J0510203 3-D Density Measurement of Unsteady Natural Convection by Simultaneous Multi Angle Measurement System Using Twelve Cameras

The Colored Grid Background Oriented Schlieren (CGBOS) technique is applied to the measurement of the natural convection flow above a candle flame. Twelve digital cameras are employed to realize the simultaneous multi angle observation of the unsteady phenomena. The normal digital cameras are used to construct the multi-angle CGBOS measurement system with low-cost. To realize the three-dimensional (3-D) measurement of unsteady density field with CT (Computed Tomography) technique, simultaneous measurement system is necessary. The prospect of the measurement system is discussed and the measurement results are described.