Mohamed Aziz Youssef Mohamed Mousa <br/><br/>
Development of a novel thermoacoustic flue gas analyzer /  
 تطوير جهاز تحليل غازات عادم جديد يعمل بتكنولوجيا الصوت الحرارى 
Mohamed Aziz Youssef Mohamed Mousa ; Supervised Hindawi Salem M. Saleh , Ahmed I. Abdelrahman 
 - Cairo :   Mohamed Aziz Youssef Mohamed Mousa ,   2021 
 - 73 P . :   charts , facsmilies , photographes ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of  Engineering - Department of Mechanical Power Engineering 
<br/><br/> Flue Gas analyzers are commonly used to determine the molar concentrations of the different flue-gas mixtures species and provide information about the resulting combustion efficiency. Here, a new methodology for quaternary-gas analysis that relies on thermoacoustic technology is described to determine the composition of flue gas mixtures. The flue-gas mixtures resulting from the fossil fuel combustion are allowed to fill in an optimized half-wavelength thermoacoustic engines resonator. Under controlled cooling, spontaneous gas-particle oscillations appear at distinct values of resonance frequencies and onset temperature gradients that particularly depend on the molar concentrations of the quaternary-gas components (CO₂, CO, O₂ and N₂). Operational ternary diagrams, along with respective sensitivity profiles, are discussed in detail. A numerical model is constructed using ANSYS Fluent to assess the performance of the newly introduced methodology. This new sensor offers a simple, reliable, and relatively inexpensive alternative to existing flue-gas analyzers 
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<br/><br/><label>Subjects--Index Terms: </label>Acoustics Thermal Diffusivity Thermometry