Experimental Aerodynamics

Experimental techniques in aerodynamics: Pressure, temperature and velocity measurement techniques. Steady and unsteady pressure measurements and various types of pressure probes and transducers, errors in pressure measurements. Measurement of temperature using thermocouples, resistance thermometers, temperature sensitive paints and liquid crystals. Measurement of velocity using hot wire anemometry. Calibration of single and two wire probes. Velocity measurement using Laser Doppler Velocimetry and Particle Image Velocimetry. Data acquisition and digital signal processing techniques.


Application of ultrasonic burning rate measurement method on closed bombs
Mumcu, Berkan; Kurtuluş, Dilek Funda; Arkun, Uğur; Department of Aerospace Engineering (2013)
In this thesis study, detailed information about solid rocket motors and ultrasonic burning rate measurement method is given. An experimental setup is prepared for applying the ultrasonic burning rate measurement method. Before performing the burning tests, some pre-tests are performed for affirming the ultrasonic sensor and obtaining some experimental coefficients. Two different types of propellants, which do not include aluminum, are produced for the burning tests. The first type of the propellants has tw...
Prediction of drag force on gimbal system via balance technique and wake integration method
Yeşilyurt, Emrah; Albayrak, Kahraman; Department of Mechanical Engineering (2014)
This thesis study examines the drag force exerted on a mini gimbal system through two methods of drag prediction. Wind tunnel experiments are performed with the real gimbal model since it is small enough. Drag force is measured by the balance technique using a load-cell, consisting of a metal beam and strain gauges adhered to it, which is designed and produced. For various Reynolds numbers drag force exerted on the model is measured. Results are essential since there is a restricted literature about it due ...
Implementation and comparison of turbulence models on a flat plate problem using a Navier-Stokes solver
Genç, Balkan Ziya; Aksel, Mehmet Haluk; Department of Mechanical Engineering (2003)
For turbulent flow calculations, some of the well-known turbulence models in the literature are applied on a previously developed Navier-Stokes solver designed to handle laminar flows. A finite volume formulation, which is cell-based for inviscid terms and cell-vertex for viscous terms, is used for numerical discretization of the Navier-Stokes equations in conservative form. This formulation is combined with one-step, explicit time marching Lax-Wendroff numerical scheme that is second order accurate in spac...
Optimization of flapping airfoils for maximum thrust and propulsive efficiency
Tuncer, İsmail Hakkı; Kaya, Muhammed Çağrı (2005-11-01)
The thrust and/or propulsive efficiency of a single flapping airfoil is-maximized by using a numerical optimization method based on the steepest ascent. The flapping motion of the airfoil is described by a combined sinusoidal plunge and pitching motion. Optimization parameters are taken to be the amplitudes of the plunge and pitching motions and the phase shift between them at a fixed flapping frequency. Two-dimensional, unsteady, low-speed, laminar, and turbulent flows are computed by using a Navier-Stokes...
Structural optimization of composite and aluminum horizontal tail plane of a helicopter
Arpacıoğlu, Bertan; Kayran, Altan; Department of Aerospace Engineering (2019)
This thesis presents structural optimization studies of aluminum and composite material horizontal tail plane structure of a helicopter by using MSC.NASTRAN optimization capabilities. Structural design process starts from conceptual design phase, and structural layout design is performed by using CATIA. In the preliminary design phase, study focuses on minimum weight optimization with multiple design variables and similar constraints for both materials. Aerodynamic load calculation is performed using ANSYS ...
Citation Formats
D. F. Kurtuluş, “Experimental Aerodynamics,” 00, 2010, Accessed: 00, 2020. [Online]. Available: https://ocw.metu.edu.tr/course/view.php?id=66.