Evaluation of Lifetime-based Pressure-Sensitive Paint Measurement in Low-speed Flow

The lifetime-based method has been applied to pressure-sensitive paint (PSP) measurement in low-speed flow. Based on theoretical considerations and sample tests, a method to calculate pressure using "a-priori" method was proposed. In this method, pressure is related to the ratio of the luminescent intensity ratios obtained at two different gates between the wind-on and wind-off conditions, multiplied by a temperature correction factor calculated from the single-point measurement of model substrate temperature. The sample tests showed that the effect of temperature as well as non-uniformity of lifetime could be cancelled out by the proposed method. In order to evaluate the effectiveness of this method, a simplified car model was tested in a low-speed wind tunnel. The result obtained by the lifetime method was in good agreement with those of pressure taps and the intensity method.

[1]  K. Asai,et al.  Advanced lifetime PSP imaging system for pressure and temperature field measurement , 2006 .

[2]  J. Bell,et al.  Surface Pressure Measurements Using Luminescent Coatings , 2003 .

[3]  Kazunori Mitsuo,et al.  Development of Lifetime Imaging System for Pressure-Sensitive Paint , 2002 .

[4]  Marvin Sellers.  Advances in AEDC's Lifetime Pressure-Sensitive Paint Program , 2005 .

[5]  K. Asai,et al.  Three-Gate Lifetime Imaging System for Pressure-Sensitive Paint Measurements , 2006 .

[6]  Tianshu Liu,et al.  Pressure and Temperature Sensitive Paints , 2004, Experimental Fluid Mechanics.

[7]  J. H. Bell,et al.  Accuracy limitations of lifetime-based pressure-sensitive paint (PSP) measurements , 2001, ICIASF 2001 Record, 19th International Congress on Instrumentation in Aerospace Simulation Facilities (Cat. No.01CH37215).

[8]  Thomas J. Mueller.  The 11th International Symposium on Flow Visualization , 2005, J. Vis..

[9]  Arnold Afb,et al.  Improved Data Processing for Pressure-Sensitive Paint Measurements in an Industrial Facility * , 2006 .

[10]  M. Gouterman,et al.  Ideality of pressure-sensitive paint. III. Effect of the base-coat permeability on the luminescence behavior of the sensing layer , 2000 .

[11]  J. W. Holmes,et al.  Analysis of radiometric, lifetime and fluorescent lifetime imaging for pressure sensitive paint , 1998, The Aeronautical Journal (1968).

[12]  Hiroki Nagai,et al.  PSP Measurement of the Flow around a Simplified Car Model , 2006 .