam air yang sedang mengalir atau dalam statik. Terowong air boleh direkabentuk dan dibangunkan untuk memvisualisasikan pelbagai jenis aliran. Salah satu keupayaannya adalah untuk menggambarkan tingkah laku hidrodinamik aliran ke atas objek dan struktur yang berlainan dengan itu mengkaji fenomena lapisan sempadan. Bagi projeck ini, model mikro hidrokinetik turbin akan diletakkan di bahagian uji terowong air untuk memvisualisasikan dan mengkaji kelakuan hidrodinamilk aliran di sekitar model tersebut. Oleh itu, satu terowong air yang bermampuan untuk mensimulasikan keadaan halaju aliran sungai Malaysia (0 – 0.6 𝑚𝑠−1) untuk model mikro hidrokinetik turbin yang diuji dengan julat halaju aliran air purata yang dijana dari 0 - 0.7957 𝑚𝑠−1 dalam bahagian ujian dimensi 0.25𝑚 × 0.25𝑚 × 0.85𝑚(W × H × L) telah direka dan dibuatan dengan sisihan maksimum purata halaju aliran air merentasi bahagian ujian dengan 3.43% sahaja. Kriteria reka bentuk komponen terowong air juga dibincangkan dalam tesis ini. Dari analisis kuantitatif terowong air, konfigurasi terbaik komponen terowong air untuk projek ini terdiri daripada komponen panduan aliran masuk, panduan aliran keluar, sistem penyaman aliran dan skrin. Tahap keamatan turbulensi profil halaju di bahagian ujian terowong air bermampuan untuk mencapai tahap pergolakan yang rendah (9.66%) pada halaju aliran air 0.3440 𝑚𝑠−1. Di samping itu, sistem suntikan pewarna juga direka untuk menvisualisasikan tingkah laku hidrodinamik aliran air sekitar model mikro hidrokinetik turbin dalam terowong air yang direka dan dilakukan pada halaju air air 0.0250 𝑚𝑠−1. Pewarna merah biru didapati mempunyai tahap kontras yang lebih tinggi berbanding dengan air dan pewarna kuning. Mereka mampu menvisualisasikan kelakuan hidrodinamik aliran air sekitar model mikro hidrokinetik turbin dengan gambar qualiti yang tinggi. _______________________________________________________________________________________________________ A water tunnel is an experimental facility utilized for testing the hydrodynamic behavior of submerged bodies in flowing water. Water tunnel can be designed and developed to visualize a wide range of flow and one of its ability is to visualize the flow behavior over different objects and structures hence studying the phenomenon of boundary layer such as the vortex induced, flow separation, turbulence and the others. For the current project, a micro-hydrokinetic turbine model is to be placed in the test section of the water tunnel to visualize and study the flow behavior around the model. Hence a water tunnel that capable to mimic and simulate the Malaysia river flow velocity conditions (0 – 0.6 𝑚𝑠−1) for the micro-hydrokinetic turbine model to be tested with generated range of mean water flow velocity of 0 – 0.7957 𝑚𝑠−1 at the test section of dimension of 0.25𝑚 × 0.25𝑚 × 0.85𝑚 (W × H × L) is designed, developed, fabricated and analyzed with maximum deviation of mean water flow velocity across the test section with 3.43% only. The design criteria of the components of the water tunnel are discussed in this thesis as well. From the quantitative analysis of the water tunnel, the best configuration of the components of the water tunnel consisting the components of inlet flow guide, exit flow guide, flow conditioning system and screen. The turbulence intensity level of the velocity profiles at the test section capable to reach low turbulence level (9.66%) at the mean water velocity of 0.3440 𝑚𝑠−1. In addition, dye injection system is also designed and developed as the flow visualization technique to visualize the flow structures around the micro-hydrokinetic turbine model in the water tunnel designed and developed. The flow visualization experiment is conducted at mean water velocity of 0.0250 𝑚𝑠−1. The red dyes and blue dyes are founded have higher contrast level compare with both the water and yellow dyes. They capable to produce high pictorial representation of the flow behavior around the micro-hydrokinetic turbine model.
Contributor(s):
Tong Poh Eng - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875007953
Language:
English
Subject Keywords:
water; tunnel; hydrodynamic
First presented to the public:
6/1/2018
Original Publication Date:
10/29/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Aerospace Engineering
Citation:
Extents:
Number of Pages - 119
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-10-29 17:15:36.327
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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Design and development of water tunnel for flow visualization study on micro-hydrokinetic turbine1 2018-10-29 17:15:36.327