Identyfikatory
Warianty tytułu
Application of acoustic tomography for measurements of temperature in combustion chamber
Języki publikacji
Abstrakty
W artykule opisano tomograf akustyczny do pomiaru rozkładu pola temperatur w komorze paleniskowej. Zasada działania oparta jest na pomiarze czasuprzelotu fali akustycznej między wybranymi punktami zlokalizowanymi na obwodzie komory. W pracy przedstawiono wyniki rekonstrukcji pola temperatur na bazie pomiaru symulowanego komputerowo oraz rzeczywistego.
The paper shows a tomographic method for measurement of temperature distribution in combustion chamber. The principle idea is an acoustic time-of-flight measurement in a medium. Mounting a set of transceivers around combustion chambers in the selected plane one can measure the set of propagation times between every pair of the transceivers. Given a pair of transceivers determines the path of single ray. It is posible to reconstruct the spatial sound speed distribution across the plane using a tomographic algorithm. The temperature distribution T then can be calculated by the known speed of sound. To solve the problem the iterative ART-algorithm was used modified by Back Projection method. Simulations were performed for combustion chamber with square cross-section. A different transceiver layout has been used - 2, 3, 4 and 5 transceivers on each side. The symmetric and asymmetric temperature distribution was simulated using trigonometric and exponential function. Reconstructed the initial temperature distribution fits very well to assume one for each transceiver layout. The maximum pixel error in case of symmetric temperature field was found to be under 1.8% and 6% in case of asymmetric temperature field. The mean temperature was calculated to be between 1315 and 1340 K which differs from initial mean value by 4 ÷ 20 K. Also a stationary measurements have been carried out using a simple measurement unit. It consisted of two transceivers moving around the chamber during the measurement. The results show that such simple system can produce fairly good results.
Czasopismo
Rocznik
Tom
Strony
133--143
Opis fizyczny
Bibliogr. 11 poz., wykr.
Twórcy
autor
- Politechnika Wrocławska I-20, 50-370 Wrocław, Wybrzeże Wyspiańskiego 27
Bibliografia
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BWA2-0003-0039
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