Simulation and structural optimization of flat double-P type radiant tubes based on the orthogonal method
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摘要: 在扁形雙P型輻射管的基礎上,研究了扁雙P型輻射管的中心管的等效半徑、支管的等效半徑、中心管和支管間距、管長等結構尺寸對輻射管性能的影響.通過建立正交試驗方案對輻射管結構尺寸以及燃燒器噴口結構位置進行優化.結果表明,影響輻射管表面溫差的最明顯因素依次:中心管與支管的間距、中心管等效半徑、管長和支管等效半徑;影響輻射管輻射功率的明顯因素依次:管長、中心管等效半徑、中心管與支管的間距和支管的等效半徑.上下空氣噴口與左右空氣噴口大小比例在7:3和9:1比較接近,輻射管的性能參數最好;左右空燃氣噴口間距為50 mm,上下空氣噴口間距在60 mm的情況下輻射管表面的溫度不均勻系數最小,為0.058.Abstract: The effects of structural dimensions such as central tube equivalent radius, branch tube equivalent radius, tube spacing, and tube length on the performance of a flat double-P type radiant tube were studied in this paper. The structural dimensions of the radiant tube and the positions of the burner nozzles were optimized using an orthogonal experimental program. It is shown that obvious influencing factors on the surface temperature difference of the radiant tube are tube spacing, central tube equivalent radius, tube length, and branch tube equivalent radius in turn. However, significant influencing factors on the radiant power of the radiant tube are tube length, central tube equivalent radius, tube spacing, and branch tube equivalent radius in order. When the size ratio of the upper to lower air nozzle is 7:3 and the size ratio of the left to right air nozzle is 9:1, the performance parameters of the radiation tube are the best. When the distance between the air and fuel gas nozzle is 50 mm and the air nozzle distance is 60 mm, the uneven coefficient of the radiation tube's surface temperature is the smallest at 0.058.
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Key words:
- radiant tubes /
- heat efficiency /
- model validation /
- orthogonal experiment /
- nitrogen oxide control
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參考文獻
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