Ishan.M.Shah, S. A. Thakkar, K. H. Thakkar, Bhavesh A. Patel / International Journal of Engineering Research and Applications (IJERA) ISSN: 2248-9622 www.ijera.com Vol. 3, Issue 4, Jul-Aug 2013, pp.2094-2103 2094 | P a g e Performance Analysis on Airfoil Model in Wind Tunnel Testing Machine (WTTM) Ishan.M.Shah 1 , S. A. Thakkar 2 , K. H. Thakkar 3 , Bhavesh A. Patel 4 (ME Student, Department of Mechanical Engineering, Sankalchand Patel College of Engineering, Visnagar, Gujarat, India) 1,4 (Assistant Professor, Department of Mechanical Engineering, Sankalchand Patel College of Engineering, Visnagar, Gujarat, India) 2,3 ABSTRACT A Wind Tunnel Testing Machine (WTTM) is a tool used in Aerodynamic research to study the effects of Air moving past to the solid objects. A wind tunnel testing machine consists of a closed tubular passage with the object under test mounted in the middle and powerful fan system moves air past to the object. The wing (airfoil) provides lift by creating a situation where the pressure above the wing is lower than the pressure below the wing. Since the pressure below the wing is higher than the pressure above the wing. The readings has been taken on airfoil model in Wind Tunnel Testing Machine (WTTM) at different air velocity 20m/sec, 25m/sec, 30m/sec and different angle of attack 0 0 ,5 0 ,10 0 ,15 0 ,20 0 . Air velocity and pressures are measured in several ways in wind tunnel testing machine by use to measuring instruments like Anemometer and Multi tube manometer. The Surface roughness of an airfoil is can be measure by Surface roughness tester. The heat signature of a testing model is can be measure by Thermal Imaging Camera. The CFD analysis is also carried out at various sections of airfoil angles and velocity. The maximum performance to the airfoil model is achieved at 10 0 on angle of attack. I. INTRODUCTION 1.1 Wind Tunnel A wind tunnel is a tool use in Aerodynamic research to study the effects of Air moving past to the solid objects. Fig 1 Wind Tunnel Machine A wind tunnel consists of a closed tubular passage with the object under test mounted in the middle and powerful fan system moves air past to the object. 1.2 AIRFOIL The airplane generates lift using its wings, the cross sectional shape of the wing is called an airfoil. An airfoil (in American English) or aerofoil (in British English) is the shape of a wing or blade. Fig 2 Airfoil Testing Model 1.3 Angle Of Attack Angle of attack is the angle between the body's reference line and the oncoming flow. Fig 3 Airfoil Model 1.4 Light Airplanes The takeoff and landing speed to a many light airplanes is 40 knots (72 km/h, 20 m/sec) to 55 knots (101 km/h, 28 m/sec). Fig 4 Light Airplanes