Density and temperature reconstruction of a flame-induced distorted flow field based on background-oriented schlieren (BOS) technique
| Autor: | Guang-Ming Guo, Hong Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Field (physics) Density gradient business.industry General Physics and Astronomy 01 natural sciences Flow field Displacement (vector) 010305 fluids & plasmas Computational physics 010309 optics Optics Distribution (mathematics) Experimental system Schlieren 0103 physical sciences Poisson's equation business |
| Zdroj: | Chinese Physics B. 26:064701 |
| ISSN: | 1674-1056 |
| Popis: | An experimental system based on the background-oriented schlieren (BOS) technique is built to reconstruct the density and temperature distribution of a flame-induced distorted flow field which has a density gradient. The cross-correlation algorithm with sub-pixel accuracy is introduced and used to calculate the background-element displacement of a disturbed image and a fourth-order difference scheme is also developed to solve the Poisson equation. An experiment for a disturbed flow field caused by a burning candle is performed to validate the built BOS system and the results indicate that density and temperature distribution of the disturbed flow field can be reconstructed accurately. A notable conclusion is that in order to make the reconstructed results have a satisfactory accuracy, the inquiry step length should be less than the size of the interrogation window. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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