Detail Analisis Numerik Pengaruh Amplitudo Plunging Dan Frekuensi Pada Propulsi Tandem Airfoil Naca 0012 Tugas Akhir Bibliografi Author: SUSANTO, CHRISTOPHER ; Gunawan, Harjadi (Advisor); Tobing, Sheila (Advisor) Topik: Tandem Airfoil; Plunge Amplitude; Propulsion Bahasa: (ID )     Penerbit: Program Studi Teknik Mesin Fakultas Teknik Unika Atma Jaya     Tempat Terbit: Jakarta    Tahun Terbit: 2017     Jenis: Theses - Undergraduate Thesis Fulltext: Christopher Susanto’s Undergraduate Theses.pdf (3.54MB; 32 download) Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: FTM-2140 Non-tandon: tidak ada Tandon: 1  Lihat Detail Induk Abstract Research about aircraft design has been inspired by natural flyers such as birds and insects. Over the past two decades, the number of research on flapping wing flight has been increasing steadily due to its potential applications in the design and development of Micro Air Vehicles (MAVs). Micro air vehicles (MAVs) are unmanned aircraft with a dimension of approximately 15-20 cm with a cruising speed around 10-15 m/s, and a weight equal to or less than 200 grams which operate in a low Reynolds number regime (103-105). In this low Reynolds number regime, the lift-to-drag ratio of fixed wing/airfoil has decreased. This study focuses on plunging airfoil which is inspired by the flapping motion of insect wings. Flapping wings (3D) and airfoils (2D) utilizes the unsteady aerodynamic mechanisms such as leading-edge-vortex and spanwise flow to generate aerodynamic forces at low speed flow. Unlike previous works on flapping wings/airfoils that were performed on single wing/airfoil, this work focuses on two-dimensional (2D) tandem airfoil configurations. Airfoils are said to be in a tandem configuration if there are more than one wing on each side of an object (left or right), and the wings are positioned adjacent to each other. A tandem wing has several advantages over a single one, such as a greater lift. However, there were only a few researchers who studied tandem wings, especially at low Reynolds number flow. Tandem wings are commonly found on insects, such as bumblebees and dragonflies. The tandem airfoils examined in this study is inspired by the tandem wing of dragonflies. Dragonflies have been selected among numerous insects for their excellent maneuvering capabilities caused by their ability to control each wing independently. This manuvering ability is worth further study due to the potential applications in the design and development of flapping wing MAVs. The focus of this study is to numerically analyze the effects of plunging amplitude on the propulsion of tandem NACA 0012 airfoils. The parameters tested in this study is non-dimensional plunging amplitude ha with phase different each airfoil, the range of parameters tested is 0,031 < h < 0,012. The results obtained from this research are, first, the decrease in plunge amplitude results in the increament of lift. Thrust is produced by the tandem airfoil configuration in all plunge amplitude variations. Phase variations affect the efficiency of tandem airfoil configuration with the lowest efficiency of 32,47% and the highest 54,27%. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Lihat Sejarah Pengadaan  Konversi Metadata   Kembali

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