Numerical and Experimental Study on Aerodynamic Characteristics of Basic Airfoils at Low Reynolds Numbers
スポンサーリンク
概要
- 論文の詳細を見る
The aerodynamic characteristics of airfoils have been researched in higher Reynolds-number ranges more than 106, in a historic context closely related with the developments of airplanes and fluid machineries in the last century. However, our knowledge is not enough at low and middle Reynolds-number ranges. So, in the present study, we investigate such basic airfoils as a NACA0015, a flat plate and the flat plates with modified fore-face and after-face geometries at Reynolds number Re < 1.0×105, using two- and three-dimensional computations together with wind-tunnel and water-tank experiments. As a result, we have revealed the effect of the Reynolds number Re upon the minimum drag coefficient CDmin. Besides, we have shown the effects of attack angle α upon various aerodynamic characteristics such as the lift coefficient CL, the drag coefficient CD and the lift-to-drag ratio CL/CD at Re = 1.0×102, discussing those effects on the basis of both near-flow-field information and surface-pressure profiles. Such results suggest the importance of sharp leading edges, which implies the possibility of an inversed NACA0015. Furthermore, concerning the flat-plate airfoil, we investigate the influences of fore-face and after-face geometries upon such effects.
論文 | ランダム
- Gastrointestinal Digestion and Absorption of Pen j 1, a Major Allergen from Kuruma Prawn, Penaeus japonicus
- To whom do you belong? Pir-Murid relationship and Silsila in medieval India (タリーカ特集)
- An ultra-wideband Rotman lens using modified dummy sidewalls
- 2端子対超音波モータ等価回路のパラメータ同定の留意点
- Possible Incursions of Gekko hokouensis (Reptilia: Squamata) into Non-native Area: An Example from Yakushima Island of the Northern Ryukyus, Japan