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Airfoil with membrane at low reynolds number

Airfoil with membrane at low reynolds number / Abdul Qayyum Roslan
Dalam projek ini, satu eksperimen telah dijalankan untuk mengkaji prestasi aerodinamik pada NACA 2412. Aerofoil tersebut dibahagikan kepada dua bahagian iaitu airfoil dengan membran fleksibel dan aerofoil tegar. Aerofoil tersebut direka dengan menggunakan aluminium. Lembaran getah perubatan digunakan sebagai membrane fleksibel. Dengan menggunakan membran yang fleksibel, aerofoil mempunyai keupayaan untuk menyesuaikan diri dengan arus masuk dengan menukar camber mereka secara automatik, dengan itu mengimbangi perbezaan tekanan pada bahagian atas dan bawah aerofoil untuk mengurangkan pemisahan aliran. Aerofoil telah diuji dalam terowong angin. Halaju aliran udara adalah 6m/s, 9m/s, 12m/s dan 15m/s. Ujian ini dijalankan dengan sudut serangan dari -5 darjah hingga 25 darjah. Bahagian aerofoil mempunyai kord 10 cm dan panjang 30cm. Kawasan permukaan adalah 0.03-meter persegi. Deskripsi terperinci mengenai reka bentuk eksperimen, fabrikasi, persediaan dan ujian disertakan dalam tesis. Data dianalisis menggunakan perisian PCD30A. Hasilnya menunjukkan bahawa aerofoil dengan fleksibel membran fleksibel mempunyai prestasi aerodinamik yang lebih baik berbanding dengan aerofoil tegar. Hasilnya menunjukkan bahawa aerofoil dengan fleksibel membran fleksibel mempunyai prestasi aerodinamik yang lebih baik berbanding dengan aerofoil tegar. Aerofoil membrane fleksibel menghasilkan kecekapan aerodinamik yang paling tinggi iaitu 17.27. Aerofoil membran fleksibel menghasilkan koefisien daya angkat maksimum dan sudut stall yang lebih tinggi berbanding dengan aerofoil tegar. _______________________________________________________________________________________________________ In this project, an experiment was carried out to study the aerodynamic performance on NACA 2412. The airfoil is divided into two parts which are airfoil with flexible membrane and rigid airfoil. The airfoils were fabricated using aluminium. A medical rubber sheet was used as the flexible membrane. By using flexible membrane, the airfoils have the ability to adapt to the incoming flows by changing their camber automatically, thus balancing the pressure differences on the upper and lower part of the airfoils to reduce the flow separation. The airfoils were tested in a wind tunnel. The velocities of the air flow are 6m/s, 9m/s, 12m/s and 15m/s. The test was carried out with angles of attack ranging from -5 degree to 25 degree. The airfoil section has a chord of 10cm and length of 30cm. The surface area is 0.03 square metre. Detailed descriptions of the experimental design, fabrication, setup and testing are included in the thesis. The data was analysed using PCD30A software. The results show that airfoil with flexible membrane has the better aerodynamic performance compared to the rigid airfoil. Airfoil with flexible membrane produces the highest aerodynamic efficiency which is 17.27. Flexible membrane airfoil also produces higher maximum lift coefficient and higher stall angle compared to rigid airfoil.
Contributor(s):
Abdul Qayyum Roslan - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875008158
Language:
English
Subject Keywords:
aerodynamic; NACA 2412; airfoil
First presented to the public:
6/1/2019
Original Publication Date:
7/9/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Aerospace Engineering
Citation:
Extents:
Number of Pages - 67
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-07-09 15:08:20.106
Submitter:
Mohd Jasnizam Mohd Salleh

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