کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
734926 | 893553 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A simple Abel inversion method of interferometric data for temperature measurement in axisymmetric medium A simple Abel inversion method of interferometric data for temperature measurement in axisymmetric medium](/preview/png/734926.png)
In this work, we describe a simple method of Abel inversion for temperature measurement in a natural convection axisymmetric flow. The essence of the method is that the measured lateral fringe shift profile is fitted with a polynomial with only even powers and then Abel inverse integral is evaluated analytically. This technique is compared with recent existing methods to test the accuracy and error propagation using a simulated interferogram of natural convection flow below a downward-facing heated horizontal disk in air. For this comparison, lateral fringe profiles are simulated using temperature fields computed by solving Navier Stokes and energy equations. Through random-number generation, noise profile is artificially added to the simulated noise-free lateral fringe shift profile. The results showed that the proposed technique for Abel inversion leads to accurate temperature profiles when the lateral fringe shift profile is fitted with even-power polynomials having degrees ranging from 20 to 30.
► A simple Abel inversion technique for temperature measurement is presented.
► This technique is compared to modified Fourier–Hankel and Legendre wavelets methods.
► Test profiles are provided from a simulated interferogram of natural convection flow.
► The proposed technique leads to good accurate temperature.
Journal: Optics and Lasers in Engineering - Volume 50, Issue 3, March 2012, Pages 336–344