Investigation on Thermal Boundary Layer Around Heated Spinning Cone by Using 3D-Holographic Interferometry

The convective flow around a heated rotating cone of finite length is investigated experimentally by means of 3D and realtime holographic interferometry at rotational speeds up to 4600 rpm and rotational angles from 0 to 90. This advanced optical technique allows visualization of the thermal boundar...

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Hauptverfasser:	Tieng, S. M, Wang, Y. C
Format:	Report
Sprache:	eng
Schlagworte:	BOUNDARY LAYER TRANSITION COMPARISON Component Reports CONVECTION(HEAT TRANSFER) EXPERIMENTAL DATA FLOW FIELDS FLOW VISUALIZATION Foreign reports Holographic interferometry Holography Optical Detection and Detectors OPTICAL INTERFEROMETERS REYNOLDS NUMBER ROTATION SPATIAL DISTRIBUTION TAIWAN THERMAL BOUNDARY LAYER Thermodynamics THREE DIMENSIONAL TURBULENCE
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Beschreibung
Zusammenfassung:	The convective flow around a heated rotating cone of finite length is investigated experimentally by means of 3D and realtime holographic interferometry at rotational speeds up to 4600 rpm and rotational angles from 0 to 90. This advanced optical technique allows visualization of the thermal boundary layer. It's unstable transition region and the turbulent zones, as well as providing a detailed visual analysis of the holographic fringe patterns. Information about the thickness of the thermal boundary layer, and a new method for detecting and determining the critical points and critcal Reynolds numbers of the transition region. The results are compared with previously obtained experimental data. (Author) This article is from 'International Symposium on Applications of Laser Techniques to Fluid Mechanics and Workshop on Computers in Flow Measurements (6th) Held in Lisbon, Portugal on July 20-23, 1992', AD-A258 510, p35.4.1-35.4.6.