Akademik Veri Yönetim Sistemi
International Journal of Heat and Fluid Flow, cilt.107, 2024 (SCI-Expanded)
This paper presents an innovative approach by employing experimental and analytical methods to examine the impact of temperature changes in flue gases following combustion on design. Thermal performance experiments conducted on chimney samples have shown that a 2 mm axial expansion, resulting from thermal expansion, affects support designs. To analyze the impact of this often-neglected elongation in support designs and the axial movements caused by temperature, tensile tests were applied to five double-riveted samples with a diameter of 4.8. Subsequently, finite element analyses were conducted on the same model. The ratio between the stress results of the tensile tests and the finite element analysis was found to be 1.04, consistent with the literature. Following the validation of the tensile test, an analytical approach was developed by incorporating forces neglected due to expansion. This approach was complemented by an optimization study to improve the placement of rivets on the plate, for which a code was written. When run on a sample model, the code determined that the coordinates of the six rivets should be (119,50), (97,88), (53,88), (31,50), (53,12), and (97,12), respectively, within the constraints. Additionally, the code was executed with different optimization techniques to compare the results for composite force, number of rivets, circular radius, and coordinates. Furthermore, to observe the effect of temperature on chimney draft, calculations were made for different diameters like Ø 200, Ø 225, and Ø 250. It was observed that as the temperature increased towards 450 °C, there was an increase in pressure difference up to the saturation point. The findings may contribute to the existing literature for researchers and practitioners in this field. Additionally, the presented code offers the capability to quickly calculate the distribution of any fasteners on the plate according to the given data, without the need for a tensile test, finite element analysis, or any other numerical calculation method.